8" Bison 4 Jaw Combination Chuck

I was not aware that they made a combination chuck in 5", the smallest I have seem is 6" (125 mm). They are very nice chucks, but I feel on your size machine you would be better off with two separate chucks. The stick out from spindle will be less and about 1/2 the weight, also significantly less expensive. I do like using the combination chuck, but in a smaller size I feel there are better options such as a high quality set-tru type 3J and the collets, get an inexpensive 4J independent for the infrequent use.
 
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