Tools / Power Tools
User Manual for Bosch GEX 18V-125 Professional Random Orbit Sander
Quick guide for the Bosch GEX 18V-125 Professional random orbit sander. Includes assembly, operation, dust extraction, and maintenance instructions.
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 GEX 18V-125 Professional random orbit sander. Key procedures include battery installation, sanding sheet replacement, and dust extraction setup. Always ensure the tool is switched off before performing any maintenance or accessory changes.
Product Description
The GEX 18V-125 is a cordless random orbit sander designed for dry sanding of wood, plastic, filler, and coated surfaces. It features a speed preselection wheel for adjusting the orbital stroke rate based on the material and application.
Assembly
- Battery: Insert the battery until it clicks into place. To remove, press the release button and pull the battery backward.
- Sanding Sheet: Ensure the sanding pad is clean. Align the holes in the sanding sheet with the holes in the sanding pad and press firmly.
- Dust Extraction: Attach the dust bag to the extraction outlet. For external extraction, connect a suitable vacuum hose to the extraction outlet.
Operation
- Switching On/Off: Press the on/off switch to start the tool. Press it again to switch off.
- Speed Preselection: Use the thumbwheel to select the required orbital stroke rate (1-6).
- Sanding: Place the entire sanding surface on the workpiece and move the tool with moderate pressure.
Maintenance and Cleaning
Always remove the battery before performing maintenance. Keep the tool and ventilation slots clean for safe operation. Empty the dust bag regularly to ensure optimal extraction performance.
Safety
Use the tool only for dry sanding. Avoid overheating the workpiece and the sander. Empty the dust container before breaks. Sanding dust can spontaneously ignite under unfavorable conditions, especially if mixed with paint or polyurethane residues.
Manufacturer information
Bosch
Practical help
Common problems
Tool stops automatically
The battery may be discharged or protected by the Electronic Cell Protection (ECP). Recharge the battery.
Poor dust extraction
Empty the dust bag. Ensure the holes in the sanding sheet are aligned with the holes in the sanding pad.
Before use
- Check battery charge level
- Ensure the correct sanding sheet is attached
- Check that the dust bag is empty
- Ensure the workpiece is securely clamped
Specs in practice
- Orbital stroke rate
- The number of oscillations per minute, adjustable for different materials and applications.
- Orbit diameter
- The size of the circular motion, which determines the sanding efficiency.
Images and diagrams
- (1) On/off switch
- (7) Speed preselection wheel
- (8) Sanding pad
- (13) Extraction outlet
Model compatibility
- Compatible with Bosch GBA 18V and ProCORE18V battery systems.
Manual page author
Michael Turner
Technical manual editor
Reviews PDF manuals for structure, safety notes, and practical product details so readers can find the right information quickly.