Reply by Wildwood

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Posted on How much head stock runout is acceptable?

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2556 posts in 2406 days

#1 posted 07-26-2014 11:19 AM

Welcome to Lumberjocks! Probably just the wood you are turning wood does move while we turn.

If have no play in the spindle (worn bearings) check for run out without chuck mounted see what you have. I stick dial indicator just inside the spindle to get a reading. (see Johnny cnc video below) Then add the chuck and measure again. Not uncommon to see a little movement as you add components in or on the headstock spindle.

You want to measure body of the chuck and not the jaws. Whether you pay a little or a lot woodturning chuck jaws can and do flex a bit due to wood movement while turning.

If you had a bad thread adapter (insert) would have problems regardless size of the wood you turned. Since only see a problem with large heavy blanks do not think there is a problem with your threaded insert. If makes you feel better, take it out and reinsert it.

Teknatool does recommends and provides chuck disassembly and cleaning instructions. They do not provide a time table to do this, so unless having problem with opening & closing chuck jaws would not do it. I found using compressed air cleaning my Oneway chucks gets rid of dust build up.

This Jonny CNC video geared toward pen turners demonstrates how to measure run out. Principals the same for headstock spindles and components we add.

-- Bill

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