small chip on pinion tooth

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Feb 5, 2004 | 06:25 PM
  #1  
ok i see a small chip in my pinion, on one tooth. the chip is in the valley where the tooth makes contact with the ring.

top of the pirion --head-- in the valley.

replace it? file it down??
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Feb 5, 2004 | 09:41 PM
  #2  
Re: small chip on pinion tooth
Quote:
Originally posted by SeanTimothy
ok i see a small chip in my pinion, on one tooth. the chip is in the valley where the tooth makes contact with the ring.

top of the pirion --head-- in the valley.

replace it? file it down??
Replace it...beginning of the end of the pinion tooth. Metal fatique. Get a high powered magnifying glass and you'll likely see a hairline crack starting at the chip. Virtually impossible to stop a fatique crack from forming once you get any damage in this area of the tooth.

The " root " area ( Valley ) of the pinion tooth has the highest loading. Usually when a pinion tooth fails it will fail in this area.
Will eventually just shear off.
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Feb 6, 2004 | 09:52 AM
  #3  
i called randys ring and pinion, described the chip....they said it would be ok....

who knows....i may run it, i may not....id rather NOT run it....

too bad there arent any places around here that specialize in it...id ask them...anyways heres a pic of where it is....

this isnt the actual pinion, its just a pic i grabbed off the web, and drew where the crack is

small chip on pinion tooth-chip.gif  

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Feb 6, 2004 | 09:53 AM
  #4  
another pic

small chip on pinion tooth-chip2.jpg  

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Feb 6, 2004 | 09:44 PM
  #5  
Ok...that's not in too bad of an area. Chip is at very end of pinion valley where loading is less. One thing though is important,
you stated in your second post:

Quote " this isnt the actual pinion, its just a pic i grabbed off the web, and drew where the crack is

Is it a crack or is it a chip? Important difference. If it's a crack forget about it. That tooth will fail.

If it's a chip, you can probably grind a radius where the chip is with a fine stone on a Rotary tool like a Dremel. That's what I would do. Being on the end like that, you can get at it. If it was in the middle of the root it would be much harder.
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Feb 6, 2004 | 10:01 PM
  #6  
yeah i ment chip, not crack, sorry about that
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