Chicago Pneumatic 8941077220 Air Impact Wrench 3/8 in

Product Description

The CHICAGO PNEUMATIC 8941077220 is a compact 3/8 inch drive air impact wrench built for general maintenance work in automotive, mechanical, and light industrial settings. It delivers 90 ft/lb of torque at up to 9,500 RPM with 1,400 impacts per minute, making it effective for fastener removal and installation on mid-range fastener sizes. The butterfly handle design keeps the tool compact and maneuverable in tight spaces. It requires a 90 psi air supply and consumes 13 CFM, so pairing it with an adequately sized compressor and supply line is essential for consistent performance. At 2.53 pounds, it is light enough for extended use without significant fatigue.

This wrench suits residential and commercial maintenance tasks where a mid-torque, compact air tool is appropriate. Typical applications include brake service, suspension work, HVAC equipment assembly, and general fastener work on mechanical systems. The rear exhaust directs airflow away from the work area, which is useful in confined spaces. It is commonly used by automotive technicians, HVAC service technicians, plumbers, and general maintenance tradespeople who carry air tools as part of a standard kit.

Key Features

• 3/8 inch drive with friction ring retainer for secure socket retention
• 90 ft/lb torque output at 90 psi operating pressure
• 9,500 RPM and 1,400 impacts per minute for fast fastener cycling
• Butterfly handle style for compact grip and easy one-hand control
• Rear exhaust routes airflow away from the operator and work surface
• Lightweight at 2.53 pounds for reduced fatigue during extended use

Compatibility

Designed for use with standard 3/8 inch drive impact sockets. Requires a minimum 3/8 inch hose and a 1/4 inch NPTF or NPT air inlet fitting. Compatible with compressed air systems supplying a steady 90 psi and at least 13 CFM at the tool.

Installation Notes

A licensed or experienced technician should verify that the air supply system delivers the required pressure and flow before connecting the tool. Always depressurize the air line before attaching or detaching the wrench from the hose. Use thread sealant appropriate for pneumatic connections on the NPT fitting, and confirm the minimum 3/8 inch hose ID is maintained from the compressor to the tool to avoid pressure drop. The 108 dB sound level requires appropriate hearing protection per applicable workplace safety regulations.