Date   

Re: Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

M Hambrick
 

A high strength bronze (grade 630 or 642) would be a better choice than brass.


On Aug 17, 2021, at 2:28 PM, Cheng-Yang Tan via groups.io <cytan299@...> wrote:


The techs I work with use a lot of SS here (vacuum compatibility) and those threaded SS parts easily seize up and gall. That's why they use anti-seize.

Here's a few links that talk about SS on SS:




The mech. eng. whom are nowhere to be found today. I'll get back to you after I talk to them.


cytan



On Tuesday, August 17, 2021, 02:19:51 PM CDT, Roland Christen via groups.io <chris1011@...> wrote:



I thought I had heard it about because SS on SS is always prone to galling
I have never experienced that. SS is quite hard and does not gall in my experience.

Rolando


-----Original Message-----
From: Cheng-Yang Tan via groups.io <cytan299@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Tue, Aug 17, 2021 2:01 pm
Subject: Re: [ap-gto] Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

Hi Rolando,

This thing about using brass could be an old wive's tale that I thought I had heard it about because SS on SS is always prone to galling. Let me talk to the mech. eng. that I work with to see what they think.

It's definitely possible that it is dirt that caused the seizure, but it could easily be the SS on SS galling problem.

Just out of curiosity, do you use any type of grease or anti-seize on the threads of the CW shaft? 

cytan


On Tuesday, August 17, 2021, 12:22:52 PM CDT, Roland Christen via groups.io <chris1011@...> wrote:



 Do you think that a brass insert might actually be better rather than SS?
In talking with our machinists here, they don't think that using different materials will prevent this. It appears some contaminant was present on the threads which then locked up the shaft inside the adapter. Putting graphite on the threads may have attracted or held a bit of metal or other contaminant.

Rolando


-----Original Message-----
From: Cheng-Yang Tan via groups.io <cytan299@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Tue, Aug 17, 2021 11:43 am
Subject: Re: [ap-gto] Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

Hi Rolando,
   Believe me, I stopped once I felt it got stuck. I know enough to know when to stop :) But I guess, I wasn't fast enough ..,

   Do you think that a brass insert might actually be better rather than SS? The brass insert will just be a perishable that needs to be replaced once every few years.

cytan



On Tuesday, August 17, 2021, 11:39:42 AM CDT, Roland Christen via groups.io <chris1011@...> wrote:



The more important question, is how to not do this again.
If it doesn't thread in easily, don't force it. Unscrew it before it galls the metal and clean out whatever is causing it to not thread in.

Rolando


-----Original Message-----
From: Cheng-Yang Tan via groups.io <cytan299@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Tue, Aug 17, 2021 11:32 am
Subject: Re: [ap-gto] Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

I owe the guys doughnuts :)

I'll have to ask a real machinist to do this and that'll cost me lunch :) 

I have to get a new CW adapter anyways, so it's more cost effective to buy both directly from AP.

The more important question, is how to not do this again.

Suggestions?

cytan

On Tuesday, August 17, 2021, 11:29:09 AM CDT, Geert <geert.vandenbulcke@...> wrote:




You still have a perfectly good counterweight shaft if the machineshop cuts new thread on it, it will only be some inches shorter.

Geert

--------

cytan

P.S. I'll be ordering a new CW shaft + adapter today ...


--
Roland Christen
Astro-Physics

--
Roland Christen
Astro-Physics

--
Roland Christen
Astro-Physics


Re: APCC v1.9 and one-year renewal subscriptions #APCC

Chris White
 

Thanks Marj!

My breath caught when I saw your email as I am in the stowaway lottery... but this is also fantastic news!  

Appreciate the work you all put into this. Thank you!

-Chris White
Chris R White Photography

www.whitephotogallery.com
www.astrobin.com/users/CRW_Photography/


-------- Original message --------
From: Marj Christen <marj@...>
Date: 8/17/21 16:02 (GMT-05:00)
To: main@ap-gto.groups.io
Subject: [Special] [ap-gto] APCC v1.9 and one-year renewal subscriptions #APCC

APCC v1.9 is now available for download at the following links and from the APCC Download Center of our website.

https://www.apastrosoftware.com/apcc_download/ApccStandardLatest.exe
https://www.apastrosoftware.com/apcc_download/ApccProLatest.exe


This version has several long-awaited and significant new features for APCC Pro:

  •          APCC Pro - Declination-Arc tracking algorithm. This new algorithm is an alternative to the normal all sky tracking model that APCC Pro uses.
  •          APCC Pro - APPM can use ASTAP for plate-solving.
  •          APCC Pro - APPM can use NINA for camera control.
  •          APCC Pro - For third-party satellite trackers, real-time RA/Dec can be returned using the :GRGD# command.

