What is the difference between the electric wrench and the air?
Electric wrench is motor driven, it can smooth output torque, you can make accurate torque. But the damage to the bolt is very small, but when the motor overheating will affect the accuracy of the torque, and in line with the sparks and other unsafe factors, so in general do not have electric wrench in the engine assembly line etc..
Pneumatic wrench, pneumatic wrench, pneumatic. Air driven pneumatic motors, made of percussion blocks. It's not actually turning, it's hammering on the nut. Therefore, the noise is relatively large, and can not be effectively fixed torsion, and there will be some harm to the bolt, and sometimes the bolt will crack. Also can achieve a smooth output pneumatic wrench, accurate twist, little noise, is a stall type pneumatic wrench, it is driven by a pneumatic motor gear group work, because it is not struck, so generally have a reaction arm. Although these advantages, but slower than percussion wrenches. Stall type wrench of foreign brands like British norbar, Atlas professional but very expensive.
The air (pneumatic wrench) features: is driven by air pneumatic motor, with the impact of work piece, through kept tapping nut / bolt. Therefore, the noise is relatively large, and can not do the effective fixed torsion, but also will have certain harm to the bolt.
Electric wrench features: electric wrench is motor power, you can smooth output torque, you can do accurate torque, and the damage to the bolt is very small, but when the motor overheating will affect its torque accuracy.
The difference between electric wrench and the air is driven in different ways. Electric wrench is driven by a motor, and the air by air pneumatic motor drive.
