[Test-Equipment] re: HP8640B gears

[Grant, Ken]

That link probably won't help. Sorry. Here's the pertinent text:

While I'm at it, I've had success with repairing a cracked delrin 
gear. Having removed the gear, put it in a refrigerator's freezer 
compartment for a few hours. This is an effort to cause the delrin to 
shrink more than the brass hub. Drift out the brass hub. Mine came out 
with just a gentle tap on a hammer and drift.(Credit the next part to 
Jeff Liebermann). Use 24 hr epoxy to glue the Delrin back together. 
Use a round file to open up the delrin centre hole so that the brass 
hub will just fit back in. Epoxy the hub back in. 
One poster has suggested soaking nylon / delrin in warm water 
overnight will restore some of it's pliability. I did this to all of 
the delrin gears. Don't know if they're more pliable, but they're sure 
nice and clean! 

Ken 

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