AES
Established Member
I have the above Rohm "Supra" (3 mm - 16 mm) model 3 jaw chuck fitted to my pillar drill. It's a lovely bit of kit, runs very true, and I keep it scrupulously clean.
BUT, it's a keyless (which I've never liked all that much - old-fashioned me I suppose), and even when brand new, about 7 or 8 years ago, I needed to use a pair of thick gloves to tighten up any size drill well enough that it would hold for any length of time. As time has gone on it's got even more difficult to tighten up properly on both round and hex shank drills, and now I have had to resort to using a large open-ended spanner on the two flats just at the top of the chuck to tighten up. Recently it's got to the point that even with spanner tightening the drill slides gracefully down out of the chuck every time I stop the machine (whether I've finished drilling or not!).
Frankly it's driving me potty. I've had the chuck out of the pillar drill (but have not removed the MT 2 adaptor from the chuck) and cannot see any way of adjusting the gripping movement of the jaws. I also cannot see that any one of the jaws is moving ahead of/behind the other two when tightening.
As said, it's a lovely bit of kit, was very expensive (for a hobbyist) and runs perfectly true, so I really do not want to replace it. As far as I remember there was no "manual" with the chuck - I don't have one now anyway, and I haven't found anything on "t'internet". So does anyone know if there is any way I can adjust (tighten) the jaw closely mechanism please?
The tightening problem apart I certainly don't want to replace this chuck.
TIA
Krgds
AES
BUT, it's a keyless (which I've never liked all that much - old-fashioned me I suppose), and even when brand new, about 7 or 8 years ago, I needed to use a pair of thick gloves to tighten up any size drill well enough that it would hold for any length of time. As time has gone on it's got even more difficult to tighten up properly on both round and hex shank drills, and now I have had to resort to using a large open-ended spanner on the two flats just at the top of the chuck to tighten up. Recently it's got to the point that even with spanner tightening the drill slides gracefully down out of the chuck every time I stop the machine (whether I've finished drilling or not!).
Frankly it's driving me potty. I've had the chuck out of the pillar drill (but have not removed the MT 2 adaptor from the chuck) and cannot see any way of adjusting the gripping movement of the jaws. I also cannot see that any one of the jaws is moving ahead of/behind the other two when tightening.
As said, it's a lovely bit of kit, was very expensive (for a hobbyist) and runs perfectly true, so I really do not want to replace it. As far as I remember there was no "manual" with the chuck - I don't have one now anyway, and I haven't found anything on "t'internet". So does anyone know if there is any way I can adjust (tighten) the jaw closely mechanism please?
The tightening problem apart I certainly don't want to replace this chuck.
TIA
Krgds
AES