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Sorry, I confused you. Below the cylinder are bolt heads, some square and some hex. Sizes are not standard as a model of an 1840 factory engine. The thread is 0-80 about to scale and if I get...

Ah! Thank you. The shape below the cylinder is about 0.2" diameter and needs to be concentric to within 3 or 4 thou. So, I should turn my 1/4" stock to just above finished size for the whole length...

Yes perfect sense. A great weekend when I learn several new things. Thank you

[QUOTE=deadlykitten;2478060]....even smaller, like dia 2-3 mm; the active length of the flutes should be <5.6mm, so to avoid recutting the top as you go down (this may induce a pyramid shape); one...

I hit the same problem.. In the interests of time printed hold-downs from filament with carbon fibre. Not good enough and undid the collet. Sort of fixed by changing the compensation - my mill...

Brilliant. Thanks Roger also for the detailed explanation of centering.

John

Any suggestions how I can mill 1/4" 12L14 rod, vertically in the vice, to leave a cylinder 0.06 diameter and 0.22 tall?

I've tried: One pass, multiple passes to full depth sneaking up on the...

Try slowing down to 4200 rpm and feed at 5 ipm with maybe 3 for the final cut. If your pins are a couple of inches long you could do a test cut changing feed every 0.5" That way you can choose the...

That will get rid of dust but not fumes. An active carbon filter might but I'm not sure.

No welder but there is a heater on the same circuit that comes on and off as well as my small air compressor. Grounding should be ok. I'm just under the limit for the breaker!

I was thinking of...

Thanks for the advice everyone. I used a ball nose mill of very small diameter to rough it out then cleaned it up with the engraving tool. Took for ever and the engraver is quite beat up but looks...

I use a simple flood system with one nozzle on my Taig mill. Works fine.

I've never tried mist. I think there would be serious danger of getting the stuff in the lungs. Particularly in a poorly...

What is the best approach to mill a deep V groove.

I have a 30 degree carbide engraving tool and want to mill a groove 0.050 deep in steel (using a Taig mill). If I go straight down the centre...