Seaturtle
Plastic
- Joined
- Jan 24, 2020
- Location
- Memphis, TN
Solved: Senior machinist set it right, it was 5/16 24. The welder was way off guessing 1/4 24 and I was closer but still incorrect with M8x1.
TLDR: crossthreaded hole on a french airplane wheel. Metric bolt reads 7.6mm (0.299) with 24 tpi. Best core diameter read we got was .276 in. He's planning to use a 1/4 24 tap to try to right it. Is this correct?
I was asked by my welder coworker to look at a cross-threaded part of an airplane wheel. The bolt that fit the measurement was 24 in pitch, 0.309 in diameter or 7.6mm since it's a French part. The print he has shows no proper information on the dimensions of the hole or the bolt's size/tpi.
We ran into issues looking for a tap/drill chart that would include a 7.6/0.299 measurement tap so instead of risking a 8x1 tap with an estimated 26 tpi, .315 metric tap, he's going to go with the path of least resistance and use a 1/4 24 tap and clear out the core diameter at least.
My question is, will this be enough to clear the cross-threaded hole? I thought the thread diameter is the part that fixes a cross-thread. Are there any other options we may have forgot to consider?
TLDR: crossthreaded hole on a french airplane wheel. Metric bolt reads 7.6mm (0.299) with 24 tpi. Best core diameter read we got was .276 in. He's planning to use a 1/4 24 tap to try to right it. Is this correct?
I was asked by my welder coworker to look at a cross-threaded part of an airplane wheel. The bolt that fit the measurement was 24 in pitch, 0.309 in diameter or 7.6mm since it's a French part. The print he has shows no proper information on the dimensions of the hole or the bolt's size/tpi.
We ran into issues looking for a tap/drill chart that would include a 7.6/0.299 measurement tap so instead of risking a 8x1 tap with an estimated 26 tpi, .315 metric tap, he's going to go with the path of least resistance and use a 1/4 24 tap and clear out the core diameter at least.
My question is, will this be enough to clear the cross-threaded hole? I thought the thread diameter is the part that fixes a cross-thread. Are there any other options we may have forgot to consider?
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