Tractor transmission gears

Kirk-NJ

Well-known Member
I would like to get some transmission gears made. Anyone have any experience having gears made and can steer me in the right direction. Thanks

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The only economical way would be if you had a machinist friend who could do the work for a case of beer in his free time, or maybe as a youtube video.

Those are helical cut gears though. Straight cut seems relatively straightforward if you have a simple dividing head and a good mill. Helical cut means you need a higher level of tooling.
 
try gear products near chicago. they can reverse engineer your gears. its spendy tho. they do a lot of work for jay leno. heres a link
poke here
 
If you cant find a place locally Canton Gear in Canton Ohio can make just about anything. We have used them many times in the past with complete satisfaction. As the others said if you have never had custom gears made be sitting down when when asking for an estimate.
 
I guess I should have been a little clearer. I'm looking to make more than one set and I'm not opposed to changing the gearing to straight cut gears.
 
It is going to be expensive however you do it, would doubt you will ever see a return, but here goes.

I would get the parts laser scanned and have 3D model made, then parts could then be made anywhere by CNC. You will want to scan all the parts in the transmission while at it, so you can have a model built to check for interferences and tolerances.
 
There is a write up in the current edition of farm show about a guy that does exactly the kind of thing you are after.

Described as farmer friendly, loves helping people restore older equipment and willing to give anything a try to help get you going.

Lyle Mack
LM Gear and machine

Mercerville Penn

717 593-9476
 
The Germans found that out with the tiger tanks. Straight cut gears as
where the Shermans were built with automotive tooling and had helical
gears in the drive systems. Helical spreads out the strain of
trasfering power. The other problem is the tank's weight was increased
by close to a third from carriage design to production. Many Tigers
just broke down and very few were destroyed. Shermans just got blown
up. An 88 shell is huge. Now this information is what I found watching
tank restoration videos. Anyone with more information just chime in.
 
The latest models of Mitsubishi CNC Wire EDM machines have a gear tooth making program in their programming. A Tool & Die shop should either have an EDM machine or be able to steer you onto a shop with them. Very slow machining process, most shops have several machines if they have any.

Back in the old days those gears were made from steel forgings, probably machined on Barber-Coleman hobs, maybe finished/shaved on a Red Ring gear shaver, then carburized, made hard on the outside, soft for shock absorption on the inside. Today I would make them from some type of Nitralloy alloy steel, made to be hardened by Nitriding with much lower tempuratures so much less distortion, means they end up being cheaper.

In my 30+ year purchasing career I've dealt with about 10-12 shops that made gears, but having worked as a production scheduler at IH's Farmall Plant for a year right out of college, every other shop was tiny in comparison. I heard once that Farmall had the capacity to produce MORE gears by weight or number than any other manufacturing plant in the US. Those bull gears in the BIG Farmalls were Huge!
 
That gear can not entirely be made by EDM because of the small gear. The large end could be cut, but there is not enough clearance for the lower wire guide to cut the small teeth.

You don't have to measure it. Any gear shop can take that gear and measure up the teeth. That will tell them the diametral pitch and pressure angle. If it is a metric gear, it tell them the gear modulus.

I've had replacement machinery gears made here...

https://www.premier-gear.com/contact
 
A lot of guys mentioned "EXPENSIVE" ....... any guesses as to how much $$$ for both (or either one)? Might be interesting to see what people think it might cost.
 
Please post what prices you are quoted. Unless you have a set of detailed drawings of the parts, I would suspect the first set with matching gears would cost way more than the price to replace the tractor.

In factory automation we try to just modify standard off-the-shelf gears whenever possible.
 
A lot of guys mentioned "EXPENSIVE" ....... any guesses as to how much $$$ for both (or either one)? Might be interesting to see what people think it might cost.

The last machinery repair gear I had made cost $350 to have the teeth cut. It cost $60 for the heat treating (heat treater was able to batch it in with another customers job :)) I provided the material and made the blank. Customer was charged $1500 for the part.
 

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