New 3 jaw

[Jack AcresParticipant @jackacres62305]

Greetings, I have recently bought a new 3 jaw chuck for my ML 7, from an well known company that advertises here, I'm finding that it has about .15 mm run out front to rear, the back plate and headstock all indicate true,there is no material between the backplate and the chuck, jaws are clean, if you indicate close to the backplate, I get a 0 reading, but just behind the jaws, and anything in the chuck has the run out. Can anyone here point me in a direction to fix this? I live in NZ and freight out here is very expensive,

Cheers, Jack

[Jack AcresParticipant @jackacres62305]

[HopperParticipant @hopper]

Talk to your supplier. They should pay the shipping on a replacement if item is not fit for purpose — which 0.15mm would seem to indicate.

Providing of course you have machined the backplate in situ on both the face and the locating spigot diameter to get all running true both radially and axially.

Also presuming spigot is correct depth with clearance so mounting faces meet correctly and there is a clearance chamfer on spigot recess so it is not riding on the tool radius at base of spigot.

Pics of your set up would help.

 

Edited By Hopper on 31/03/2020 05:55:03

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