Chicago Pneumatic CP7731C 3/8" STUBBY IMPACT WRENCH-COMPOSITE | 8941077311

Chicago Pneumatic

  • Chicago Pneumatic CP7731C 3/8" STUBBY IMPACT WRENCH-COMPOSITE | 8941077311 Main Image
  • Chicago Pneumatic CP7731C 3/8" STUBBY IMPACT WRENCH-COMPOSITE | 8941077311 Main Image
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CP7731C 3/8" Stubby Impact Wrench - Ultra Compact & Powerful


  • Best power to weight ratio: 346 ft-lbs / 470 Nm
  • Ultra compact
  • Easy to use
  • Durable


  • 2.1 lbs. – 1.0 Kg
  • 346 ft.lbs - 470 Nm of maximum torque in reverse
  • 4 1/4 in – 107 mm length
  • Jumbo hammer mechanism
  • Steel motor
  • Aluminum clutch housing
  • Composite housing with curved handle with Thermo-Plastic Rubber injected
  • S2S: 1 hand Forward – Reverse operation
  • New power setting system: 1 hand-operation behind the trigger
  • 2 positions in reverse: max and lower torque
  • 2 positions in forward: max and low torque
  • Socket retainer ring
  • Full teasing trigger


Part number 8941077311 
Model CP7731C 
Handle type Pistol 
Square drive 3/8"  
Working Torque Range (fwd) 83-392 Nm 61-289 
Working Torque Range (fwd) 61-289 ft.lbs 83-392 
Maximum Torque (reverse) 469 Nm 345 ft.lbs
Maximum Torque (reverse) 345 ft.lbs 469 Nm
Free speed 9000 rpm
Net weight 2.2 lb 1 kg
Net weight 1 kg 2.2 lb
Power/weight ratio 470 Nm/kg 157
Power/weight ratio 157 470 Nm/kg
Length 4.2" 108 mm
Length 108 mm 4.2"
Average air consumption 4.2 cfm  
Average air consumption 2 l/s 4.2 cfm
Actual air consumption 16.7 cfm  
Actual air consumption 7.9 l/s 16.7 cfm
Air inlet thread size 0.25 "
Min. hose size 10 mm 3/8"
Min. hose size 3/8" 10 mm
Sound pressure 92.8 db(A)
Sound Power 103.8 db(A)
Vibration α (ISO-28927-2) 10.33 m/s²
Vibration K (ISO-28927-2) 1.38 m/s²
Socket retainer Friction ring 
Clutch type Single dog clutch 
Box dimensions 175*202*75  6.89*8*3
Box dimensions 6.89*8*3 175*202*75 

A Genuine Chicago Pneumatic product. For more information on this item or to order, please call Zampini Industrial Group at 1-800-353-4676.


Established in 1901, Chicago Pneumatic Tools offers hundreds of quality air tools designed for a wide range of maintenance and production applications: impact wrenches, ratchet wrenches, screwdrivers, drills, grinders, sanders and polishers, cutting tools, and a whole lot more. Based on decades of expertise in providing the right tools, compressors or construction equipment for the toughest demands, CP understand the needs of the professionals for maintaining and repairing heavy equipment and machinery on-site or off-site.

Zampini Industrial Group is proud to be a premier online supplier of Chicago Pneumatic Tools, and our numerous years representing the CP brand has provided us with a wide range of valuable application experiences that we use to help you get the perfect CP tool for your job!

Zampini Industrial Group is a proud Chicago Pneumatic Distributor

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