Section R. 408.13866 - Pneumatic powered nut runnerRule 3866.
(1) A pneumatic powered angle nut runner with a trigger type operating control shall have the control located so that the reaction force of the runner does not create additional pressure on the trigger.(2) A mechanical means shall be provided to absorb torque reaction of a stall type tool and used where: (a) The resultant sustained force on an operator of an angle head nut runner or an inline tool with dual offset handles is more than 50 pounds.(b) The reaction torque from an inline nut runner with a single offset handle is more than 100 inch pounds.(c) The reaction torque of an inline nut runner without an offset handle is more than 30 inch pounds.(3) A powered nut runner other than a stall type shall be provided a device, such as a reaction bar, when the reaction force on the operator is such that the operator cannot control the tool.Mich. Admin. Code R. 408.13866