Replacement gear for wiper motor (1 Viewer)

[mbplace]

Doing some work on my wiper motor and the gear appears to be stripped. Does anyone know where I can find just a new gear? Everything else in the motor is in great shape, I flipped the gear and it’s working for now but I doubt it’ll last. it’s a 77 FJ40

 

[Engineer8000]

Is it possible the RHD wiper motor has the same gear?

 

[mbplace]

Is it possible the RHD wiper motor has the same gear?

Just looked it up — very similar but missing a few key components

 

[71cruiser71]

This is the problem with one of mine, the plastic gear has teeth broken. I was considering hiring someone to 3D print one for me

 

[sogncab]

I was considering hiring someone to 3D print one for me

That was my initial thought if one can't be sourced new.

Gears have a lot of tricky math to them as far as the geometry goes.

 

[Malleus]

These gear teeth are too small (the load and speeds are too) to worry about a perfect involute form. Printed gears would work fine, as long as the material held up under load. From the wear, I would think the original material was Delrin, or something close to that.

A commercial supplier like Boston Gear might be able to provide a blank. You'd likely have to size the bore and provide the square cutouts yourself.

And I would think this is a metric gear. You can verify that by comparing the teeth with a gear tooth profile gauge. They're pretty cheap; just a sheet metal gear profile (actually several, like the thread pitch gauges).

 

[Scota4570]

A competent machinist could make that on a milling machine. It s called gear hobbing. There is a person on this forum who is knowledgeable and helpful regarding wiper motor problems. He may have a spare. I am a bit surprised he has not chimed in.

 

[Green Bean]

I believe that the fellow that you are looking for is: @thundermcawesum He knows all things wiper motor related.

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[thundermcawesum]

You know, super weird this just came up.
I only work on earlier motors and have no parts for later ones, but I actually think I can help here.
I was just looking into fixing these the other day with superglue and baking soda.

I am skeptical, but I have seen supporting evidence elsewhere on the internet that the glue and baking soda react to form a much stronger bond.

 

[Coolerman]

I have used Super Glue and baking soda to repair the nut on an old Gibson acoustic guitar. When it hardened, I was able to use a needle file to re-cut the string groove.
It has held for years...