Question: I need to find a key that will break at a maximum torque of 2 4 0 Nm . The dimensions of the key are

I need to find a key that will break at a maximum torque of 240 Nm. The dimensions of the key are 6mmx6mm with a shaft diameter of 25 mm. The material is steel 1045. What should the keyway length be to break at 240 Nm

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