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How to calculate 'Turn Milling' feeds and speeds?


Hi, I’m interested in using ‘turn-milling’ and need some help on feeds and speeds. I have a Syil X5 CNC Mill and Unimat 5 Lathe (manual) that mounts on the mill bed.

Challanges: I’m working in the range of 0.05 mm to 2.00mm radius work pieces and cutting tool steel.

The Gwizard doesn’t let me put these two operations (mill/lathe) together when calculating feeds and speeds – a simple excel calculator to combine them would help me but I’m not really sure if I am using the data correctly.

Example 1. cut a pivot; dimensions R0.045 mm, Lenght 1.20 mm with a rise to a 0.15 mm shaft in a gentle curve. Stock: 3.00 mm Tool steel.

Limitations: Syil – 5000 rpm max, Unimat – 200 rpm min, Tool: 2 flute Slotting Cutter 2.00 mm

Questions: what would be the ideal Lathe rpm, Mill cutting rpm, feed rate of the Mill

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Best Answer

The lathe profile does give you mill tooling on the Tool dropdown.

The other way to approach it if that doesn’t appeal is you can use two machine profiles, one for the lathe and one for the mill.

The ideal Rpms and feedrate have to be calculated on a case by case basis.

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