Suggestions for repairing HP tape drive capstans?

r.stricklin bear at
Sun Apr 18 13:28:07 CDT 2010

On Apr 18, 2010, at 10:34 AM, Tony Duell wrote:

> the overall diameter of the tyre is perhaps 18mm (it's going to be  
> hard to measure, sure the fact I don't have a
> solid one :-()

I put a micrometer on the capstan in my 9145A. It had turned to goo,  
but not melted yet---so it was intact, but difficult to measure  
without deforming. I got a reasonably accurate measurement off it.  
Based on experience, this should be close enough to affect a workable  
repair (though I haven't gotten to actually doing the repair yet).

	HP 9145A 36 Track		< 0.800"

That should be read as "just under 0.8 inch."

It was actually harder to clean all the melted capstan residue off the  
motor spindle than it was to measure it in the first place. It gets  


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