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Worm gear


Hi everybody.

I have a electrical actuator that works with a simple worm gear as a gear box and has 3 types.but the siz of worm gear set is equivalant in all of them.the spepecifications are:

Type 1:

Input rpm 1500

Input torque 80 Nm

Power 310 w

Output rpm 18

Output torque 204 Nm

Efficiency 44

Type 2.

Input rpm 1500

Input torque 30 Nm

Power 630 w

Output rpm 48

Output torque 204 Nm

Efficiency 54

If attention, in three of them output totque is equivalant. How can design this worm gear. Wich parameters are changed?pay attention the size must be constant.

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