Is there any positive or negative rotation of the torsion shear wrench?

扭剪扳手不管是24扳手还是30扳手都没有正反转的，只能正转，如果反转应该是扳手出现问题了。

Torsional shear wrenches, whether 24 wrenches or 30 wrenches, do not have positive and negative rotation. They can only turn forward. If they are reversed, the wrench should have problems.

扭剪扳手有正常套筒，加长套筒，加长套筒适用于空间距离受限制区域。

The torsion shear wrench has a normal sleeve and an extended sleeve. The extended sleeve is suitable for areas with limited space distance.

有些特别狭窄区区域需要用角向扭剪扳手。

Some special narrow areas require the use of angle shear wrenches.

扭矩法就是利用扭矩与预紧力的线性关系在弹性区进行紧固控制的一种方法。该方法在拧紧时，只对一个确定的紧固扭矩进行控制，因此，因为该方法操作简便，是一种一般常规的拧紧方法。但是，由于紧固扭矩的90%左右作用于螺纹摩擦和支承面摩擦的消耗，真作用在轴向预紧力方面仅10%左右，初始预紧力的离散度是随着拧紧过程中摩擦等因素的控制程度而变化的，因而该拧紧方法的离散度较大，适合一零件的紧固，不适合重要的、关键的零件的连接。

Torque method is a method of tightening control in the elastic zone by using the linear relationship between torque and preload. This method only controls a certain tightening torque when tightening. Therefore, because this method is simple to operate, it is a general conventional tightening method. However, about 90% of the tightening torque acts on the consumption of thread friction and bearing surface friction, and only about 10% of the actual effect is on the axial preload. The dispersion of the initial preload changes with the control degree of friction and other factors in the tightening process. Therefore, the dispersion of this tightening method is large, which is suitable for the tightening of a part, not for the connection of important and key parts.

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