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  #1  
Old 02-07-2018, 04:01 PM
jimgreen jimgreen is offline
 
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Default Drilling 7/8" hole in UHMW

Next up is making said holes in F-8115 thrust washers.
What method gives the nicest holes? A carpenter's hole saw may not be accurate or pretty.
Couldn't find any reference to this.
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  #2  
Old 02-07-2018, 04:22 PM
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wirejock wirejock is offline
 
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Default Forstner

Quote:
Originally Posted by jimgreen View Post
Next up is making said holes in F-8115 thrust washers.
What method gives the nicest holes? A carpenter's hole saw may not be accurate or pretty.
Couldn't find any reference to this.
I would use a Forstner bit. Whole set from Harbor Fright is pretty cheap.
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  #3  
Old 02-08-2018, 12:06 AM
jimgreen jimgreen is offline
 
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Thanks Larry. Don't have a HF here but will look at mail order.
Will also try out a step drill bit on some scrap
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  #4  
Old 02-08-2018, 04:08 AM
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mike newall mike newall is offline
 
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Home Despot flat whiz bit would work. Make sure the piece is securely anchored else it will tour the shop !

https://www.homedepot.com/p/Bosch-Da...5010/203274429
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  #5  
Old 02-08-2018, 08:29 AM
David Paule David Paule is offline
 
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Depending on the thickness of the part, a hole saw might work pretty well. You know, one of those things that looks like a cylinder with teeth at the end.

Dave
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  #6  
Old 02-08-2018, 08:37 AM
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I've found spade bits do a beautiful job on UHMW. Just feed it slowly.
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Last edited by Mel : 02-08-2018 at 11:11 AM.
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Old 02-08-2018, 11:10 AM
jimgreen jimgreen is offline
 
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Thanks guys, I'll test out a spade bit first. Path of least resistance etc.
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  #8  
Old 02-08-2018, 12:06 PM
scsmith scsmith is offline
 
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Default Where?

where do these thrust washers go? I don't remember making these.
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  #9  
Old 02-08-2018, 10:05 PM
jimgreen jimgreen is offline
 
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They are applicable to the ground adjustable rudder pedals. I don't know about the other style pedals.
They fit on either end of the shaft that the pedals hinge on. It's a strange use of the term as there is no lateral force.

BTW the spade bit worked out great. Quick, easy and I didn't have to buy anything.
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Last edited by jimgreen : 02-08-2018 at 10:07 PM. Reason: added comment
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