Adjustments capable of axial motion shall be tested with an applied force without jerks of (150 5) N for 1 min in either direction along the axis of adjustment. Adjustments capable of rotation shall be subjected to a torque without jerks of 6 Nm for 1 min. The handle or adjustment means shall not break. After the removal of the applied force or torque, there shall be no more than 10 mm translation axially nor more than 10° permanent rotation