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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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Dead true centerdrilling.
I used to work in a gear shop and had to repair gear shafts that had been
centerdrilled and had more then the .001 runout that the print called for. I used a steadyrest with ball bearing rollers and that gave me dead true runout. It is best to collet or chuck on a small part of shaft and let the steadyrest pull the shaft to dead true. Then I hand ground a 30 degree angled tool to form one side of the centered part. Imagine half of a centerdrill without the drill part in front of the angle. If you blue up the center of the part you can see it cut the high point of the runout till it is dead on. Jim |
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