Gallery, Projects and General > How do I??
Tapping a lot of holes
Brass_Machine:
--- Quote from: usn ret on April 13, 2009, 10:01:54 PM ---Eric, were it me drilling and tapping that many holes I would set up the mill to drill established dial settings and a vise stop for repeatability. The tapping, I would use a battery powered drill with the plates ridigidly supported to prevent tap breakage and maintain s degree of quality. Again lots of quality tapping lubrcant. For power drill tapping a 2 flute is strunger than a 4 flute tap. :dremel:
Cliff :beer:
--- End quote ---
Cliff,
Could you explain in a some detail about tapping with a battery powered drill? I have one. It has a clutch. All I would need is a high speed 2 flute tap? Set the clutch or use it as a drill?
Bernd,
That is a metric tap... M8x1.25
Many thanks
Eric
Darren:
That would have to be one serious battery drill to tap M8 threads Eric :bugeye:
I suppose it depends how thick the material is you are tapping?
usn ret:
Eric, tapping 8x 1.25 {5/16-18 approx.} can be easily accomplished in 6061 alum. I have power drill tapped 1/4-20 holes in 3/8 mild steel with no problems. First drill the 12 holes per plate then clamp {vise} the plate vertically so that you can have a comfortable angle, somewhere about waist high, to hold drill steady. Protect the alum plate by covering the vise jaws with a sacrificial material, wood, copper or another piece of alum. Practice with a piece of scrap alum to get a feel for the tapping process. With 600+ holes to drill and tap get the best drill and tap you can afford. Again for freehand tapping I recommend 2 flute taps and a good tapping lubricant, Tap-magic or other lube. Use the forward reverse function on the drill for in/out. :coffee: I have probably forgotten something {CRS} , if so somebody, HELP!!!
My drill is a 18V 3/8 Dewalt and had no problems with tapping in the steel. LUBRICATION LUBRICATION LUBRICATION!!!!!!!
Cliff
Brass_Machine:
--- Quote from: usn ret on April 14, 2009, 11:57:42 AM ---... LUBRICATION LUBRICATION LUBRICATION!!!!!!!
...
--- End quote ---
Ciff,
You trying to tell me something? :ddb:
Lol... I will get some decent lube.
Eric
usn ret:
Eric, set the drill on the drill setting. The shank of the tap will slip if the tap binds, that is your clutch function. There is just no way to tighten the chuck tight enough to prevent slippage if the tap binds. Yes I am trying to tell you something LUBRICATION
CLIFF :beer:
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