new life for an old sioux valve grinder NKVF
New life for an old Sioux valve grinder. May 24, 2008· Sioux valve grinder accuracy depends on tipping chamfering valve stem tips so they seat properly in the tail cone before grinding valve faces. If you are only grabbing a piece of stock with the 3 balls in the chuck it's most likely going to wobble. The tapered balls need to rotate as





































