View Full Version : Gears
11-16-2002, 03:39 PM
I want to make a planetary gear reduction for my pulling tractor..need help with source of gears, material selection, strength required, ect..Meanwhile I would like to build a model so need source for inexpensive small gears of about 24 pitch, 17 to 26 tooth, 60 tooth internal. Thanks, Seb.
11-16-2002, 03:48 PM
I don't know about the planetary gearsets, however have you checked out Small Parts inc.
log on to www.smallparts.com (http://www.smallparts.com) and get a catalog. You will find other uses for it anyway. They cary a lot of hard to find small parts, gears bushings and the like..
I'm hazy on this, but isn't there some kind of planetary gearing in an automatic transmission? If so, the parts might be adaptable and a blown tranny ought to be pretty cheap.
11-16-2002, 08:28 PM
What sort of pulling tractor? modified garden tractor? fire breathing, earth shaking, fuel burning, multi engine monster?
somewhere in between?
Anyway, lots of agricultural machines use planetaries in a range of sizes for final drives etc. You may be able to find something that you can adapt to your requirements at an ag wrecking yard.
11-17-2002, 07:21 PM
Look for a planetary axle in a truck wrecking yard or off a big 4x4 tractor - can't miss them - they have large diameter hubs. Much cheaper than screwing around.
11-17-2002, 11:23 PM
I own a small machine shop specializing in custom gears. I have gear cutting machinery, and if I cannot make a gear,then I have a relationship with a larger shop that can. If you can you need to be more specific about the driver, the planitary gears and,or the internal ring gear.
11-24-2002, 02:29 PM
Excuse me for interrupting your thread momentarily, Speedoo...
John? Calling John Stevens...Attention, please.
A while back, you wrote a two-part article on gear cutting. I just found the first part, about single & fly cutters, but the second part about hobbing seems to have disappeared. Do you know where I can find it?
Sorry folks...thanks Speedoo.
12-04-2002, 03:41 PM
For model try a Model T Ford steering column it has a planetary gear in the top just under the steering wheel About 4" OD and is a 4 to 1 reduction with 5 to 1 in the later models. See a lot of these parts at swap meets.
01-18-2003, 11:05 PM
A Massey Furgeson 135 tractor has external planetary gears and housings.Tractor salvage yards are the place to look.