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techtalk:ref:tools023 [2020/05/28 17:51] hippysmack [Chasing Threads] |
techtalk:ref:tools023 [2022/01/18 01:49] hippysmack [Using taps / dies to chase debris out of the threads] |
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| And chasing them with standard size taps / dies simply widens that clearance to standard sizes. \\ | And chasing them with standard size taps / dies simply widens that clearance to standard sizes. \\ | ||
| - | **Standard tap and dies** have sharp cutting edges. \\ | + | **Standard tap and dies** have sharp cutting edges. \\\ |
| - | If the threads have not been warped or damaged; \\ | + | If the threads have not been warped or damaged, a die will cut through and remove sealants on bolt threads. \\ |
| - | A die will cut through and remove sealants on bolt threads. \\ | + | Likewise, a tap will cut through and remove grime and dried up sealants in the existing threads. \\ |
| - | Likewise, a tap will cut through and remove sealants on hole threads. \\ | + | There are some holes, however, that are purposely tapped undersize at the factory. \\ |
| + | Running a standard tap in those holes opens the holes up. | ||
| + | (also the low quality taps from the do-it-yourself store are not held to the cutting tolerance that real ground thread H or L limit taps possess) \\ | ||
| + | |||
| + | * Some factory undersize tapped holes on 1957-1976 motors: ((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1888378&page=6)) | ||
| + | * Oil pump studs | ||
| + | * Cylinder base studs | ||
| + | * Rear motor mount studs | ||
| + | * Tool box stud | ||
| **Roll form tap and dies** have rounded cutting edges. \\ | **Roll form tap and dies** have rounded cutting edges. \\ | ||
