Board logo

gears and torque
liam.mccaffrey - 23/6/04 at 11:31 PM

in the hpc gears catalogue(get one if you havn't got one) in the spur gear section there is a table marked

"Torque Check ,50 teeth x 1000 RPM"

it then lists torque (NM) and power (K.W.) values for different gear materials.

this is not that clear so i will give an example to illlustrate

Torque Check ,50 teeth x 1000 RPM

6 DP standard duty spur gear made of 214M15 gives a torque value of 200 and a power of 20.8

the same gear but case hardened gives torque of 953 and power of 99.9


I will be honest i don't know how to interpret this info, are the values max torque values, values @ given rpm,
How would you use the info given to work out if a gear was suitable for use in a gear train for an engine with a known torque output?

If anyone knows I would really appreciate any help

cheers


JAG - 24/6/04 at 08:24 AM

Using this example;

quote:

6 DP standard duty spur gear made of 214M15 gives a torque value of 200 and a power of 20.8



200Nm is the max' torque with the gear stalled i.e stationary and the max' power value can be used to give a max' torque rating at any particular RPM by re-arranging this equation,

Power (W) = Torque (Nm) x RPM (in Radians/second)

Hence,

Torque = Power / RPM (same units as above)