"Chas" wrote in message
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"Buerste" wrote in message
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"John R. Carroll" wrote in message
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"Jerry Wass" wrote in message
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I have this nice 25 yr old Jet 1/2" drill press--has a nicely machined
Jacobs style chuck-(16mm)--a couple of years ago, it started slipping
while tightening it up. you get it fairly tight with the key,, and
then you can just keep on turning the key--w/o it getting any
tighter---although you have to turn the chuck key further than "normal"
to loosen the chuck.. Inspecting the innards doesn't reveal any obvious
defects..Do I need to clean one area & lube another???

You have probably sprung the jaws.
They are replaceable.

JC


More likely the ring gear is slipping on the body.
I think you mean the ring-gear sleeve is slipping on the nut.
--
Regards,

Chas.

(To email me, replace "xxx" with letters tango papa golf.)


Exactly. I don't see how it could be in the jaws. However, when I have a
chuck act up in the slightest...it gets replaced. All my production
machines have Jacobs chucks and we used to repair them but it just isn't
worth it anymore.