Proto J138RSH Air Ratchet 3/8 Inch Drive 65 Ft/lb

Product Description

The PROTO J138RSH is a 3/8 inch drive inline air ratchet built for professional technicians who need controlled torque in tight spaces. It delivers up to 65 ft/lb of torque at 90 psi operating pressure, running at 350 RPM with an air consumption rate of 3.7 CFM. The inline handle design keeps the tool low-profile and easy to maneuver in confined areas such as engine bays, mechanical rooms, and equipment panels. A 1/4 inch NPT inlet connects to standard shop air lines. At 2.9 pounds and 12.4 inches in overall length, it balances reach with handling comfort during extended use.

This air ratchet is suited for automotive, heavy equipment, and industrial maintenance applications where pneumatic tools are standard. It fits into typical shop setups running a 3/8 inch minimum hose size and a 90 psi compressed air supply. The inline handle makes it a common choice for under-hood work, assembly lines, and service bays where a pistol-grip ratchet would be too bulky. Licensed mechanics, fleet technicians, and industrial maintenance professionals are the primary users.

Key Features

• 3/8 inch drive size compatible with standard 3/8 inch drive sockets
• 65 ft/lb maximum torque output at 90 psi
• Inline handle profile for access in tight and confined spaces
• 350 RPM free speed for efficient fastener cycling
• 1/4 inch NPT inlet fits standard shop air fittings
• 3.7 CFM air consumption suits most shop compressor setups

Compatibility

Designed for use with standard 3/8 inch drive sockets and accessories. Requires a compressed air supply capable of maintaining 90 psi with a minimum 3/8 inch hose diameter.

Installation Notes

Connection and use should follow the compressor and air line manufacturer guidelines. Before attaching or removing the tool from an air line, depressurize the line and verify the quick-connect fitting is fully seated. Use thread sealant on NPT fittings to prevent air leaks. Always inspect the air hose and fittings for wear or damage before each use, and operate within the rated 90 psi maximum pressure.