stunthanger.com

Engine basics => Engine set up tips => Topic started by: Mike Greb on July 06, 2020, 06:57:13 PM

Title: Replacement wrist pin pads
Post by: Mike Greb on July 06, 2020, 06:57:13 PM

I am working on  a motor that has  plastic wrist pin pads that are worn out.    What would be a good material to make replacements from?  I am thinking about using delrin (Acetel) , but I was wondering if there is something better. The liner is an ABN

Title: Re: Replacement wrist pin pads
Post by: pmackenzie on July 06, 2020, 07:00:38 PM

Teflon is higher temp than Delrin.

Title: Re: Replacement wrist pin pads
Post by: Mike Greb on July 06, 2020, 07:07:44 PM

I just looked on the mcmaster-carr website and they list  PTFE rod that has a temp rating up to 500f .     

Title: Re: Replacement wrist pin pads
Post by: pmackenzie on July 06, 2020, 07:11:26 PM

Teflon is very easy to machine, much like Delrin.

Title: Re: Replacement wrist pin pads
Post by: RandySmith on July 07, 2020, 03:36:45 PM

Use  either one,  they both work OK

Randy

Title: Re: Replacement wrist pin pads
Post by: Dave Hull on July 07, 2020, 10:26:09 PM

I have used the PTFE from McMaster. It is very soft. Once you turn the diameters, just slice it off to length with a good Xacto. Much better than trying to part it off. If you use nylon, use the Delrin, not 6/6 or the like. The Delrin machines mucho betterro.

Of course, if this is all old news to ya, forgive my comments, Big Mike!

The Divot