Pneumatic Tools Online Impact Wrench Information

 

 

Introdution to impact wrenches

We offer a wide range of impact wrenches to help meet your industrial fastening needs. Impact wrenches differ basically from screwdrivers and nutrunners in the method by which they apply torque to the fastener. Screwdrivers and nutrunners have high torque motors which deliver torque directly to the fastener until air is shut off or a limiting clutch in the tool functions. The operator must resist the tendency of the tool to rotate in the opposite direction.

 

Two types of impact wrenches

We offer two types of impact wrenches- Standard and Torque Control. Both types can be found in the Impact Wrench section of our website, or by clicking the link to that section here: impact wrenches main.

 

Standard impact wrenches

The output of standard impact wrenches depends solely on the rated capacity of the tool, the pressure and volume of air entering the tool, and the length of time the tool is kept on the fastener. Maximum output of the tool can be limited by controlling the air entering the tool or by introducing flexible elements between the spindle of the tool and the fastener to absorb some of the impact blow. These methods are fairly effective for impact wrenches, but torque control tools are recommended when bolt torques must be held within close tolerances.

 

Torque control impact wrenches

Torque control impact wrenches have built in mechanisms which sense the torque developed in the fastener and automatically stop the wrench motor when the torque reaches a predetermined value. Each size of torque control impact wrench can be adjusted to deliver any torque within it's range. These tools provide a more exacting control of fastener tightness than is obtainable with any other type of impact wrench.

 

About torque range accuracy

It must be understood that in using the stated torque ranges to choose an impact, at the lowest torque recommended the tool is slightly under-applied but it is, and can be, used very successfully at this level when high speed is desired and / or the tool is to be used on various sizes of fasteners. Also, at the highest torque recommended, the tool may be slightly over-applied, but will cover this application with a longer impacting time.

 

 

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