Dismantling Chucks

[Alan Worland 1Participant @alanworland1]

I have, on occasion, pressed apart 3 jaw drill chucks for cleaning and light lubrication but have now got a couple that need the treatment with the pressed on thin metal case.

Anyone know how to get these apart?

[Alan Worland 1Participant @alanworland1]

[magpieParticipant @magpie]

Hi Alan    see link on DRILLING CHUCK QUESTIONS in latest posts.

                   cheers   Derek

[Ian S CParticipant @iansc]

There was an article in ME a few years back, and the suggestion there was take off the thin metal sleeve, throw it away, make a new sleeve on a similar pattern to the industrial chucks, ie., a type 34 half inch chuck. I can’t remember how to strip them, it may involve destruction, but with some careful work after that you’ll have a far better chuck.  Ian S C

[Ian S CParticipant @iansc]

Found it, Model Engineer vol 188. No., 4169 page352, Dismantling Drill Chucks by Sam Rhodes.

I see on the official Jacobs site that disassembly should be done with a hydraulic press, but reassembly should be with a hammer, also the Jacobs taper shaft should be sdriven in by hammer rather than a press.

The article shows how to strip the thin walled type. Grip a steel bar in the chuck, grip this in the vise. About 10mm back from the gear end, cut right round with a fine tooth hacksaw, then cut the remaining narrow band, and it will spring open, you’v then got to make a new shell. It would be worth getting a copy if you could. Ian S C

[Alan Worland 1Participant @alanworland1]

Thanks for your advice! What a performance, I take it the thin sleeve is pressed on for final assembly.

Hmmm, not sure if they are worth the bother, might just put them in the ultrasonic tank to shake the muck out, then give them a squirt – they are only cheapo chucks as used on your standard electric drills

[Ian S CParticipant @iansc]

Your proberbly right Alan, they are a modern throw away item, but if you have nothing else i suppose beggars can’t be choosers. I think the sleeve is crimped on to the gear ring, and the suggestion is to glue the new sleeve on. I find that those chucks don’t, in there origional form grip too well. I remember getting a new Black and Dekker 1/2″ drill, and I was trading in the old one, the sales man took the chuck from the old drill and said, here you’ll need this, the one you just bought is cr*p. Ian S C

[Alan Worland 1Participant @alanworland1]

Thanks Ian, We are all being encouraged to recycle everything then someone designs something like these! I have several spare ‘proper’ chucks laying around – but none with the right thread! I suppose one could be adapted to fit, but I will give it the ultrasonic treatment before I do.

[Ian S CParticipant @iansc]

I don’t know if its economic, but it is possible to buy new jaws a nd new split nuts from Jacobs,  but I suspect to ones like us, if it gets to that stage, its a new chuck.  Ian S C

[Spencer BrookParticipant @spencerbrook26722]

 Alan,

 There are also articles on dismantling and cleaning Jacobs and Jacobs type chucks at MEW Issue 22 p26 (by D Cooper) and MEW 59 p17 (by B Morris)

 Hope these may help

  SEGB

 

 

[Author]

Posts