Complete Version History with all updates and bug fixes for APCC Standard and PRO versions:

https://www.astro-physics.info/tech_support/software/apcc/apcc-version-history.pdf


Many thanks to Dale Ghent and Ray Gralak for working together to add NINA camera control to APCC. We know that many APCC users have been very interested in NINA to improve their workflow.

 

Since the introduction of APCC years ago, our website has stated that we intended to offer a subscription renewal option after the first year for approximately 20% of the price.  Many of you have been using APCC for years without any extra charge as we added new features and refined our pointing model.  Many features were suggested by users to streamline their workflow, provide additional information or control, integrate with other complimentary software and to safeguard your system.


The time has now come for us to implement our subscription renewal program so that we can continue to develop new features that our users have requested.


If the date of your APCC license key is August 1, 2020 or later, all of the new features outlined in the version history will be activated when you install v1.9.


If the date of your APCC license key is earlier than August 1, 2020, only the bug fixes and minor updates will be activated. To activate all the new major features, you will need to purchase a one-year renewal subscription. When that process is complete, you will receive a new license that includes the renewal date.


Major points:

  •         Renewal is optional. Your current version of APCC will continue to operate as it always has.
  •         Everyone is entitled to the bug fixes and minor updates of v1.9 and all new versions going forward regardless of whether you renew your subscription or not. We encourage you to keep your software up-to-date.
  •         The process for obtaining the one-year subscription takes you to the DigitalRiver MyCommerce e-commerce website. It is available to you at your convenience and does not require contact with our office.

You probably have many questions about this new process. We have anticipated many of these and encourage you to visit the Order and FAQ tabs of the APCC page on our website. Please take a few moments to read that first before your posting questions here.  

https://www.astro-physics.com/apcc


Thank you for supporting further development of APCC!!

--
Marj Christen
Astro-Physics


APCC v1.9 and one-year renewal subscriptions #APCC

 

APCC v1.9 is now available for download at the following links and from the APCC Download Center of our website.

https://www.apastrosoftware.com/apcc_download/ApccStandardLatest.exe
https://www.apastrosoftware.com/apcc_download/ApccProLatest.exe


This version has several long-awaited and significant new features for APCC Pro:

  •          APCC Pro - Declination-Arc tracking algorithm. This new algorithm is an alternative to the normal all sky tracking model that APCC Pro uses.
  •          APCC Pro - APPM can use ASTAP for plate-solving.
  •          APCC Pro - APPM can use NINA for camera control.
  •          APCC Pro - For third-party satellite trackers, real-time RA/Dec can be returned using the :GRGD# command.

Complete Version History with all updates and bug fixes for APCC Standard and PRO versions:

https://www.astro-physics.info/tech_support/software/apcc/apcc-version-history.pdf


Many thanks to Dale Ghent and Ray Gralak for working together to add NINA camera control to APCC. We know that many APCC users have been very interested in NINA to improve their workflow.

 

Since the introduction of APCC years ago, our website has stated that we intended to offer a subscription renewal option after the first year for approximately 20% of the price.  Many of you have been using APCC for years without any extra charge as we added new features and refined our pointing model.  Many features were suggested by users to streamline their workflow, provide additional information or control, integrate with other complimentary software and to safeguard your system.


The time has now come for us to implement our subscription renewal program so that we can continue to develop new features that our users have requested.


If the date of your APCC license key is August 1, 2020 or later, all of the new features outlined in the version history will be activated when you install v1.9.


If the date of your APCC license key is earlier than August 1, 2020, only the bug fixes and minor updates will be activated. To activate all the new major features, you will need to purchase a one-year renewal subscription. When that process is complete, you will receive a new license that includes the renewal date.


Major points:

  •         Renewal is optional. Your current version of APCC will continue to operate as it always has.
  •         Everyone is entitled to the bug fixes and minor updates of v1.9 and all new versions going forward regardless of whether you renew your subscription or not. We encourage you to keep your software up-to-date.
  •         The process for obtaining the one-year subscription takes you to the DigitalRiver MyCommerce e-commerce website. It is available to you at your convenience and does not require contact with our office.

You probably have many questions about this new process. We have anticipated many of these and encourage you to visit the Order and FAQ tabs of the APCC page on our website. Please take a few moments to read that first before your posting questions here.  

https://www.astro-physics.com/apcc


Thank you for supporting further development of APCC!!

--
Marj Christen
Astro-Physics


Re: Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

Jack Huerkamp
 

Rolando,

 

The head of the machine shop for the utility that I worked for always suggested on applying Never-Seez anti-seize compounds on stainless steel fasteners.  I learned the hard way, when a few of the stainless steel machine screws on my old observatory had seized up and gave me great difficulty when I went to disassemble the dome to install its replacement.

