Proto J138WA Air Impact Wrench 3/8 in Drive 170 Ft/lb

Product Description

The PROTO J138WA is a 3/8 inch drive inline air impact wrench built for trade professionals who need reliable fastener removal and installation in tight service environments. It delivers 170 ft/lb of torque at a free speed of 7,200 RPM, with 1,600 impacts per minute for rapid, consistent power output. Air supply requirements are straightforward: 90 psi operating pressure and 5 CFM air consumption through a 1/4 inch NPT inlet. The bottom exhaust design directs air away from the work area, keeping debris and exhaust out of the technician's face during use. At 4 pounds, it is light enough for extended overhead or confined-space work.

The J138WA is suited for automotive, HVAC, plumbing, and general mechanical service applications where a compact, mid-torque impact wrench is needed. The inline handle configuration makes it a natural fit for wheel service, equipment assembly, and underhood fastener work. A minimum 3/8 inch hose is required to maintain adequate airflow. This tool is intended for use by licensed mechanics, HVAC technicians, plumbers, and experienced tradespeople operating shop air systems.

Key Features

• 170 ft/lb torque output for mid-range fastener work
• 7,200 RPM free speed with 1,600 impacts per minute
• Inline handle design for access in confined spaces
• Bottom exhaust keeps airflow directed away from the operator
• 1/4 inch NPT inlet compatible with standard shop air fittings
• Lightweight at 4 pounds for reduced operator fatigue

Compatibility

Designed for use with standard 3/8 inch drive sockets and accessories. Requires a shop air supply capable of delivering 90 psi and 5 CFM through a minimum 3/8 inch air hose.

Installation Notes

Ensure the air supply is depressurized and the compressor is shut off before connecting or disconnecting the tool from the air line. Use a properly rated 3/8 inch or larger air hose and confirm all fittings are rated for the operating pressure. Apply a few drops of pneumatic tool oil to the inlet before first use and periodically during service to maintain internal components. This tool should be operated and serviced by qualified tradespeople familiar with pneumatic tool safety practices.