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| Drilling! - small holes on the mill and centre drills |
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| Jasonb:
If I was doing it in the mill I would hold the bar horizontally in the vice, set the spindle over the centre - ruler trick if its not totally accurate or use an edge finder, then use a No1 center drill to get a start and then follow up with the 0.8mm drill. Done this a lot on my current traction engine as there are a lot of 1/8" pins that are retained by 1/32nd split pins like this Jason |
| ksor:
--> craynerd If the problem is centering the drill on a lathe - here is a nice solution - I found it the other day ... maybe here, maybe on HMEM - I can't remember ... as I remember there was a short video showing the trick on a drill press ! Mount your center drill Mount the object in the chuck Put some model clay on the end of the object place a niddle in the clay so the niddle nearly reaches the cener drill start spinding - but no TOO FAST ! With your finger you can now "center the niddle" Now you just have to align the niddle and the centerdrill But maybe it not the acuracy that you want - a simple and easy method anyway |
| 75Plus:
Hey Guys, Look at the title of the thread :poke: :poke: "Drilling! - small holes on the mill and centre drills" |
| ksor:
I have ... but I can't read :doh: ! |
| kvom:
Another idea: use an end mill to create a flat area before using the center drill. |
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