 

Yours truly,

 

Jack

 

Jack Huerkamp

Jack's Astro Accessories, LLC

38388 Pine Street

Pearl River, LA 70452-5192

985-445-5063

mallincamusa@...

www.mallincamusa.com

30.37N  89.76W

 

All of us get lost in the darkness.
Dreamers learn to steer by the stars.

………………………………….Neil Peart

 

 

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Roland Christen via groups.io
Sent: Tuesday, August 17, 2021 2:20 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

 

 

I thought I had heard it about because SS on SS is always prone to galling

I have never experienced that. SS is quite hard and does not gall in my experience.

 

Rolando

 

 

-----Original Message-----
From: Cheng-Yang Tan via groups.io <cytan299@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Tue, Aug 17, 2021 2:01 pm
Subject: Re: [ap-gto] Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

Hi Rolando,

 

This thing about using brass could be an old wive's tale that I thought I had heard it about because SS on SS is always prone to galling. Let me talk to the mech. eng. that I work with to see what they think.

 

It's definitely possible that it is dirt that caused the seizure, but it could easily be the SS on SS galling problem.

 

Just out of curiosity, do you use any type of grease or anti-seize on the threads of the CW shaft? 

 

cytan

 

 

On Tuesday, August 17, 2021, 12:22:52 PM CDT, Roland Christen via groups.io <chris1011@...> wrote:

 

 

 

 Do you think that a brass insert might actually be better rather than SS?

In talking with our machinists here, they don't think that using different materials will prevent this. It appears some contaminant was present on the threads which then locked up the shaft inside the adapter. Putting graphite on the threads may have attracted or held a bit of metal or other contaminant.

 

Rolando

 

 

-----Original Message-----
From: Cheng-Yang Tan via groups.io <cytan299@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Tue, Aug 17, 2021 11:43 am
Subject: Re: [ap-gto] Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

Hi Rolando,

   Believe me, I stopped once I felt it got stuck. I know enough to know when to stop :) But I guess, I wasn't fast enough ..,

 

   Do you think that a brass insert might actually be better rather than SS? The brass insert will just be a perishable that needs to be replaced once every few years.

 

cytan

 

 

 

On Tuesday, August 17, 2021, 11:39:42 AM CDT, Roland Christen via groups.io <chris1011@...> wrote:

 

 

 

The more important question, is how to not do this again.

If it doesn't thread in easily, don't force it. Unscrew it before it galls the metal and clean out whatever is causing it to not thread in.

 

Rolando

 

 

-----Original Message-----
From: Cheng-Yang Tan via groups.io <cytan299@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Tue, Aug 17, 2021 11:32 am
Subject: Re: [ap-gto] Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

I owe the guys doughnuts :)

 

I'll have to ask a real machinist to do this and that'll cost me lunch :) 

 

I have to get a new CW adapter anyways, so it's more cost effective to buy both directly from AP.

 

The more important question, is how to not do this again.

 

Suggestions?

 

cytan

 

On Tuesday, August 17, 2021, 11:29:09 AM CDT, Geert <geert.vandenbulcke@...> wrote:

 

 

 

 

You still have a perfectly good counterweight shaft if the machineshop cuts new thread on it, it will only be some inches shorter.

 

Geert

 

--------

 

cytan

 

P.S. I'll be ordering a new CW shaft + adapter today ...

 


--
Roland Christen
Astro-Physics


--
Roland Christen
Astro-Physics


--
Roland Christen
Astro-Physics


Virus-free. www.avg.com


Re: Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

Cheng-Yang Tan
 

One other thing, we also silver plate our nuts and bolts to prevent galling.

cytan

On Tuesday, August 17, 2021, 02:28:35 PM CDT, Cheng-Yang Tan via groups.io <cytan299@...> wrote:


The techs I work with use a lot of SS here (vacuum compatibility) and those threaded SS parts easily seize up and gall. That's why they use anti-seize.

Here's a few links that talk about SS on SS:




The mech. eng. whom are nowhere to be found today. I'll get back to you after I talk to them.


cytan



On Tuesday, August 17, 2021, 02:19:51 PM CDT, Roland Christen via groups.io <chris1011@...> wrote:



I thought I had heard it about because SS on SS is always prone to galling
I have never experienced that. SS is quite hard and does not gall in my experience.

Rolando


-----Original Message-----
From: Cheng-Yang Tan via groups.io <cytan299@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Tue, Aug 17, 2021 2:01 pm
Subject: Re: [ap-gto] Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

Hi Rolando,

This thing about using brass could be an old wive's tale that I thought I had heard it about because SS on SS is always prone to galling. Let me talk to the mech. eng. that I work with to see what they think.

