Gear coating

[Thorp]

Hi guys,

This may have been discussed at length before but is it possible to get the moly coating on gears reapplied?

I have a cooper s gear that has a chip in the coating.... Maybe easiest to buy a new one ?

Thanks

[mk1]

I am not aware of anyone offering a recoating service on old gears.

[ianh1968]

Isn't the "coating" just a very tiny amount in thickness?
(Or am I just being a LOT thick?).

The gears will surely be case-hardened and any visible chip would remove this,
as well as any coating.

I am not so sure that re-coating would have any benefit for "chipped" gears.

Ian

[Jack of all trades]

He talking about the coating where the synchromesh ring fits the gear. That gets chipped or worn over time.

[ianh1968]

Thanks, Jack - On this forum, you learn something new every day...

Ian

[rich@minispares.com]

if its just a chip I wouldn't worry too much about it

I just use a small file / oil stone and remove the sharp edges where the missing bit has broken off. I then check the cone with a worn baulk ring (so it slides easy) and some blue just to make sure that the moly around the visible chip hasn't started lifting away.

its a shame to just throw a gear away for a small chip if the synchro teeth are in good order, once the box is running the baulk ring wont be concerned about a missing bit of moly, the surface area is so large that the baulk ring will still centre and grab whats left

[Spider]

Here's one place that does them;-

http://www.polydyn.com/

Yes, in the US, but don't be put off by that.

Also, ask around some Gunsmiths, fairly common process used there.

Before getting something done, ask them to show you a similar product that's been done by them on a similar base material. There are coaters and there are coaters

[69k1100]

http://www.metcoat.com/molybdenum-disul ... atings.htm

Now, I'm not sure exactly what BMC used on the mini syncro cones, but these guys may have an idea and a solution.