The Makita GA4591 is a high-performance 4½″ (115 mm) angle grinder engineered for heavy-duty professional use. Powered by a 1900 W motor, it delivers strong cutting and grinding performance across various applications. Designed with SJS™II (Super Joint System II) and a mechanical brake, the tool maximizes user safety and comfort by reducing vibration and stopping the wheel quickly after the trigger is released.

This model offers variable speed control, a soft start function, and constant speed electronics, allowing precise operation even under load. Additional safety features include anti-restart protection and a tool-less wheel guard for quick and safe adjustments. With enhanced durability thanks to labyrinth seals, zig-zag armature coating, and spiral bevel gears in a full aluminum housing, the GA4591 is built to endure harsh job site conditions.

Whether you're cutting metal, grinding welds, or shaping surfaces, the GA4591 offers power, control, and safety in a compact, ergonomic package.

• 15 A heavy-duty motor with variable speed (2,800–11,500 RPM)

• SJS™II system (leaf‑spring + cam gear) reduces vibration, improving user comfort

• Vibration-absorbing side handle for ergonomic handling

• Mechanical brake stops the wheel in under 2.5 seconds

• Electronic controller offering soft start, constant-speed under load, and overload current limiter

• Labyrinth-sealed motor and enlarged cooling fins for dust resistance and cooler operation

• Spiral bevel gears in an all-aluminum housing for efficient power transfer and durability

• Tool-less wheel guard and slide switch with lock-on for convenience

• Continuous Input Power: 1900 W

• No Load Speed: 2,800 – 11,500 min⁻¹ (RPM)

• Spindle Thread: M14

• Grinding Disc Diameter: 115 mm

• Bore Size (B): 22.23 mm

• Anti-Restart Function (NVR Switch): Yes

• Power Supply Cord Length: 4.0 m

• Sound Power Level (LWA): 98 dB(A)

• Sound Pressure Level (LpA): 90 dB(A)

• Noise Uncertainty (K Factor): 3 dB(A)

• Vibration Uncertainty (K Factor): 1.5 m/s²

• Weight Without Cable: 2.8 – 4.0 kg (as per EPTA Procedure 01/2003)

• Product Dimensions (L x W x H): 349 x 130 x 129 mm

• Barcode: 0088381768399

• Makita GA4591 Angle Grinder

• 115 mm grinding wheel (model A‑95956)

• Tool-less wheel guard

• Inner flange & lock nut

• Lock-nut wrench

• Side vibration‑absorbing handle