I have HSMAdvisor for calculating feeds and speeds. Among the parameters it wants to know about the machine are max speed, max power and max torque. I have one of the ever popular HY 2.2KW water cooled spindles and matching VFD.

Basic maths says that if it can produce 2.2KW at 24000 rpm then the torque is 0.88Nm and at 12000 rpm it's 1.75Nm. But everyone says the torque falls off at lower speeds so is there a well used and trusted table of speed v torque for these spindles? HSMA can be given a table of torque v speed but only if you have one! I have the VFD set up in accordance with the advice given elswhere on the forum.

I currently have the max torque in HMSA set to 0.85Nm for safety but I'd like to be able to give more accurate values at lower speeds for use with larger diameter tools such as skimming hardwoods down to a given thickness with a 19mm end mill for example.

Kit ]]>