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Cave Astrola GEM Restore

Started by reconair, 06/17/2019 05:33PM
Posted 06/17/2019 05:33PM Opening Post
Working to restore my CAVE Astrola 10" EQM.  I need to remove the RA shaft from its housing.  Any clue how to do this?  The RA shaft appears to have locking collars at either end locked to the shaft by two hex nuts.  Both end of the shaft housing are to restrictive to allow me to use a small hex wrench.  The removal of either collar should allow the shaft to slide right out.  See the pics.

Attached Image:

reconair's attachment for post 163330

Scott Busby
A.K.A. Reconair

Carpe Noctum

Mortal as I am, I know that I am born for a day. But when I follow at my pleasure the serried multitude of the stars in their circular course, my feet no longer touch the earth.
- Ptolemy,c.150 AD
Posted 06/17/2019 09:41PM #1
You may be able to cut down an allen wrench (hex tool) short enough.....dremel tool etc.

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Posted 06/17/2019 10:20PM #2
Originally Posted by Greg Shaffer
You may be able to cut down an allen wrench (hex tool) short enough.....dremel tool etc.
Yep, I did just that and was able to loosen the hex nuts.  Once I got the one side done, I was able to shove the shaft far enough in the other direction to expose the hex nuts and remove them as well.  Problem is that the shaft will still not come out.  The collars on both ends are free wheeling and the shaft turns freely.  It looks like the collars are integral to the bearings.  I really don't want to force the bearings out.  I may never be able to re-insert them.

Scott Busby
A.K.A. Reconair

Carpe Noctum

Mortal as I am, I know that I am born for a day. But when I follow at my pleasure the serried multitude of the stars in their circular course, my feet no longer touch the earth.
- Ptolemy,c.150 AD
Posted 06/18/2019 11:11AM #3
Seems that the RA shaft bearing are the sealed type.  Was advised that if the bearings are smooth and the shaft is sound just leave it be.  Guess I'll just prep the surface and rattle can it.  Was thinking powder coat, but that involves heat that may be detrimental the the bearings.  May still consider a Sodium BiCarb blast and zylotone paint.  

Scott Busby
A.K.A. Reconair

Carpe Noctum

Mortal as I am, I know that I am born for a day. But when I follow at my pleasure the serried multitude of the stars in their circular course, my feet no longer touch the earth.
- Ptolemy,c.150 AD
Posted 06/23/2019 09:32PM #4
I am trying to repair my leg levelers on an Astrola mount - anyone have an idea where I can find 3/8" replacements?

Terry Atwood
Posted 06/23/2019 11:39PM #5
Originally Posted by Terry Atwood
I am trying to repair my leg levelers on an Astrola mount - anyone have an idea where I can find 3/8" replacements?

Terry Atwood
Post a pic.  I have the portable model with casters.  I also have levelers, but they don't look original.

Attached Image:

reconair's attachment for post 163455

Scott Busby
A.K.A. Reconair

Carpe Noctum

Mortal as I am, I know that I am born for a day. But when I follow at my pleasure the serried multitude of the stars in their circular course, my feet no longer touch the earth.
- Ptolemy,c.150 AD
Posted 06/23/2019 11:41PM #6
Cave Astrola 10-inch restore is coming along.  However, the RA motor is toast.  Any clue on a replacement option?

Attached Image:

reconair's attachment for post 163456

Scott Busby
A.K.A. Reconair

Carpe Noctum

Mortal as I am, I know that I am born for a day. But when I follow at my pleasure the serried multitude of the stars in their circular course, my feet no longer touch the earth.
- Ptolemy,c.150 AD
Posted 06/24/2019 03:01PM #7
I chased down this motor with Kramer, the company which took over Bristol Motors and the girl checked and said that it had been discontinued. I explained why I needed one, but she said after a search they could find no units in the building.

However, someone on Astro-mart advertised that they had some and I bought one from them. In New England, and the money was going to a non-profit. I'll look up that info. About two years ago as I recall.

It's a Bristol model 447, 1-rpm, with 1/8" shaft as I recall.

Terry Atwood
Posted 06/24/2019 03:10PM #8
Originally Posted by Terry Atwood
I chased down this motor with Kramer, the company which took over Bristol Motors and the girl checked and said that it had been discontinued. I explained why I needed one, but she said after a search they could find no units in the building.

However, someone on Astro-mart advertised that they had some and I bought one from them. In New England, and the money was going to a non-profit. I'll look up that info. About two years ago as I recall.

It's a Bristol model 447, 1-rpm, with 1/8" shaft as I recall.

Terry Atwood
Thanks Terry.  I was fortunate that someone in the Vintage Telescope Facebook Group had one he's sending me.  I still would like to have the source for future though.

Scott Busby
A.K.A. Reconair

Carpe Noctum

Mortal as I am, I know that I am born for a day. But when I follow at my pleasure the serried multitude of the stars in their circular course, my feet no longer touch the earth.
- Ptolemy,c.150 AD
Posted 06/25/2019 01:40PM #9
Cleaning up nicely.  Getting ready for paint.

Attached Image:

reconair's attachment for post 163470

Scott Busby
A.K.A. Reconair

Carpe Noctum

Mortal as I am, I know that I am born for a day. But when I follow at my pleasure the serried multitude of the stars in their circular course, my feet no longer touch the earth.
- Ptolemy,c.150 AD