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| How do a drill a hole? |
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| John Hill:
I want to drill a hole accurately in the end of a shaft so that I can clamp a tool in the manner of a collet. This is a simple job to fit a centre drill to a Morse taper blank but every attempt so far has come out crooked. :doh: Here is a sketch, of course the male bit has a saw cut so that it can compress somewhat as it is screwed into the shaft. I drilled the hole with the two bits screwed together and mounted in the lathe spindle taper. |
| Bernd:
--- Quote from: John Hill on March 21, 2010, 06:12:39 PM ---I drilled the hole with the two bits screwed together and mounted in the lathe spindle taper. --- End quote --- Did you cut the slot before you drilled the hole? Bernd |
| John Hill:
No, drilled then cut. |
| No1_sonuk:
How many cuts? Could it be that the hole is accurately concentric, but that the grip isn't. |
| John Hill:
I have only one cut in the 'collet'. |
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