It's definitely possible that it is dirt that caused the seizure, but it could easily be the SS on SS galling problem.

Just out of curiosity, do you use any type of grease or anti-seize on the threads of the CW shaft? 

cytan


On Tuesday, August 17, 2021, 12:22:52 PM CDT, Roland Christen via groups.io <chris1011@...> wrote:



 Do you think that a brass insert might actually be better rather than SS?
In talking with our machinists here, they don't think that using different materials will prevent this. It appears some contaminant was present on the threads which then locked up the shaft inside the adapter. Putting graphite on the threads may have attracted or held a bit of metal or other contaminant.

Rolando


-----Original Message-----
From: Cheng-Yang Tan via groups.io <cytan299@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Tue, Aug 17, 2021 11:43 am
Subject: Re: [ap-gto] Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

Hi Rolando,
   Believe me, I stopped once I felt it got stuck. I know enough to know when to stop :) But I guess, I wasn't fast enough ..,

   Do you think that a brass insert might actually be better rather than SS? The brass insert will just be a perishable that needs to be replaced once every few years.

cytan



On Tuesday, August 17, 2021, 11:39:42 AM CDT, Roland Christen via groups.io <chris1011@...> wrote:



The more important question, is how to not do this again.
If it doesn't thread in easily, don't force it. Unscrew it before it galls the metal and clean out whatever is causing it to not thread in.

Rolando


-----Original Message-----
From: Cheng-Yang Tan via groups.io <cytan299@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Tue, Aug 17, 2021 11:32 am
Subject: Re: [ap-gto] Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

I owe the guys doughnuts :)

I'll have to ask a real machinist to do this and that'll cost me lunch :) 

I have to get a new CW adapter anyways, so it's more cost effective to buy both directly from AP.

The more important question, is how to not do this again.

Suggestions?

cytan

On Tuesday, August 17, 2021, 11:29:09 AM CDT, Geert <geert.vandenbulcke@...> wrote:




You still have a perfectly good counterweight shaft if the machineshop cuts new thread on it, it will only be some inches shorter.

Geert

--------

cytan

P.S. I'll be ordering a new CW shaft + adapter today ...


--
Roland Christen
Astro-Physics

--
Roland Christen
Astro-Physics

--
Roland Christen
Astro-Physics


Re: Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

Cheng-Yang Tan
 

The techs I work with use a lot of SS here (vacuum compatibility) and those threaded SS parts easily seize up and gall. That's why they use anti-seize.

Here's a few links that talk about SS on SS:




The mech. eng. whom are nowhere to be found today. I'll get back to you after I talk to them.


cytan



On Tuesday, August 17, 2021, 02:19:51 PM CDT, Roland Christen via groups.io <chris1011@...> wrote:



I thought I had heard it about because SS on SS is always prone to galling
I have never experienced that. SS is quite hard and does not gall in my experience.

Rolando


-----Original Message-----
From: Cheng-Yang Tan via groups.io <cytan299@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Tue, Aug 17, 2021 2:01 pm
Subject: Re: [ap-gto] Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

Hi Rolando,

This thing about using brass could be an old wive's tale that I thought I had heard it about because SS on SS is always prone to galling. Let me talk to the mech. eng. that I work with to see what they think.

It's definitely possible that it is dirt that caused the seizure, but it could easily be the SS on SS galling problem.

Just out of curiosity, do you use any type of grease or anti-seize on the threads of the CW shaft? 

cytan


On Tuesday, August 17, 2021, 12:22:52 PM CDT, Roland Christen via groups.io <chris1011@...> wrote:



 Do you think that a brass insert might actually be better rather than SS?
In talking with our machinists here, they don't think that using different materials will prevent this. It appears some contaminant was present on the threads which then locked up the shaft inside the adapter. Putting graphite on the threads may have attracted or held a bit of metal or other contaminant.

Rolando


-----Original Message-----
From: Cheng-Yang Tan via groups.io <cytan299@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Tue, Aug 17, 2021 11:43 am
Subject: Re: [ap-gto] Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

Hi Rolando,
   Believe me, I stopped once I felt it got stuck. I know enough to know when to stop :) But I guess, I wasn't fast enough ..,

   Do you think that a brass insert might actually be better rather than SS? The brass insert will just be a perishable that needs to be replaced once every few years.

cytan



On Tuesday, August 17, 2021, 11:39:42 AM CDT, Roland Christen via groups.io <chris1011@...> wrote:



The more important question, is how to not do this again.
If it doesn't thread in easily, don't force it. Unscrew it before it galls the metal and clean out whatever is causing it to not thread in.

