Gear repair

[Vyacheslav.Nevolya]

Hi. Sometimes it's a very unpleasant situation when it's impossible to quickly find a new gear. I decided to restore the gear, maybe this is not the best way, but for some time it should work.



I weld a damaged tooth with an electric arc welding



Then after 10-15 minutes of working with this tool)))



Result. The gear is almost new

[olderdan]

Another brilliant exercise in resourcefulness, well done.
I would be interested in why such robust gears got damaged, I seem to remember they were from a motorcycle gearbox.
Regards
Olderdan

[Frank S]

Good job, nothing wrong with the method.
I used to have to sit for hours and sometimes more than 2 or 3 days at time building up the worn teeth on 3 and 4 ft diameter gears for oil field equipment then spend days as in several hand grinding the profiles of the very large teeth to some semblance of what I thought the original profile should be. A 150 lb 20 tooth pinion gear was bad enough but the 2000 lb ring gear for a 30" rotary table meant a minimum of 100 lbs of electrodes

[j.bickley]

A 150 lb 20 tooth pinion gear was bad enough but the 2000 lb ring gear for a 30" rotary table meant a minimum of 100 lbs of electrodes

Whoa! ---Joe

[Vyacheslav.Nevolya]

I would be interested in why such robust gears got damaged, I seem to remember they were from a motorcycle gearbox.
Olderdan

Gears from a motorcycle and a car. The reason for the breakage is very simple, There was a nut in the gearbox, it hit the tooth and locked the gears.

[DIYer]

Thanks Vyacheslav.Nevolya! We've added your Gear Repair Method to our Miscellaneous category,
as well as to your builder page: Vyacheslav.Nevolya's Homemade Tools. Your receipt:

Gear Repair Method by Vyacheslav.Nevolya

tags: gears, repair

[jcorpx]

Very nice work.

[VinnieL]

Years ago I had a steering gear in a collector I.H. Cub tractor with a broken tooth. This was before I had a welder etc. Took it to a machine shop and that was how they fixed it. It outlasted the rest of the tractor.

[owen moore]

Vyacheslav, I have done a similar repair job on a big lathe years ago. But friend, I have to tell you, that you are a recycling sorcerer! You can turn a sows ear into a silk purse. I have worked with Russians and Ukrainians and you people are some of the most resourceful people I have ever met!

[old kodger]

I also have played this gig, one tooth missing on the main drive gear of an 8 foot gillotine, 3 feet in diameter and 4 inches wide, cast steel, the teeth were half inch thick at the root so i drilled and tapped a row of holes , screwed in mid tempered (grade 5) bolts welded them all together then reprofiled the tooth. I heard from another employee that it was still working long after I left the company