What are the units / formulas used for feed and speed calculations in metric?


(William Adams) #1

Looked a bit, but not really finding much.

Asking 'cause I’d like to use the expected units, and I’m tired of doing the calculations in Imperial and then converting.

This page: https://www.engineersedge.com/calculators/machining-cutting-speeds-calc.htm list one:

SFM (surface feet per minute) is instead m/min (meters per minute)

I’d like to know the metric for chip load per tooth in particular, but any information on conventions would be welcome


(mikep) #2

Just use meters instead of imperial for everything.

“Chip load is the depth of cut for each tooth on a milling cutter”
so, meters instead of fractions of an inch (and a much smaller number!) .


(Neil Ferreri) #3

@WillAdams Does this help?


(William Adams) #4

Yes, that does help. Doesn’t cover everything, but does have some information / formulas / calculations I hadn’t seen before.