Rolando


-----Original Message-----
From: Cheng-Yang Tan via groups.io <cytan299@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Tue, Aug 17, 2021 11:32 am
Subject: Re: [ap-gto] Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

I owe the guys doughnuts :)

I'll have to ask a real machinist to do this and that'll cost me lunch :) 

I have to get a new CW adapter anyways, so it's more cost effective to buy both directly from AP.

The more important question, is how to not do this again.

Suggestions?

cytan

On Tuesday, August 17, 2021, 11:29:09 AM CDT, Geert <geert.vandenbulcke@...> wrote:




You still have a perfectly good counterweight shaft if the machineshop cuts new thread on it, it will only be some inches shorter.

Geert

--------

cytan

P.S. I'll be ordering a new CW shaft + adapter today ...


--
Roland Christen
Astro-Physics

--
Roland Christen
Astro-Physics

--
Roland Christen
Astro-Physics


Re: Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

Roland Christen
 


I thought I had heard it about because SS on SS is always prone to galling
I have never experienced that. SS is quite hard and does not gall in my experience.

Rolando


-----Original Message-----
From: Cheng-Yang Tan via groups.io <cytan299@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Tue, Aug 17, 2021 2:01 pm
Subject: Re: [ap-gto] Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

Hi Rolando,

This thing about using brass could be an old wive's tale that I thought I had heard it about because SS on SS is always prone to galling. Let me talk to the mech. eng. that I work with to see what they think.

It's definitely possible that it is dirt that caused the seizure, but it could easily be the SS on SS galling problem.

Just out of curiosity, do you use any type of grease or anti-seize on the threads of the CW shaft? 

cytan


On Tuesday, August 17, 2021, 12:22:52 PM CDT, Roland Christen via groups.io <chris1011@...> wrote:



 Do you think that a brass insert might actually be better rather than SS?
In talking with our machinists here, they don't think that using different materials will prevent this. It appears some contaminant was present on the threads which then locked up the shaft inside the adapter. Putting graphite on the threads may have attracted or held a bit of metal or other contaminant.

Rolando


-----Original Message-----
From: Cheng-Yang Tan via groups.io <cytan299@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Tue, Aug 17, 2021 11:43 am
Subject: Re: [ap-gto] Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

Hi Rolando,
   Believe me, I stopped once I felt it got stuck. I know enough to know when to stop :) But I guess, I wasn't fast enough ..,

   Do you think that a brass insert might actually be better rather than SS? The brass insert will just be a perishable that needs to be replaced once every few years.

cytan



On Tuesday, August 17, 2021, 11:39:42 AM CDT, Roland Christen via groups.io <chris1011@...> wrote:



The more important question, is how to not do this again.
If it doesn't thread in easily, don't force it. Unscrew it before it galls the metal and clean out whatever is causing it to not thread in.

Rolando


-----Original Message-----
From: Cheng-Yang Tan via groups.io <cytan299@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Tue, Aug 17, 2021 11:32 am
Subject: Re: [ap-gto] Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

I owe the guys doughnuts :)

I'll have to ask a real machinist to do this and that'll cost me lunch :) 

I have to get a new CW adapter anyways, so it's more cost effective to buy both directly from AP.

The more important question, is how to not do this again.

Suggestions?

cytan

On Tuesday, August 17, 2021, 11:29:09 AM CDT, Geert <geert.vandenbulcke@...> wrote:




You still have a perfectly good counterweight shaft if the machineshop cuts new thread on it, it will only be some inches shorter.

Geert

--------

cytan

P.S. I'll be ordering a new CW shaft + adapter today ...


--
Roland Christen
Astro-Physics

--
Roland Christen
Astro-Physics

--
Roland Christen
Astro-Physics


Re: Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

Cheng-Yang Tan
 

Hi Rolando,

This thing about using brass could be an old wive's tale that I thought I had heard it about because SS on SS is always prone to galling. Let me talk to the mech. eng. that I work with to see what they think.

It's definitely possible that it is dirt that caused the seizure, but it could easily be the SS on SS galling problem.

Just out of curiosity, do you use any type of grease or anti-seize on the threads of the CW shaft? 

cytan


On Tuesday, August 17, 2021, 12:22:52 PM CDT, Roland Christen via groups.io <chris1011@...> wrote:



 Do you think that a brass insert might actually be better rather than SS?
In talking with our machinists here, they don't think that using different materials will prevent this. It appears some contaminant was present on the threads which then locked up the shaft inside the adapter. Putting graphite on the threads may have attracted or held a bit of metal or other contaminant.

