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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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Drilling a stack of 1/4" plates
I have to make four identical 1/4" plates that have 15 holes. 11 of the
holes be countersunk for 1/4" socket-head countersunk screws that will be used to mount fixture parts, 4 of the holes are for #10 SHCS for mounting to the machine. These fixtures will hold wood blocks in a machine. I need .005" difference between hole placement in the plates. The plates are 8" x 6" My question is: Can I stack all four plates, tack weld them together and drill all four plates at once in the mill using the DRO to position the plates and have the top plate and the bottom plate be within .005"? In other words, will the drill wander more than .005"? I will use a combined drill countersink to spot the holes then drill undersized, then drill the 1/4" hole using all new drills. |
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