Tools / Power Tools
Hilti AG 125-7SE 05 Angle Grinder Instruction Manual
Quick guide for the Hilti AG 125-7SE 05 and AG 125-8SE 05 angle grinders. Includes setup, accessory installation, safety warnings, and maintenance procedures.
Table of contents
Manual images
Jump to the sectionQuick guide from the manual
This document provides essential operating instructions for the Hilti AG 125-7SE 05 and AG 125-8SE 05 angle grinders. These tools are designed for professional use in cutting, grinding, and sanding metal and mineral materials. Always ensure the tool is used with the correct guard and accessories for the specific application.
Description
The angle grinder features an arbor lockbutton, on/off switch, speed adjustment thumbwheel, and side handle. It is designed for use with 125 mm discs. The AG 125-7SE has a speed range of 6000-11500 rpm, while the AG 125-8SE ranges from 3500-11500 rpm.
Operation
Before starting, ensure the side handle is securely attached. To fit the guard, release the clamping lever, position the guard on the spindle collar, and secure it by closing the lever. Always disconnect the power plug before changing accessories. When cutting, apply moderate pressure and hold the tool at a 90-degree angle to the surface. For rough grinding, maintain a 5 to 30-degree angle of attack.
Maintenance
Regularly clean the air vents with a dry brush. Do not use water or steam cleaners. If the tool fails to start, check the power supply, supply cord, and carbon brushes. If the tool is overloaded, release the switch and allow it to run under no load for 30 seconds. Repairs to electrical parts must be performed by trained specialists.
Safety
Always wear eye protection and use both hands. Do not use the standard guard for cutting operations. Ensure the workpiece is secured with clamps. Avoid contact with live wires and keep the cord clear of the spinning accessory. Never use damaged accessories or cut-off wheels for grinding.
Manufacturer information
Hilti Corporation
Practical help
Common problems
The tool doesn't start.
Check for power supply interruption, inspect the supply cord/plug for defects, or check if carbon brushes are worn.
The tool doesn't work (overload).
Release the on/off switch, press it again, and let the tool run under no load for approximately 30 seconds.
The tool does not achieve full power.
Ensure the extension cord has an adequate conductor cross-section.
Before use
- Check the work area for concealed electric cables or gas/water pipes.
- Ensure the correct guard is fitted for the intended application.
- Inspect the accessory tool for chips, cracks, or wear.
- Verify that the supply cord and plug are in good condition.
- Ensure the side handle is securely attached.
- Wear appropriate personal protective equipment (eye protection, dust mask, etc.).
Specs in practice
- Maximum disc diameter
- The largest disc size compatible with the tool (125 mm).
- Protection class II
- The tool is double-insulated for electrical safety.
Images and diagrams
- Page 2: Overview of components including arbor lockbutton, switch, and side handle.
- Page 3-4: Procedures for fitting and adjusting the guard.
- Page 4: Instructions for mounting grinding discs and wire brushes.
- Page 5-7: Maintenance procedures for replacing the supply cord, switch, and carbon brushes.
Model compatibility
- Use only synthetic-resin-bonded, fiber-reinforced wheels with a maximum diameter of 125 mm.
- Do not use cut-off wheels for grinding.
- Use a dust removal hood with a Hilti vacuum cleaner when working on mineral materials.
Manual page author
Emily Carter
User documentation editor
Prepares concise manual descriptions and highlights the most useful setup, operation, and maintenance information for readers.