Torque screwdriver functional principle

torque screwdriver is also called torque screwdrivers, popular understanding is that there screwdriver torque value. There are two main preset torque screwdrivers, Analog (dial) torque screwdriver commonly used. When the preset torque screwdriver can be preset torque value, when the fastener is screwing torque reaches a predetermined value, the screwdriver inside the automatic clutch is disengaged, issued a "despair, despair, despair ..." sound, and this action can be felt by hand. In this case, even if the operation was continued urging, will not exceed the limit set in advance. Coupling quality torque screwdriver fasteners directly affect the various instruments, using quality electrical and
mechanical equipment, household appliances and other products to the reliability of these products.