Holding small parts in a large lathe chuck

[scrdmgl]

Hi JR: Depending on the degree of accuracy, needed or expected on the part to be machined, by holding any type of chuck or holding device, you're relying on the lathe chuck plus the second device to hold a tolerance. Remember this, you're best center line is the one provided by your lathe spindle. By stacking up component over component, you're adding up their built in deviation to the part being held. Given the size of your lathe I figure the your spindle must be a MT3 size. MT chucks of ER type, are offered in ER40 (maximum size commonly available) or ER32 if so you wish, that can be found in the web for affordable prices unless you decide to go for high end chucks of the same type which are also available. One vendor that offers good quality ER chucks in many variations at good prices, is CTC Tools who has reasonable shipping rates to North America and elsewhere. I'm satisfied with their products for price and quality, check them out. The above recommendation applies only if you're working at high or maximum accuracy, otherwise don't bother. However, my working philosophy is never to sell yourself short on quality and precision if possible.

Regards

Jorge