The measuring components are usually shaped in the form of cylinder in former torsion wrenches.The calibration of torsion torque is determined by the measurement of shearing stress in the cylinder.

• 以往的扭力扳手中测量元件多为圆柱体形状,通过测量柱体剪应力来标定扭矩,而圆柱形材料抗扭强度低,导致扭矩测量量程范围较小,不能进行大扭矩测量。