dial indicator torque wrenches is also called the torque wrench, torque is the product of the force and distance, when the thread fasteners such as fastening screw bolt and nut torque size needs to be controlled, to ensure that the thread fastening and not because of destruction of the torque is too large, so use the Mechanical Torque Wrenches to operate. First set a maximum torque, torque reaches the set value when, wrench "card tower" noise or wrench joint bending Angle, this is already tightening torque. Torque wrench can be divided into: preset torque wrench,
Camshaft is a cylindrical rod of the same length with the cylinder group.Above there are several cam, used to drive
the valve.Camshaft bearing at one end, and at the other end is connected to the drive wheels.
Side of the cam is egg-shaped.calibration of torque wrenches design goal is to ensure that the cylinder sufficient intake and exhaust, specifically, in
the shortest possible time in the valve opening and closing action.Taking into account the durability and smooth operation of the engine, valve or the deceleration during opening and closing movements too much impact, otherwise dial indicating torque wrenches will cause severe valve wear, noise, or other serious consequences.
Generally inline engine, one cam per valve, v engine or a horizontally opposed engine is one cam per two valves share.Rotary engine and valve valve
engines due to their special construction, does not need the cam.
