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Silver pneumatic impact wrench with 1-inch square drive, pistol grip handle, bottom exhaust port, and 1/2-inch NPT air inlet fitting

Chicago Pneumatic

Chicago Pneumatic CP797-6 1 in Air Impact Wrench 900 ft-lb

SKU CH-XY13-9PF4B

A 1-inch drive air impact wrench delivering 900 ft-lb fastening torque and 1,400 ft-lb breakaway torque at 90 psi with three speed settings

  • Product typeAir Impact Wrenches
  • Delivers 900 ft-lb fastening torque for heavy-duty bolting
  • 1,400 ft-lb breakaway torque cracks stubborn fasteners
  • Three speed settings match power to the job
  • 40 cfm air consumption at 90 psi operating pressure
  • 1 ft-lb/lb power-to-weight ratio for efficient handling

1-Inch Drive Air Impact Wrench

The Chicago Pneumatic CP797-6 is a general-duty pneumatic impact wrench built for heavy automotive and industrial fastening. It delivers up to 900 ft-lb of fastening torque and 1,400 ft-lb of breakaway torque through a 1-inch square drive. Three speed settings allow the operator to match output to the task at hand.

Sustained Operation at 90 PSI

The tool runs on a constant 90 psi supply and draws 40 cfm, requiring a 1/2-inch hose and 1/2-inch NPT inlet to maintain performance. Under continuous load it produces 121 dB of impact sound and cycles at 1,080 impacts per minute with a free speed of 4,200 RPM. Bottom exhaust directs air away from the work area during extended use.

Upgrade from Smaller Drive Tools

This wrench replaces 3/4-inch drive units when bolt capacity must reach 1-1/4 inches and torque demands exceed 150 ft-lb. The jump is justified for fleets and shops that regularly service large commercial vehicles or heavy equipment where the 47.1 ft-lb-per-pound power-to-weight ratio reduces operator fatigue on high-volume jobs.

How it compares

Measured against everything we stock in Air & Hydraulic Power Tools, at today’s prices. Recalculated every night.

Price $858.99
Pricier than about 92% of the 243 comparable items (median $61.99).

Specifications

Product
Brand nameChicago Pneumatic
Product typeAir Impact Wrenches

Questions about this item

How loud is the 121 dB impact sound level when the CP797-6 runs continuously?

The wrench produces 121 dB at the exhaust, so hearing protection is essential for all-day use.

What compressor capacity and hose size are required to deliver the 40 cfm at 90 psi this tool needs?

You need a compressor rated for at least 40 cfm at 90 psi and a minimum 1/2 in hose with a 1/2 in NPT inlet fitting.

Will the 1 in square drive and 150–900 ft-lb range work with the sockets and bolts I already use on heavy equipment?

The 1 in drive accepts standard 1 in impact sockets, and the 150–900 ft-lb fastening range covers bolts up to 1 1/4 in capacity.

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