Angle Grinder Bosch GWS 9-125 S

The Bosch GWS 9-125 S angle grinder is a compact power tool designed for metalworking and general grinding tasks. Equipped with a 125 mm (12.5 cm) grinding disc and a 900 W motor, the tool delivers high rotational speed up to 11,000 RPM while maintaining a lightweight body of 1.9 kg. Its compact dimensions (100 mm height, 280 mm length) and ergonomic two-colour housing provide comfortable handling and accessibility in confined work areas. The grinder runs from AC mains power and includes a first gear idle speed of 2,800 RPM for controlled startup and low-speed applications.

Advantages

The Bosch GWS 9-125 S combines a powerful 900 W motor with a small, easy-to-handle form factor, allowing efficient material removal and finishing. The tool’s high maximum speed provides effective cutting and grinding performance on metal and similar materials, while the lower first gear idle speed supports controlled engagement and safer handling for delicate tasks. With a weight of 1.9 kg and compact dimensions, the grinder reduces operator fatigue during extended use and fits into tight spaces where larger models cannot operate.

Suitable for

• Cutting and grinding metal parts
• Removing rust, scale and paint
• Surface preparation before welding or painting
• Shaping and deburring metal edges
• Work in confined or hard-to-reach locations

Key specifications

• Disc diameter: 125 mm (12.5 cm)
• Rated input power: 900 W
• Maximum no-load speed: 11,000 RPM
• First gear no-load speed: 2,800 RPM
• Weight: 1.9 kg
• Height: 100 mm; Length: 280 mm
• Power supply: AC mains
• Housing colour: Blue and Black

How to use

Before use, secure a suitable 125 mm disc rated for the tool’s maximum speed, and ensure the workpiece is clamped or stable. Connect the grinder to a compatible AC mains outlet. Hold the tool firmly with both hands and position the guard between the disc and the operator. Start the grinder and allow it to reach operating speed; use the lower first gear speed for controlled engagement where available. Apply steady, even pressure—do not force the disc through the material. After finishing, release the switch and wait for the disc to stop completely before setting the tool down. Follow manufacturer safety instructions, wear appropriate protective equipment, and disconnect power before changing discs or performing maintenance.

Usage recommendations

Use cutting or grinding discs that match the disc diameter and speed rating. Wear eye, ear and hand protection, and work in a well-ventilated area to manage dust and sparks. For prolonged use, consider auxiliary handles and regular breaks to reduce fatigue. Inspect discs for damage before each use and replace worn or cracked discs immediately.