Gear repair

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.

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I weld a damaged tooth with an electric arc welding

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

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Result. The gear is almost new

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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

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

Quote:

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Originally Posted by Frank S

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

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Whoa! ---Joe

Quote:

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Originally Posted by olderdan

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

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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.

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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:

<div id="blocks"> <div class="block b1 pngfix"> <div class="bimg"> <div> <a href="http://www.homemadetools.net/homemade-gear-repair-method"> <img src="/uploads/201525/homemade-gear-repair-method.jpeg"/> </a> </div> </div> <div class="head pngfix"></div> <div class="left pngfix"></div> <div class="right pngfix"></div> <div class="blockover b1 pngfix"> <div class="title"> <a href="http://www.homemadetools.net/homemade-gear-repair-method">Gear Repair Method</a> <span> by <a href="http://www.homemadetools.net/builder/Vyacheslav.Nevolya">Vyacheslav.Nevolya</a></span> </div> <div class="tags">tags: <a href='http://www.homemadetools.net/tag/gears'>gears</a>, <a href='http://www.homemadetools.net/tag/repair'>repair</a> </div> </div> </div> </div>
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Very nice work.

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.

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!

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