jrbbikerx

Does anyone know which bearing would fit in the hull opening of an Abrams to support the driveshaft?

i know the bearing Id is 8mm, but what about the outside size?

looking to support the sprocket shaft as it seems to deflect a lot under normal use and may cause excessive wear

Roboticus_Prime

There's this.

http://www.rctank.de/USM1A2-ABRAMS_5

jrbbikerx

I did see this but my gut tells me I can just buy a flanged bearing or bushing for like $1.50 online.

i know the ID is 8mm but what about OD and height...

thanks

Roboticus_Prime

I don't know the exact dimensions, and I won't have time to measure until I get back from vacation next week.

My Abrams does the same thing, and throws tracks.

jrbbikerx

I think throwing a bearing around that shaft so it doesn't move fore and aft will help everything work better, not to mention limit wear on gearbox.

the one from Germany for 17€ is well and good but I think a much cheaper yet as effective solution can be had.

get a flanged bearing and just epoxy it in place and you're all set.

im going to hit Home Depot this week and see what they have. Will report back.

Roboticus_Prime

I'm also going to reinforce the motor mounts to help keep them in place.

Tanque

I believe a bronze bushing would be better. Many ball bearings deflect quite a bit; many are designed
to run at a higher temperature( where the materials expand and clearances become less) than will be achieved in a model tank.
Bronze ( or even brass) bushings may be longer and support the output shaft effectively; very likely cheaper.

Jerry

philipat

OD doesn't really matter unless it exceeds the hull space. Just drill the hole bigger around the existing shaft hole.