Attempting an idler gear broken tooth repair.

Of the few parts that required replacing on my recent SB 13 rebuild (aside from a blown capacitor on the motor), only one part was actually broken, a missing tooth on the idler gear. All other replacements were from wear. A search for a replacement idler, here and on theBay, turned up nothing, so a DIY repair was necessary. A single tooth was salvaged from an old damaged Bull gear, carefully cut and sized to fit snugly into a matching slot in the idler. A small copper shim was inserted on one side to properly space the "implant" and prevent it from moving during the brazing process. A friend did the actual brazing. After cooling, the area was cleaned up using an angle grinder and file to restore the proper shape, a light buff with a wire wheel took off any sharp edges. During a brief test run, a very mild "thud" was heard, a quick tweak with a file corrected that. I'm very pleased with the results, wouldn't hesitate to do it again if necessary.
Hope this encourages someone to give it a shot.

Raydel

Raydel said:

Hope this encourages someone to give it a shot.

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Nice job but how come you didn't just get one out of the Boston Gear catalog ? Price too high ?

Because it is 14DP and Boston does not make them?

kitno455 said:

Because it is 14DP and Boston does not make them?

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That answers that question, thanks Good thing I have a 14dp shaper cutter ...

Coulda sworn someone did tho ... Browning ?

Similar - looks like yours is the better idea - and certainly for non restricted inner details versions - like not much "wall" thickness

* Fix L&S Crossfeed Clutch Gear

have fun

Wow that's beautiful workmanship! Thanks for sharing! I'll have to file that one away in the "bag of tricks"....

pavt said:

Wow that's beautiful workmanship! Thanks for sharing! I'll have to file that one away in the "bag of tricks"....

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I would file it in the same bag if only I had to skill to do it! This trick would be a way to make a damaged gear a destroyed gear in my hands. Good job it looks great

Great job on the repair. Most of the time, I have seen people just braze up the void, and then re-cut on a dividing head.

Nicely done, neat repair. Thanks for sharing.

PS: Don't throw out that "donor" gear. Other PM members may need tooth transplants also.