Keyless Chuck Repair

[f350ca]

I was gifted this keyless chuck by a friend, it had been sitting a long time and was stiff, I tried washing it out with WD40 then giving it a generous flood of light oil. Helped a little but is getting stiffer as I use it.
Think it needs to come apart for a through cleaning and possible derusting.
Searched the net for instructions on disassembly, but found nothing.
The ring at the top comes off, had it off it to use wedges to change the JT shank for this R8
Its a Metabo Futuro 3-16
3 to 16 mm or 1/8 to 5/8 capacity
Anyone know how to get it apart before I start pressing in the wrong spot,


Thanks

[DaveH]

Hi Greg, I have a couple of Albrecht drill chucks and the knurled bit in the middle just screws off. I say just screws off you may need to use a strap wrench on the knurled bit and a 'V' block in the vice to hold the body.
It is best done with the jaws full open or fully closed sorry Greg I can't remember for the life of me - so try half way.

DaveH

PS According to the Jacobs repair that Ed posted the chuck jaws need to be fully closed.

[EdK]

Greg,

Here are a couple of sources that might help.

http://www.jacobschuck.com/precision-chuck-repair.asp
http://www.machinistblog.com/rebuilding-...ill-chuck/

Ed

[dallen]

you may be able to put it in the mill spindle and lock the break if it has one, then like DaveH said use a strap wrench to break the thread loose on the drill chuck body by putting it around the large knurled area, once loosened remove from the mill and finish unscrewing while holding it over a large towel or in a pan as there is about 30 small steel ball bearings in it, AND you don't want to loose one of them,

DA

Check the manufactures website they probably have instructions.

DA

[krv3000]

hi did i not do a post on haw to dismantle one of thees you need two things 1 a set of soft jaws for your vice 2 sum thick leather hold the bottom part of the chuck in the vice the bit with the writhing on then rap the leather a round the knurled part of the chuck you can use a pipe wrench or i used a Chan type oil filter removing tool then unscrew be cerful as their is ball Bering's in side and they go all over the place

[f350ca]

Thanks guys!!!!! Best to ask first, I was ready to start pressing, didn't expect it to be threaded together.
Great links ED
Bob, thought the post you had was on a keyed chuck that gets pressed apart, but could be wrong as usual.
Thanks again
Greg

[DaveH]

Greg,
Well pressing it apart would have certainly sorted it out

DaveH

[f350ca]

Took some time and tore the chuck apart. Was dry, especially where the bearings are. Cleaned it up and lubed it with CV joint grease. Its better but still not silky smooth. My try some lapping compound on some of the mating surfaces.
Saw the little pin between the threads and the part the jaws run in. It wouldn't drive through so I drilled it out only to find it was just there to register the parts when they slide together. DUH