4 Jaw Chuck Basic use

[@steveclark..]

That's similar to how I do it, take a reading at each jaw and the opposite one. Others talk about high and low readings, halving that, setting the pointer to 0 etc but when the dial indicator spins round more than 360 for example, how do you work out what's the high and low points to start with?? If round stock will fit in my tailstock chuck, I use that to hold the part in place, then wind each of the 4 jaws close around it just to get somewhere close. Hoping that the dial gauge doesn't rotate all the way round at least.

[@moosesmachinery]

They are all basically the same method, explained differently. I get it close by eye initially (like the old timers using a surface gauge and scribe). Mitutoyo has a nice counter that shows the number of revs which is a God send for when you are really far off!

[@andyc8454]

Thanks for video. I have the same lathe as you but it’s a central machinery. Mine doesn’t have a sight glass in the carriage. I am going to add one and was wondering if you could measure yours for me? Thanks Andy

[@moosesmachinery]

What do you want me to use as a datum? And metric or imperial

[@andyc8454]

@@moosesmachinery Awesome. metric is fine. Maybe up from the bottom of carriage to center of sight glass and from the right side of carriage to center of sight glass. Thanks

[@moosesmachinery]

@@andyc8454 I'm sorry, I got very ill with covid and haven't been out of bed in a week. I'll take measurements when I'm up and about

[@moosesmachinery]

@andyc8454 it is approximately two inches in from the right side of the case and 1 and 5/16 from the bottom. I could not find my metric rule. I'd fill to mfg stated capacity ans then mark it. Your case may be different than mine but this should get you close.

[@andyc8454]

Thank you very much! Very appreciated. Hope you are feeling better.