Tools / Power Tools
Bosch GWS Professional Angle Grinder User Manual
Quick guide for the Bosch GWS Professional angle grinder. Includes safety instructions, assembly, operation, maintenance, and technical specifications for models 9-115 P through 15-150 CIP.
Table of contents
Manual images
Click an image to enlargeQuick guide from the manual
This manual provides essential information for the safe and efficient operation of the Bosch GWS Professional angle grinder series. Always read the full safety instructions before use. Ensure the tool is disconnected from the power source before performing any assembly or maintenance.
Safety Instructions
General Power Tool Safety: Keep the work area clean and well-lit. Do not operate in explosive atmospheres. Keep children and bystanders away. Use personal protective equipment, including safety goggles, dust masks, and hearing protection.
Angle Grinder Safety: This tool is intended for grinding, sanding, wire brushing, and cutting. Do not use for polishing. Ensure all accessories are rated for the tool's maximum speed. Always use the correct guard for the specific application.
Product Description
The Bosch GWS Professional series includes models 9-115 P, 9-125 P, 11-125 P, 12-125 CIP, 12-125 CIEP, 15-125 CIP, 15-125 CIEP, and 15-150 CIP. Key features include a spindle lock button, on/off switch, auxiliary handle, and various protective guards.
Assembly
Mounting Protective Equipment: Disconnect the power plug. Place the protective guard (8) onto the holder until the coding cams align. Press and hold the unlocking lever (1) and rotate the guard until it clicks into place. Adjust the guard position to prevent sparking in the direction of the operator.
Mounting Abrasive Tools: Clean the grinding spindle (18) and all parts to be fitted. Lock the spindle using the spindle lock button (2). Secure the grinding/cutting disc with the clamping nut (15) or the SDS-clic quick-clamping nut (16).
Operation
Switching On/Off: To start, push the unlocking lever (5) to the rear and push the on/off switch (3) upwards. To switch off, release the switch.
Advanced Features: Certain models include kickback stop, restart protection, starting current limitation, and constant electronic control to maintain speed under load.
Working Advice
Rough Grinding: Use a 30° to 40° angle for best results. Move the tool back and forth with moderate pressure.
Cutting: Always use the protective guard for cutting (9). Work with moderate feed suited to the material. Do not apply pressure to the cutting disc or tilt the tool.
Maintenance and Service
Keep the tool and ventilation slots clean for safe operation. If the power cord needs replacement, it must be done by Bosch or an authorized service center to avoid safety hazards.
Manufacturer information
Bosch
Practical help
Common problems
Tool does not start
Check power supply, ensure the switch is in the off position before plugging in, and check if restart protection is active.
Excessive vibration
Check if the abrasive tool is mounted correctly and is not damaged or worn.
Kickback
Ensure a firm grip, use the auxiliary handle, and avoid pinching the disc in the workpiece.
Before use
- Check mains voltage matches the rating plate
- Inspect abrasive tool for damage, cracks, or wear
- Ensure the correct protective guard is mounted
- Check that the auxiliary handle is securely attached
- Wear safety goggles and appropriate protective gear
Specs in practice
- Rated power input
- The power consumption of the tool in Watts.
- Disc diameter
- The maximum allowed diameter of the grinding or cutting disc.
Images and diagrams
- Page 3: Gear head rotation procedure
- Page 4: Overview of components and assembly
- Page 5: Accessory mounting configurations
Model compatibility
- Use only approved abrasive tools mentioned in the manual
- Do not use for grinding concrete
- Ensure the disc hole diameter matches the mounting flange
Manual page author
Emily Carter
User documentation editor
Prepares concise manual descriptions and highlights the most useful setup, operation, and maintenance information for readers.