| The Breakroom > The Water Cooler |
| Chuck question... |
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| AdeV:
I've finally decided to splash out on a brand new 3-jaw chuck for my lathe; I've picked up 3 2nd-hand 3-jaws at various times; and, frankly, they're all rubbish; chucking a bar, then re-chucking it, and I get anything up to 0.010" TIR. Not good. I've been getting along with a 4-jaw independent, but there's wear in that too & I have to shim one of the jaws to prevent it holding the workpiece at an angle. So, anyway, new chuck.... I'm aware I will have to make a backplate; my question is, should I get the 200mm chuck, or the 250mm for an extra £30? The next size down (160mm) doesn't have any soft jaws available, which rules it out IMHO; and the next smallest is smaller than my spindle nose. The biggest bar stock I tend to use is ~2", although I do have some plans to turn a piece around 9.5-10" diameter (but I can always use the 4-jaw for that, if I have to). The lathe spindle will only pass ~45mm stock, so the size of the hole in the centre of the chuck isn't really a consideration. Is this a case of bigger basically being better? Or should I save the 30 quid by going for the smaller one? |
| lordedmond:
well if you don't you will wish you had :) get the bigger one its only 12 pints but do get one that has soft jaws tho seriously if you get a smaller one then need a bigger one you will not have saved the £30 but you will have spent the cost of the chuck twice ( not sure that reads right ) anyway spend the extra now else you will have to fork out for another one later BY eek I am tying myself up in knots just my 2 cents worth of rambling Stuart |
| DaveH:
AdeV, If you are happy (and your lathe is) about the 250 chuck, then a larger chuck is always useful to have. On the odd occasion you really need that 250mm it will be well worth the extra. However, asking your lathe to do something it was never designed to do will in the end just cause you trouble. That’s my 2 p’s worth. :beer: DaveH |
| krv3000:
well i wood say the big one to |
| AdeV:
Cheers chaps, the big one it is then. Dave - my lathe is quite large, and cheerfully spins a 10" 4-jaw chuck, so I figure the 10" 3-jaw should present no problems for it. I'd wondered about the 12" 3-jaw, but it's starting to get quite pricey, and I'm sure I won't need anything THAT big. |
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