Papst Motor Capstan removal ? - diyAudio
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Old 2nd September 2009, 08:41 PM   #1
ckniker is offline ckniker  United States
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Join Date: Jul 2007
Default Papst Motor Capstan removal ?

I've accumulated a couple of Papst Motors for an upcoming turntable project.

What is the best way to remove the capstans from the motor shaft without damaging the shaft or the motor?

The capstans appear to be press fit and can't be removed by hand (at least not by my hands).

One motor was taken from an Empire turntable and the other from a Fairchild. See the attached picture.

Thanks in advance,

Chris
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Old 2nd September 2009, 10:00 PM   #2
H3nry is offline H3nry  United States
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Join Date: Aug 2009
Location: Austin, TX
You need a puller tool. Something like this:
http://www.harborfreight.com/cpi/cta...emnumber=40966

If the Fairchild is repairable, you might want to give it a listen before trashing it. Very nice when fixed up. The arm was advanced for the day, but there are much better arms now.
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Old 3rd September 2009, 02:19 PM   #3
palasr is offline palasr  United States
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Location: Albany NY - halfway to somewhere
I'd find a machine shop with a small manual press and ask them to remove them. I took a press-fit pulley off an old Linn motor, and it took almost 2 tons of pressure to remove the damn thing - sometimes you can get lucky with a heat gun and a little tapping, but why risk damaging the motor(s).

-Richard
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Old 5th September 2009, 11:49 PM   #4
K.A.B is offline K.A.B  Sweden
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Location: Sweden
I use a soldering iron to heat up the pully in your case the capstan. Put the tip of the iron on the top of the pully and wait a minute then try to pull it of if not heat up the capstan little longer the heat will not destroy the motor. Use gloves when you try to remove the capstan it will be hot.

Good luck

Anders
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Old 10th September 2009, 05:08 AM   #5
WBS is offline WBS  Tibet
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Join Date: Jan 2007
I was thinking you could use one of those small butane lighters that you find in camping stores for starting fires in the wind. Try heating the capstan from a distance and heat equally on all sides while trying to avoid the motor shaft. If you point the shaft down and get lucky, it just might fall off.

I like the idea of using a puller though if you can find one. It's probably a safer bet.

If you don't have any use for the nylon mounting bushings and screws from your Empire motor, I could use them. Feel free to send me a PM.

Did you see what Berndt came up with for his latest Empire project? It's very cool!
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Old 10th September 2009, 12:17 PM   #6
oshifis is offline oshifis  Hungary
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Location: Budapest, Hungary
Perhaps the butane torch heating could be combined with applying freeze spray on the shaft. Freeze spray is used for troubleshooting electronic circuits.
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