Rolando


-----Original Message-----
From: Cheng-Yang Tan via groups.io <cytan299@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Tue, Aug 17, 2021 11:43 am
Subject: Re: [ap-gto] Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

Hi Rolando,
   Believe me, I stopped once I felt it got stuck. I know enough to know when to stop :) But I guess, I wasn't fast enough ..,

   Do you think that a brass insert might actually be better rather than SS? The brass insert will just be a perishable that needs to be replaced once every few years.

cytan



On Tuesday, August 17, 2021, 11:39:42 AM CDT, Roland Christen via groups.io <chris1011@...> wrote:



The more important question, is how to not do this again.
If it doesn't thread in easily, don't force it. Unscrew it before it galls the metal and clean out whatever is causing it to not thread in.

Rolando


-----Original Message-----
From: Cheng-Yang Tan via groups.io <cytan299@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Tue, Aug 17, 2021 11:32 am
Subject: Re: [ap-gto] Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

I owe the guys doughnuts :)

I'll have to ask a real machinist to do this and that'll cost me lunch :) 

I have to get a new CW adapter anyways, so it's more cost effective to buy both directly from AP.

The more important question, is how to not do this again.

Suggestions?

cytan

On Tuesday, August 17, 2021, 11:29:09 AM CDT, Geert <geert.vandenbulcke@...> wrote:




You still have a perfectly good counterweight shaft if the machineshop cuts new thread on it, it will only be some inches shorter.

Geert

--------

cytan

P.S. I'll be ordering a new CW shaft + adapter today ...


--
Roland Christen
Astro-Physics

--
Roland Christen
Astro-Physics


Re: Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

Christopher Erickson
 

They are not galled.

There are aluminum slivers bound in the threads from the previous all-aluminum counterweight shaft adapter.

"My advice is always free and worth every penny!"

-Christopher Erickson
Observatory Engineer
Summit Kinetics
Waikoloa, Hawaii


On Tue, Aug 17, 2021 at 5:06 AM J. Belden via groups.io <jjb4469=yahoo.com@groups.io> wrote:
I had an extremely difficult time getting three extension parts apart(Nightcrawler extensions) but heating, cooling, swearing, strap wrenches, lubricants and etc did not budge.  So, I ended up having to dremel cut one of the extension tubes to save the other two, so I know it seems like an over engineered effort but sometimes it just happens.  Though, these three parts were AL but SS can be a pain as well when it gets galled.

Joe

Good luck






Re: Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

Christopher Erickson
 

Take the counterweight shaft and stuck adapter to a friendly local machine shop.

Take the counterweight shaft and stuck adapter to a friendly local machine shop.

Take the counterweight shaft and stuck adapter to a friendly local machine shop.

Take the counterweight shaft and stuck adapter to a friendly local machine shop.

Take the counterweight shaft and stuck adapter to a friendly local machine shop.

"My advice is always free and worth every penny!"

-Christopher Erickson
Observatory Engineer
Summit Kinetics
Waikoloa, Hawaii


Virus-free. www.avg.com


On Tue, Aug 17, 2021 at 4:02 AM Klwalsh2061 <kevin.walsh@...> wrote:

Odd size nuts? Maybe so. 

Try McMaster-Carr. They carry an extremely wide selection of hardware, including large SAE and Metric nuts and bolts. 


Re: Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

J. Belden
 

My two cents, periodically inspect the threads, clean threads with a brass brush, then a taste of never seize. If the threads look damaged, I chase them with a tap or die, but most important I try not to bang or mishandle the parts. Use you fingers to puck up on any abnormal sensations, if it doesn’t feel right, stop and investigate.
My issue with my Nightcrawler extensions was I got in a hurry and didn’t catch on that I was using a bit more force than normal, then it was all over but the crying. Glad it wasn’t a work part because you get fired over doing things like that, especially if you lose a bunch of time or worse, having to change out parts that cost thousands of dollars.

Joe


Re: Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

Roland Christen
 


 Do you think that a brass insert might actually be better rather than SS?
In talking with our machinists here, they don't think that using different materials will prevent this. It appears some contaminant was present on the threads which then locked up the shaft inside the adapter. Putting graphite on the threads may have attracted or held a bit of metal or other contaminant.

Rolando


-----Original Message-----
From: Cheng-Yang Tan via groups.io <cytan299@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Tue, Aug 17, 2021 11:43 am
Subject: Re: [ap-gto] Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

Hi Rolando,
   Believe me, I stopped once I felt it got stuck. I know enough to know when to stop :) But I guess, I wasn't fast enough ..,

   Do you think that a brass insert might actually be better rather than SS? The brass insert will just be a perishable that needs to be replaced once every few years.

cytan



On Tuesday, August 17, 2021, 11:39:42 AM CDT, Roland Christen via groups.io <chris1011@...> wrote:



The more important question, is how to not do this again.
If it doesn't thread in easily, don't force it. Unscrew it before it galls the metal and clean out whatever is causing it to not thread in.

