Chicago Pneumatic Air Ratchet Wrench CP7829 3/8 in 70 ft-lb 225 RPM

3/8-inch drive air ratchet for tight fasteners

This pneumatic ratchet delivers 70 ft-lb of fastening torque at a free speed of 225 RPM. Its 10 7/8-inch overall length and 3/4-inch side-to-centre measurement suit work in confined engine bays and under-dash areas. The ball-detent retainer holds sockets securely during rapid direction changes. Industrial-duty rating indicates suitability for daily professional use.

Air supply requirements and hose sizing

The tool runs at a fixed 90 psi with an air consumption of 4 cfm, so the compressor and regulator must maintain that pressure under load. A minimum 3/8-inch hose bore is specified to avoid flow restriction at the 1/4-inch NPT inlet. Side exhaust directs air away from the workpiece but adds width near the head. Pressure drop below 90 psi will reduce torque output proportionally.

Replaces manual ratchets and larger impact tools

It upgrades from a hand ratchet when repetitive fastening causes fatigue or when speed matters on long bolt runs. The 70 ft-lb limit means it cannot substitute for an impact wrench on high-torque suspension or driveline fasteners. Buyers who need more torque or a 1/2-inch drive should select a different tool class. The 2.7-pound weight keeps wrist strain low during extended sessions.