If you are replacing your existing STANDARD sized chuck on your Valve Refacer, then our Large Chuck requires a replacement large yoke (Part Number 012-1035-21) and the chuck cover will have to have minor grinding where the chuck cover fits over the chuck...it has to be cut back for the large chuck to fit properly.
If you have questions or concerns about this, you can call our Technical Support Office at 1-800-553-5953.
NOTE: Chuck orders, in general, can take 3 to 4 weeks for delivery. Chucks are made in small batches. For this reason and the fact that chucks for new machine sales take precedence, it can sometimes take longer for chucks to become available for parts orders.