New mill user, what do I need to start.

[jaCK Hobson]

On jaCK Hobson Said:

The slot turned out wider than 10mm – not a real problem… But it also turned out much deeper as I hadn’t tightened up the collet enough and the cutter showed the down side of being able to plunge cut. Don’t practice on expensive materials!

 

I had that problem until I looked up the recommended tightening torque for ER 32 collet nuts.  It is 105 Nm or 77 ft.lb in old money.  Difficult to reach that torque with the standard collet spanners.

Russell

 

[VicParticipant @vic]

I use Ball Bearing nuts on my collet chucks, much easier to tighten.

https://www.arceurotrade.co.uk/Catalogue/Collets/ER-Collet-Nuts-Wrenches-and-Spanners/ER-Collet-Nuts-with-Ball-Bearing-Type-B

 

[old martParticipant @oldmart]

We use er25 at the museum, and have two sets of collet spanners, for up to 8mm diameter the standard length is fine, and extended ones with 12″ long handles for the larger endmills. I chose er25 simply because endmills over 16mm get expensive. However, if you intend to use er collets with the lathe using a plate, then larger is better because then they will be holding work rather then cutters. There will be a slight loss of Z height with larger collets in the mill which might be a factor with a small machine.

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