Cardinal Mark 2 Drill chuck

[Tom LarkinParticipant @tomlarkin42293]

I recently got a Cardinal mark 2 drill chuck in poor 'visible' condition and I need to dismantle it to clean. Anyone got any experience of doing this. There is a series of small holes around the back of the chuck as well as 2 small slits on opposite sides near the back. All advice appreciated.

[Tom LarkinParticipant @tomlarkin42293]

[Neil WyattModerator @neilwyatt]

Drill chuck that dis-assemble usually have the two outer parts a force-fit together. There was an article in one of the magazines years ago.

…

July 1999, issue 59, p.17 Bill Morris (still a contributor) 'Cleaning a Jacobs Chuck, basically take off the arbor, then make a tube a close fit around the back that will press against the knurled ring you turn to do up the chuck. Squeeze in a vice until the ring and circular gear pop off. Won't work with newer chucks that have a pressed steel ring.

Neil

[davebParticipant @daveb17630]

I'm fairly sure the Cardinal chucks are screwed together, it's a superior version of the thing that came with the Stanley hand drills. They work well though! Ultrasonic tanks are good for cleaning chucks, or stand it jaws down in a tub of white spirit, giving it an occasional stir. Amazing how much goop comes out of them.

[Tom LarkinParticipant @tomlarkin42293]

Just discovered how to add photos which may clarify the type I have

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Tom Larkin on 22/01/2017 20:46:10:

.

So you might find this useful: **LINK**

https://worldwide.espacenet.com/publicationDetails/originalDocument?CC=GB&NR=651588A&KC=A&FT=D&ND=3&date=19510404&DB=EPODOC&locale=en_EP

MichaelG.

[Tom LarkinParticipant @tomlarkin42293]

I think I have sorted this. I checked out the patent (google is fantastic) and all details are there. The following is the extract!

651,588. Chucks. BROOKE TOOL MANUFACTURING CO., Ltd., and SHARP, B. July 29, 1948, No. 20204. [Class 83 (iii)] The jaws 19 of a bevel-. closing chuck are slidably mounted in non-circular slots formed in the exterior of a body 10, the outer surfaces of the jaws slidably engaging the inner conical surface of a collar 16 which is formed separ. ately from the body 10 and rigidly secured thereto by means of dowel pins 18, and the jaws are connected to an annular ring 25 which is displaced axially by means of a screw-threaded rotatable sleeve 28 having a locking ring 32 detachably secured thereto, so that when the ring 32 and sleeve 28 are detached, the ring 25 and jaws 19 can be removed without disturbing the relative positions of the collar 16 and body 10. The ring 25 is provided with dovetail grooves or bayonet slots, each engaging a correspondingly-shaped part on a chuck jaw, and the inner end of each chuck jaw engages a flat face 23 on the ring 25. The sleeve 28 may be rotated by hand or by means of a hand-operated key having bevel teeth engaging bevel teeth provided at the lower end of the sleeve. The latter bevel teeth may be formed on a separate annular member detachably secured to the sleeve in which case the locking ring 32 may be formed integrally with the adjacent end of the sleeve. The locking ring 32 may be detachably secured to the chuck body. In a modification, Fig. 5 (not shown), the inner end of each chuck jaw is of part cylindrical shape to have line contact with the ring 25.

[Tom LarkinParticipant @tomlarkin42293]

Thanks Michael, just saw your post after I posted the above.

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