rainedave

My Feedback: (1)

Hi all. I have a wrist pin for an OS Max .60 H that is missing one of the wrist pin pads. I had some extra K&B .61 Teflon pads so I stuck one of those in the open end of the pin. But, it is a very loose fit and moves around quite a bit.

Will this be safe to use? I don't think it can come out while running, but I don't know for sure. Is is possible to fabricate a homemade pad out of something? Are there pads for other engines that might be a better fit?

The first photo is the open end and the K&B pad; second photo is of the intact padded end.

Thanks,
David

w8ye

My Feedback: (16)

I had to buy a wrist pin from Tower to get a pad for a FS61

Campgems

I'm prety sure they are teflon. You can buy teflon rod from Enco or McMaster Carr and turn it to fit if you have a little lathe or a friend who does. They would be easy to make.

As long as there isn't a possibility of it snagging in a port, it should be fine.

Don

rainedave

My Feedback: (1)

Thanks Don. It's a crossflow, baffle piston engine so the wristpin never passes over a port (as with Schneurles).

Do any modern 4-cycles use wrist pin pads? I'm just wondering if there's a readily available part out there.

David

carrellh

The OS 91 Surpass II uses teflon pads
http://www3.omnimodels.com/cgi-bin/woi0001p?&I=OSMG7742
The wristpin includes them. It gives a diameter. You might have to search through all of the available pins to find one that's right.

Motorboy

You can have 2 difference material for the pads: teflon or bronce. Bronce pads must be pressed into the hole while the teflon pads are lose fitted inthe hole. Some wristpins has bronce ring soldered to wrispin or has a hollowed pads pressed into the hole.

rainedave

My Feedback: (1)

Thanks everyone.

Carrell, my wrist pin is also 6mm in diameter, so I bet the .91 pads will work.

David

errie

I also had to order a new wristpin from Tower (just to get those pads)

AJsToyz

Saito .72 has a 6mm pad also

Andy

ZAGNUT

My Feedback: (1)

20 years ago i used the tip of a bamboo skewer wedged into the pin and sanded off in an OS .28 FSR. worked great, never a problem and gave the engine away to a friend who is still using it today.



dave

rainedave

My Feedback: (1)

Thanks everyone. I appreciate the help. I needed a few other odds and ends from Tower so I went ahead and threw the .91 pin in the basket.

David