On 01/21/2017 05:30 PM, Jon Elson wrote: > On 01/21/2017 01:24 PM, Gene Heskett wrote: > You should know about the "poor man's adjustable chuck". > You leave the register diameter on the backplate a bit > undersized, and it allows you to loosen the mounting screws > and tap the chuck into any alignment you like. Note that no > 3-jaw chuck can be trusted to hold any diameter exactly > true, it always has some imprecision. So, when a critical > job come up, you clamp the work in the jaws and then adjust > the chuck to run the part true. A good chuck will then > repeat that position pretty accurately for the same diameter. > > Jon > > One thing that helps consistency is to try different pinions to get accurate chucking then always use the same pinion for that size.
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