Rolando


-----Original Message-----
From: Cheng-Yang Tan via groups.io <cytan299@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Tue, Aug 17, 2021 11:32 am
Subject: Re: [ap-gto] Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

I owe the guys doughnuts :)

I'll have to ask a real machinist to do this and that'll cost me lunch :) 

I have to get a new CW adapter anyways, so it's more cost effective to buy both directly from AP.

The more important question, is how to not do this again.

Suggestions?

cytan

On Tuesday, August 17, 2021, 11:29:09 AM CDT, Geert <geert.vandenbulcke@...> wrote:




You still have a perfectly good counterweight shaft if the machineshop cuts new thread on it, it will only be some inches shorter.

Geert

--------

cytan

P.S. I'll be ordering a new CW shaft + adapter today ...


--
Roland Christen
Astro-Physics

--
Roland Christen
Astro-Physics


Re: Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

Roland Christen
 


Someone suggested once to turn the mount upside down while inserting the counterweight shaft and let gravity pull the shaft into the threads
That is how I do it, actually.

Rolando


-----Original Message-----
From: Joel Short <buckeyestargazer@...>
To: main@ap-gto.groups.io
Sent: Tue, Aug 17, 2021 11:47 am
Subject: Re: [ap-gto] Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

On Tue, Aug 17, 2021 at 11:32 AM, Cheng-Yang Tan wrote:
The more important question, is how to not do this again.
Someone suggested once to turn the mount upside down while inserting the counterweight shaft and let gravity pull the shaft into the threads (being careful not to force anything).  I have found this to be immensely helpful advice.  For some reason when I would try to hold the counterweight shaft from below and push up it would take several tries to get it right.  Flipping the mount upside down and holding the shaft over the mount threads results in mating the parts easily, at least for me.  
joel

--
Roland Christen
Astro-Physics


Re: Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

Cheng-Yang Tan
 

The new CW shafts have a lead in and that really helps square it w.r.t. the adapter. I usually get it in after the first try ... which was also true for the gouging incident ...

cytan

On Tuesday, August 17, 2021, 11:47:07 AM CDT, Joel Short <buckeyestargazer@...> wrote:


On Tue, Aug 17, 2021 at 11:32 AM, Cheng-Yang Tan wrote:
The more important question, is how to not do this again.
Someone suggested once to turn the mount upside down while inserting the counterweight shaft and let gravity pull the shaft into the threads (being careful not to force anything).  I have found this to be immensely helpful advice.  For some reason when I would try to hold the counterweight shaft from below and push up it would take several tries to get it right.  Flipping the mount upside down and holding the shaft over the mount threads results in mating the parts easily, at least for me.  
joel


Re: Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

Joel Short
 

On Tue, Aug 17, 2021 at 11:32 AM, Cheng-Yang Tan wrote:
The more important question, is how to not do this again.
Someone suggested once to turn the mount upside down while inserting the counterweight shaft and let gravity pull the shaft into the threads (being careful not to force anything).  I have found this to be immensely helpful advice.  For some reason when I would try to hold the counterweight shaft from below and push up it would take several tries to get it right.  Flipping the mount upside down and holding the shaft over the mount threads results in mating the parts easily, at least for me.  
joel


Re: Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

Cheng-Yang Tan
 

Hi Rolando,
   Believe me, I stopped once I felt it got stuck. I know enough to know when to stop :) But I guess, I wasn't fast enough ..,

   Do you think that a brass insert might actually be better rather than SS? The brass insert will just be a perishable that needs to be replaced once every few years.

cytan



On Tuesday, August 17, 2021, 11:39:42 AM CDT, Roland Christen via groups.io <chris1011@...> wrote:



The more important question, is how to not do this again.
If it doesn't thread in easily, don't force it. Unscrew it before it galls the metal and clean out whatever is causing it to not thread in.

Rolando


-----Original Message-----
From: Cheng-Yang Tan via groups.io <cytan299@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Tue, Aug 17, 2021 11:32 am
Subject: Re: [ap-gto] Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

I owe the guys doughnuts :)

I'll have to ask a real machinist to do this and that'll cost me lunch :) 

I have to get a new CW adapter anyways, so it's more cost effective to buy both directly from AP.

The more important question, is how to not do this again.

Suggestions?

cytan

On Tuesday, August 17, 2021, 11:29:09 AM CDT, Geert <geert.vandenbulcke@...> wrote:




You still have a perfectly good counterweight shaft if the machineshop cuts new thread on it, it will only be some inches shorter.

Geert

--------

cytan

P.S. I'll be ordering a new CW shaft + adapter today ...


