An air ratchet wrench is used to tighten or loosen screw fasteners in the car units. It uses the same principle as a ring spanner, but you don’t have to turn it by hand, as the working part rotation is powered by compressed air. This tool is a must-have for working in hard to reach places.
Types of air ratchet wrenches
These products differ in the following specifications:
Maximum speed. It is measured in the number of revolutions per minute (RPM). Overall, it varies between 150 and 280.
Performance. Mainly depends on the maximum torque and the air consumption. The higher the performance, the higher the price. For example, there are tools with the maximum torque of 33 N⋅m or 163 N⋅m. The air consumption usually ranges from 100 to 300 l/min.
The size of the drive square. It can be 3/8, 1/2, 3/4 inch, etc.
The type of the switch. It can be turn or lever type.
Some tools are equipped with a quick release button for fast socket change. Sockets can be made from different materials: chrome vanadium steel, chromium molybdenum alloy, and others. Tool handles are often made from metal or rubber. They can be straight or curved and also differ in sizes.
Usage tips
You should occasionally use lubricants: this will help you to avoid corrosion.
Do not use the device to loosen over-tightened or damaged fasteners. It is better to use a tap wrench.
Do not over-tighten the fasteners. If necessary, check the torque with a torque wrench.
You should have your tool disassembled, cleaned and lubricated not less than twice a year. It is advisable to have this done in specialized service centres.
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