Pro-source 5555001021PRO Air Angle Grinder 4 in 3500 Rpm

Product Description

The PRO-SOURCE 5555001021PRO is a pneumatic angle grinder built for metal fabrication, grinding, and surface preparation in professional shop and field environments. It accepts a 4-inch wheel and spins at 3,500 RPM, powered by a 0.40 HP air motor that draws 3.9 CFM at 90 psi operating pressure. The 1/4-inch NPT inlet connects to standard shop air lines, and rear exhaust routes spent air away from the work surface and the operator. A safety lever with trigger lock gives the technician positive control during extended use. At 2.6 pounds, this grinder is sized for overhead and confined-space work without excessive fatigue.

This grinder is suited to HVAC fabricators, pipefitters, plumbers, and maintenance mechanics who need a compact, lightweight pneumatic tool for deburring, weld dressing, rust removal, and surface blending. The M6x1 spindle accepts standard small-wheel accessories common in plumbing and mechanical trades. It fits naturally into any shop running a 90 psi compressed-air system, which is the standard supply pressure for most trade air compressors. Overall length is 11 inches, keeping it manageable in tight access areas.

Key Features

• 4-inch wheel diameter for compact grinding and deburring tasks
• 3,500 RPM free speed at 90 psi operating pressure
• 0.40 HP air motor draws 3.9 CFM — compatible with most shop compressors
• 1/4-inch NPT inlet fits standard quick-connect fittings
• Rear exhaust directs airflow away from the work area
• Safety lever with trigger lock for controlled, fatigue-reduced operation
• Lightweight at 2.6 pounds for overhead and confined-space use

Compatibility

Designed for use with 4-inch grinding wheels and accessories with an M6x1 spindle thread. Compatible with any compressed-air system supplying 90 psi at a minimum of 3.9 CFM through a 1/4-inch NPT air line.

Installation Notes

Installation and operation should be performed by a qualified technician familiar with pneumatic tool safety. Before mounting or changing a wheel, disconnect the air supply and verify the grinder has fully stopped. Ensure the air line delivers clean, dry, lubricated air to protect internal components and extend tool life. Always confirm wheel rating meets or exceeds the grinder free speed before use, in accordance with ANSI B7.1 wheel safety standards.