keyless chuck dismantling

[Ady1Participant @ady1]

I have a cheapo drill with quite a nice keyless chuck but it has a lot of runout (which some are mistakenly calling bearing issues) so I decided to take a peek

If you haven't done one before they can be a bit of a mystery, a proper rohm will set you back 100+ but these chinese knock offs are probably made for a fraction of the cost

They screw on with a right hand thread and can be unscrewed as below

You need quite a thin spanner to get at the drill spindle

Then do the back collar, a hex grub screw in this case

and the plastic bit pops off with encouragement

Getting the hood off can only be done one way, with the hood UP

I tried with the hood in the vice and the vice pressure basically locks the hood to the main body

So this way only

There were flats already on the rear body so it went into the vice

and something for the hood

and it cracked straight off, some loctite had been used during assembly

Edited By Ady1 on 21/03/2021 10:33:20

[Ady1Participant @ady1]

[Ady1Participant @ady1]

The rest of it is pulls apart with your fingers over a clean towel

There should be at least 25 loose bearings, mine had 23 and the jaw support cage is hard plastic

[robjon44Participant @robjon44]

Please sir (unrelated question) what is the lathe visible in the second picture? I have a Pools '38 Special that is very similar in appearance that someone gave me a lifetime ago (in pieces) which I rebuilt on the firms time & capable of punching well above its weight to this day (read many years later) came with faceplate,4" 4 jaw & all its change gears, I only learned recently that it was the only one supplied with a countershaft by them

BobH

[HopperParticipant @hopper]

Posted by robjon44 on 21/03/2021 10:49:18:

Please sir (unrelated question) what is the lathe visible in the second picture? I have a Pools '38 Special that is very similar in appearance that someone gave me a lifetime ago (in pieces) which I rebuilt on the firms time & capable of punching well above its weight to this day (read many years later) came with faceplate,4" 4 jaw & all its change gears, I only learned recently that it was the only one supplied with a countershaft by them

BobH

In Ady's absence I can tell you its a Drummond M-Type of late 1920s to1930s or so vintage. Myford took over making them for the WD in about 1940 and fitted the V belt pulleys seen on Ady's. Looks like it might even be the coveted long bed version but cant quite see because of that drill getting in the way in the pic.sure Ady will be along to tell you more.

Edited By Hopper on 21/03/2021 11:20:39

[Ady1Participant @ady1]

It's a shortbed M series and my workshop pal

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