I'd like to ask. How accurate is the pneumatic wrench? Bolts for M4M5? What are the advantages and disadvantages of an electric wrench?
Fixed torque precision pneumatic wrench is relatively high, relatively accurate in bolt torque situations commonly used, such as cars and planes of some key parts screw some key screw tightening, as previously mentioned the German DEPRAG, and so on Ingersoll Rand manufacturers are producing, precision can reach 2%, but the price is not cheap. Both suitable for tightening M4M5 bolts.
Precision pneumatic wrench depends on its type, the accuracy is poor, which is related to its structure design, manufacturing precision, the use of air pressure, operation time (time trigger) etc..
The main advantage of the wrench is gas overload protection ability is good, even if the wrench was Biesi, as long as the restart will be normal use; no spark, can be used in some dangerous situations such as coal mine gas. But the noise is large (can add noise elimination), the need for gas sources, due to the use of gas injection, there are some lubricants, the environment has a certain pollution.
