Angle Grinder Bosch GWS 9-125 S

The Bosch GWS 9-125 S angle grinder is a compact handheld tool designed for metalworking and construction tasks. Equipped to accept a 125 mm (12.5 cm) grinding disc and capable of reaching an idle speed of up to 11,000 rpm, this model balances power and maneuverability. With a rated input of 900 W and an output of 450 W, the tool delivers effective material removal while remaining lightweight at approximately 1.9 kg and measuring about 100 mm in height and 280 mm in length.

Advantages

The lightweight construction and compact dimensions make the GWS 9-125 S easier to handle during extended use or when working in confined spaces. High no-load speed supports fast cutting and grinding progress on metal and masonry. The combination of 900 W input power and a standard 125 mm disc provides a practical balance between performance and size for common trade and home tasks. The familiar Bosch ergonomic design and reduced overall length improve control and precision.

Suitable for

• Cutting and grinding steel and other metals
• Removing rust, scale and old paint from metal surfaces
• Shaping and beveling metal edges
• Light masonry grinding and surface preparation
• Workshop maintenance and fabrication tasks

Key specifications

• Disc diameter: 125 mm (12.5 cm)
• No-load speed: up to 11,000 rpm
• Rated input power: 900 W
• Rated output power: 450 W
• Weight: approximately 1.9 kg
• Overall dimensions: approx. 100 mm height × 280 mm length
• Colour: blue and black housing

How to use

Before use, select a suitable 125 mm disc for the task and ensure it is in good condition and rated for the tool's maximum speed. Secure the guard and auxiliary handle according to the manual. Hold the grinder with both hands, position the disc at the correct angle to the workpiece, and apply steady, controlled pressure—avoid forcing the disc into the material. Allow the grinder to reach full speed before contacting the surface and maintain firm control until the disc stops after switching off. Follow standard safety practices including eye, ear and hand protection.

Usage recommendations

Use discs and accessories that match the 125 mm diameter and maximum rpm rating. For cutting or grinding metal, choose appropriate abrasive or cutting wheels; for surface preparation use wire brushes or flap discs designed for the task. Replace worn discs promptly and inspect the tool regularly for damage. Maintain adherence to safety instructions and local regulations when operating the angle grinder.