Pozilok chuck servicing

[AcrosticusParticipant @acrosticus]

How is the back centre (blunted on mine – by previous owner, not by me!) removed from the chuck body.
I assume, since it has two flats, that it is screwed in? Is that right, and if so is it a normal RH thread?

The allen grub screw which I assume is supposed to engage with one of the flats to hold it in place has not been engaged, so if screwed in it is now well jammed. I intend making a special spanner of 22mm dia steel bar with a 10mm wide slot in the end, in the hope of unscrewing it so that I can renovate the point, so would appreciate knowing that I am going in the right direction.

Thanks in anticipation!

Regards

Tony

[AcrosticusParticipant @acrosticus]

[AcrosticusParticipant @acrosticus]

Well, no answers from here so far, so I took a chance on it, made the necessary special tool and successfully removed the centre point which was a lot more stuck than I had expected, So, point re-machined and chuck is back to normal again.( I wish the rest of what I did today had turned out as well as that!)

I've come to the conclusion that the allen screw is only there to stop the collet rotating, and not to hold the centre point.

regards

Tony

[Neil WyattModerator @neilwyatt]

Hi Tony,

To help anyone who comes after, was it a right or left hand thread?

Neil

[AcrosticusParticipant @acrosticus]

Hello Neil,

It's a right hand thread, 3/8" BSW or 10mm – I didn't check the thread type.

To remove it you need a tool like this special, which I made from a piece of 22mm dia bar about 60mm long.

The slot is a clearance 10 mm wide and the centre is recessed with a 10mm centre drill to clear the point inside the chuck. The two flats on the other end were gripped in the vice , with a spanner used on the flats of the chuck.

Hope this helps, anyway,

Regards

Tony

[Neil WyattModerator @neilwyatt]

Thanks,

You should enter that for the MEW Tip of the month

Neil

[AcrosticusParticipant @acrosticus]

Thanks Neil, I'll do that.

Regards

Tony

[Neil WyattModerator @neilwyatt]

I see you have

Neil

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