How to choose the specification of ratchet wrench
The ratchet mechanism of a ratchet wrench is a unidirectional intermittent motion mechanism composed of ratchet wheel and ratchet claw. The ratchet mechanism is mainly composed of rocker rod, ratchet claw and external ratchet. When the rocker swings clockwise, the ratchet pawl hinged on the lever will be inserted into the teeth of the ratchet, causing the ratchet to turn at a certain Angle at the same time. Now that you know the inner workings of a ratchet wrench, let's look at some other common sense questions.
How to determine the size of the ratchet wrench, is it to measure the square section of the ratchet wrench or other methods? Is this the diagonal size of the square head? Or measure the side length? The answer is to measure the "opposite" side of the falcon, the two parallel sides. Square heads are all based on the imperial system. An inch is 25.4 mm, which is equivalent to 1/4 inch, 3/8 inch, and 1/2 inch. After that, divide 25.4 by 2 to calculate a 1/2 inch ratchet wrench, which is called a 12.5 mm large ratchet wrench in China. As to what size nut and nut will match the socket of what size ratchet wrench, the specification of the socket such as "6.3 mm x10 mm" or "1/4 inch x10 mm" will generally be informed in the detailed instructions at the time of purchase. The front number represents the size of the square falcon, and the back number represents the size of the object that can be screwed.
In addition, it should be noted that the ratchet mechanism has small force transmission, impact and noise when working. As a result, the ratchet mechanism is only suitable for occasions where the speed is not high, the Angle is not large and the power is small.
Ratchet wrench is used to tighten and loosen the nut, with strong applicability, easy to use, labor saving, high torque performance characteristics, is the first choice for professional automobile repair or machine repair.