--
Roland Christen
Astro-Physics


Re: Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

Roland Christen
 


The more important question, is how to not do this again.
If it doesn't thread in easily, don't force it. Unscrew it before it galls the metal and clean out whatever is causing it to not thread in.

Rolando


-----Original Message-----
From: Cheng-Yang Tan via groups.io <cytan299@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Tue, Aug 17, 2021 11:32 am
Subject: Re: [ap-gto] Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

I owe the guys doughnuts :)

I'll have to ask a real machinist to do this and that'll cost me lunch :) 

I have to get a new CW adapter anyways, so it's more cost effective to buy both directly from AP.

The more important question, is how to not do this again.

Suggestions?

cytan

On Tuesday, August 17, 2021, 11:29:09 AM CDT, Geert <geert.vandenbulcke@...> wrote:




You still have a perfectly good counterweight shaft if the machineshop cuts new thread on it, it will only be some inches shorter.

Geert

--------

cytan

P.S. I'll be ordering a new CW shaft + adapter today ...


--
Roland Christen
Astro-Physics


Re: Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

Cheng-Yang Tan
 

I owe the guys doughnuts :)

I'll have to ask a real machinist to do this and that'll cost me lunch :) 

I have to get a new CW adapter anyways, so it's more cost effective to buy both directly from AP.

The more important question, is how to not do this again.

Suggestions?

cytan

On Tuesday, August 17, 2021, 11:29:09 AM CDT, Geert <geert.vandenbulcke@...> wrote:




You still have a perfectly good counterweight shaft if the machineshop cuts new thread on it, it will only be some inches shorter.

Geert

--------


cytan

P.S. I'll be ordering a new CW shaft + adapter today ...


Re: Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

Geert
 



You still have a perfectly good counterweight shaft if the machineshop cuts new thread on it, it will only be some inches shorter.

Geert

--------


cytan

P.S. I'll be ordering a new CW shaft + adapter today ...


Re: Ugghhh cross threaded CW shaft into CW shaft adapter with metal threaded sleeve

Joe Zeglinski
 

Hi,
 
    Here’s another suggestion, which hasn’t been suggested,  quite the same way, on getting the adapter loose enough to “torque” off the bar.
 
    Heating the mated combination or freezing the combination doesn’t seem to have much effect, since the SS materials just respond the same way, and shrink or expand together too slowly. Then they return to the same temperature even if you act quickly. But, how about “differential heating”
of the two parts ?
 
    The trick is to keep the “bar as cool as possible”, relative to the adapter's “elevated”  temperature.
Perhaps the cwt.  bar could be (safely) secured in a large vice, and just heat the adapter itself, from an air-flow directed nozzle adapter of  very hot HEAT GUN.  A hair dryer might work, set at its highest level, but not quite as effectively as the bench tool.
 
    Before inserting in the bench vice, shield the bar   nearest to the adapter, away  from the hot air stream  as best you can, perhaps even with just several wrapped layers of  fibreglass wool walll insulation. The glass  will keep the heat gun’s air stream  from hitting and warming the bar too quickly, as the “much smaller mass”  of the adapter’s threaded hole  expands “radially outward” much faster, hopefully releasing its grip on the cwt. threads.
 
    At that point - acting as quickly as you can - grip the adapter with heavy work gloves, something like  “welders gloves”, and see if it will budge.
If that still fails, devise an  “insulated lever bar” – say,  a 2-foot long  piece of 2x4 , drilled  at its length centre , with hole being slightly larger than  the cwt. threads diameter. Slip it over the end of the bar and bolt the 2x4  to the adapter’s two  holes,  one above and below the adapter ring centre.
 
    Finally, you can slam the 2x4  at its top end, with a sledge hammer, giving  that added levered torque the 2x4 extension provides to the adapter, to break the thread’s bind. The 2x4 being wood, won’t affect the continual heat being delivered  to the adapter ring’s  “opposite face” side, so the adapter  continues to expand, while the heat “isolated”  cwt. bar still remains relatively cooler, for a while.
 
    If it doesn’t break the seal with repeated strikes the first time, have a bucket of ice-water handy, to pour ONLY  over the bar’s far end itself, and give the 2x4 lever another slam, since the ice water should then have even shrunk the bar diameter somewhat, while the adapter is still quite hot, and its centre diameter still  expanding from the continual  heat gun air stream.
 
    I think that the triple combination of the  “differential heating” of the adapter outer area,  with something like a 1,200 watt heat gun, while additionally super cooling the bar “nearby ” (but not on), the adapter, should respond well, to a strong slam at the extreme end of the 2x4 lever arm -  with say a 5 lb. sledge  hammer.
 
    Desperate times ... call for desperate measures !
 
Joe Z.

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