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Silver pistol-grip air impact wrench with black handle grip and bottom exhaust port

Chicago Pneumatic

Chicago Pneumatic CP9541 pneumatic impact wrench 450 ft-lb breakaway

SKU CH-60F5-8VYZ8

1/2-inch air impact wrench delivers 450 ft-lb breakaway torque at 90 psi with three speed settings

  • TypeAir Impact Wrenches
  • 450 ft-lb breakaway torque for stubborn fasteners
  • 320 ft-lb fastening torque handles heavy-duty assembly
  • 8,900 RPM free speed speeds up repetitive tasks
  • 1,100 impacts per minute deliver consistent power
  • 8 ft-lb/lb power-to-weight ratio reduces operator fatigue

CP9541 1/2-inch air impact wrench

The Chicago Pneumatic CP9541 is a 1/2-inch pistol-grip impact wrench powered by compressed air. It delivers 450 ft-lb of breakaway torque and 320 ft-lb of fastening torque at a free speed of 900 RPM. The tool operates at 90 psi with an air consumption of 13 cfm and requires a minimum hose size of 1/2 inch.

Suited for industrial assembly and heavy maintenance

This wrench suits technicians who need high breakaway force for large fasteners up to 1/2-inch capacity and prefer three speed settings for control. The bottom exhaust directs air away from the work area. Buyers without a compressor capable of sustaining 13 cfm at 90 psi or who need a lighter tool for continuous overhead use should consider other options.

450 ft-lb breakaway torque decides fit

The single specification that determines whether this is the right part is the 450 ft-lb breakaway torque rating. If the application regularly requires loosening fasteners seized beyond 320 ft-lb of fastening torque, this model provides the necessary peak force. If the maximum required breakaway force is lower, a smaller wrench may be more appropriate.

Highlights

  • 450 ft-lb breakaway torque for stubborn fasteners
  • 320 ft-lb fastening torque handles heavy-duty assembly
  • 8,900 RPM free speed speeds up repetitive tasks
  • 1,100 impacts per minute deliver consistent power
  • 8 ft-lb/lb power-to-weight ratio reduces operator fatigue

Specifications

TypeAir Impact Wrenches
BrandChicago Pneumatic

Questions about this item

Should I choose the CP9541 or a different capacity impact wrench for general automotive work?

The CP9541 delivers 450 ft-lb breakaway torque and 320 ft-lb fastening torque, covering most lug nuts and suspension bolts on passenger vehicles.

What does the 450 ft-lb breakaway torque mean when I am actually using the tool?

It is the peak torque available to crack a seized fastener; sustained tightening torque is 320 ft-lb, so final torque should still be verified with a torque wrench.

What air supply does the 1/4 in NPT inlet require to reach the rated 900 RPM free speed?

Supply 90 psi through a minimum 1/2 in hose delivering 13 cfm; pressure below 90 psi will reduce speed and torque output.

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