FREE needle bearing spacers 4 high RPM

[Jayraye39]

Anything will work that will fit good and is strong enough. But you want one per side if you can. the more washers you have to use the more pieces you have that can fail. Plus you want something light weight steel is just to heavy to make a diff is you want higher rpm

The thickness you want is 1/8 inch or 3.175mm on each side

 

[darwin]

Ever see a brass/copper rivet, or flat piece crack/split on the edges when hammered? Lots of hammering going on with that piston/forces. Maybe?

 

[ImpulseRocket]

I am just curious if anybody has given a thick flat washer a try with this.

There are some interesting options out there that are around 2-3mm thick.

These guys are 2.8mm thick, so only a tiny bit undersized, but would be fairly light weight and maybe worth a shot. https://www.probolt-usa.com/aluminum-drilled-washer-m10-20mm-od/

 

[DieselTech]

I dont really see the need for the spacers on the rod. But arbor shims in all sorts of materials & thicknesses can be obtained. Here is some stainless shims from McMaster's carr. Just a couple examples in packs of 10. They are cheaper than I thought they would be. These are 10mm ID. 16mm OD.

 

[cdeuce1988]

Get rid of the side to side slop that is present on the wrist pin and needle bearing. This will reduce vibration, increase the life of the needle bearing, and allow higher RPMs. trying to find the right materials to use and trying to find the right size was a challenge. Didnt want to buy anything so what I did was took an old piston that was laying around. i took snipps and broke the transfer sides of the piston off exposing the inside of the piston.
View attachment 186153 I then got a blade from a hack saw and by hand gently and evenly cut 1/8th inch off of both side of the wrist pin sleeve inside the piston.
View attachment 186154 This will make two 1/8th inch washers that will fit perfectly on your wrist pin. 1/8 is the perfect size to keep the needle bearing centered with no slop. If the needle bearing doesnt move easily when you roll your finger across it. Then its to tight and you will have to file or sand some material off your washers.
View attachment 186155
When installing the washers put the cut side touching the bearing. This DIY is free and works perfectly for this application. Not including tear down and rebuild. It only took me 1hr to accomplish this. This is how good they fit.
View attachment 186156
LIKE I SAID MAKE SURE THE WHOLE BEARING CAGE AND NOT JUST THE NEEDLES CAN EASILY ROTATE AROUND THE WRIST PIN. REBUILD THEN HOLD IT WIDE OPEN.

Interesting creativity.

 

[Jayraye39]

Interesting creativity.

been almost 8 months and 500 miles since I did this modd and i would like to report the washers are the same as the day i put them in. no cracks, and no shavings in case. the best FREE mod for spacers by far. key word is FREE

 

[GW's Motorized]

been almost 8 months and 500 miles since I did this modd and i would like to report the washers are the same as the day i put them in. no cracks, and no shavings in case. the best FREE mod for spacers by far. key word is FREE

Exactly. Why pay for somthing that takes you a few minutes to make with your scrap parts?

 

[Chainlube]

We used to call them thrush washers.