What to do if all 4 LEDs blink on my Hilti AG 125-A22?
If all 4 LEDs are blinking and the Hilti Grinder doesn't run, it likely means the tool has been overloaded. To resolve this, release the control switch, then press it again, and let the grinder run under no load for about 30 seconds.
Why is 1 LED blinking on my Hilti AG 125-A22 and it won't run?
If 1 LED blinks and the Hilti Grinder doesn't run, it could be due to a low battery. Try changing the battery and charging the empty one. Alternatively, the battery might be too hot or too cold; allow it to cool down or warm up slowly to room temperature.
Why does the motor have no braking effect on my Hilti AG 125-A22?
If the motor on your Hilti Grinder has no braking effect, this could be due to a low battery. Try changing the battery and charging the empty one. It could also be that the power tool was briefly overloaded, in which case you should release the control switch and then press it again.
What to do if the battery doesn’t engage with an audible click on my Hilti Grinder?
If the battery doesn’t engage with an audible click on your Hilti Grinder, the retaining lugs on the battery may be dirty. Clean the retaining lugs and refit the battery.
How to increase the power of my Hilti AG 125-A22?
If the Hilti Grinder doesn't achieve full power, it might be due to using a battery with inadequate capacity. Try using a battery with adequate capacity.
Why does the battery on my Hilti AG 125-A22 Grinder drain so fast?
If the battery on your Hilti Grinder runs down more quickly than usual, it may be due to a very low ambient temperature. Allow the battery to warm up slowly to room temperature.
Details the importance of reading the manual before operating the product for safe use.
Defines warning signal words (Danger, Warning, Caution) and explains document/illustration symbols.
Illustrates and explains symbols that are physically present on the power tool itself.
Covers product identification, type designation, and declaration of conformity.
Provides essential safety guidelines and warnings for general power tool operation.
Covers operator safety, proper tool usage, power tool care, and battery handling.
Addresses kickback prevention and detailed safety for abrasive cutting operations.
Guidelines for the proper use, storage, and care of Li-ion batteries.
Visual guide identifying all parts and components of the angle grinder with numbered labels.
Defines the product's specific applications, limitations, and supplied items.
Details motor protection, guards, dust hoods, and battery status indicators.
Lists approved disc types, applications, and their compatibility with equipment.
Presents essential technical data, noise, and vibration information.
Step-by-step instructions for correctly inserting and removing the battery.
Procedures for attaching side handles, guards, and front covers.
Instructions for fitting and removing accessory tools using standard or Kwik lock nuts.
Step-by-step guide for installing the core bit accessory onto the tool.
Guidance on performing grinding, cutting, and rough grinding tasks safely.
How to safely turn on and off the power tool using the switch-on safety interlock.
Procedures for cleaning the tool, its components, and Li-ion batteries.
Instructions for performing regular checks for damage and ensuring proper function.
Safety measures to follow when transporting the power tool and batteries.
Recommendations for storing the tool and batteries in a safe and appropriate environment.
A guide to identifying and resolving common problems encountered with the tool.
Specific instructions and warnings for the safe and responsible disposal of batteries.
This document provides comprehensive instructions for the AG 125-A22 cordless angle grinder, designed for professional users. It covers safety, operation, maintenance, and disposal, ensuring safe and effective use.
The AG 125-A22 is a hand-held cordless angle grinder primarily intended for cutting and grinding metals and mineral materials. It can also be used for drilling tiles without water, exclusively for dry grinding/cutting applications. For working on mineral materials, such as concrete or stone, the tool must be equipped with a dust removal hood and connected to a suitable Hilti vacuum cleaner. The product is designed to be used with Hilti Li-ion batteries from the B 22 series and charged with Hilti battery chargers from the C4/36 series.
The tool incorporates a temperature-dependent motor protection system that monitors current input and motor temperature to prevent overheating. If the motor is overloaded due to excessive working pressure, the tool's performance will noticeably drop or it may stall. In such cases, the user should release pressure and allow the tool to run under no load for approximately 30 seconds to cool down.
The angle grinder features a guard release button, spindle lock button, air vents, and a release button for charge status display activation. It is equipped with a battery, a switch-on interlock release button, an on/off switch, and a vibration-absorbing side handle. The standard guard, clamping flange with O-ring, clamping nut, and wrench are included, with an optional Kwik lock clamping nut available for tool-free accessory changes.
For cutting and slitting, abrasive cutting discs (AC-D) and diamond cutting discs (DC-TP, DC-D) are suitable. For rough grinding, abrasive grinding discs (AG-D, AF-D, AN-D) and diamond grinding discs (DG-CW) can be used. Diamond core bits (DD-M14) are specified for drilling in tiles. When cutting or slitting with abrasive cutting discs, the standard guard with an additional front cover or a fully enclosing dust hood must always be used. For cutting mineral materials with diamond cutting discs, the DC-EX 125/5"C compact dust hood is recommended, but its use for metalwork is prohibited. Similarly, the DG-EX 125/5" dust hood for grinding is suitable for occasional use with diamond cup wheels on mineral materials, but not for metal.
The Li-ion battery charge status is indicated by four LEDs after pressing one of the battery release buttons. Four LEDs signify 75-100% charge, three LEDs 50-75%, two LEDs 25-50%, one LED 10-25%, and a blinking LED indicates less than 10% charge. The charge status cannot be displayed during or immediately after operation.
To insert the battery, ensure the angle grinder is switched off and the safety lock is activated. Check that battery terminals and tool contacts are clean and free from foreign objects to prevent short circuits. Securely fit the battery to prevent it from falling out. Removing the battery involves pressing the release buttons and pulling it out.
The side handle can be screwed into one of the threaded bushings for improved grip and control. The guard is fitted by aligning its triangular marks with those on the power tool, pressing it onto the drive spindle collar, and rotating until it engages. To adjust the guard, press the release button and rotate it to the desired position. Removing the guard involves rotating it back to the alignment marks and pulling it off. The front cover clips onto the standard guard and is removed by releasing its catch. When positioning the DC-EX 125/5"C dust hood, ensure the on/off switch remains easily accessible.
Fitting an accessory tool requires removing the battery, checking the O-ring on the clamping flange for damage, and fitting the clamping flange onto the drive spindle. The accessory tool is then placed, and the clamping nut is screwed on. The spindle lock button is pressed, and the clamping nut is tightened securely with a pin wrench. When using a Kwik lock nut, it is screwed on until seated, with the "Kwik lock" name visible. The accessory tool is then turned clockwise by hand until the nut is securely tightened. Removing an accessory tool involves pressing the spindle lock button and turning the clamping nut counterclockwise with a wrench or by hand for the Kwik lock nut. For core bits, after fitting the side handle and guard, the core bit is placed and hand-tightened, then the arbor lock button is pressed, and the core bit is tightened with an open-end wrench.
For grinding, the tool should be held securely with both hands using the side handle. When cutting, moderate feed pressure should be applied, and the tool should be held at approximately 90° to the surface. For rough grinding, move the tool to and fro at a 5° to 30° angle of attack with moderate pressure to prevent overheating and ensure an even finish. The on/off switch with a safety lock prevents unintentional starting; push the safety lock forward to unlock, then press the switch. Release the switch to turn off the tool, and the safety lock will automatically engage.
Regular care and maintenance are crucial for the tool's longevity and safety. Always remove the battery before performing any maintenance tasks. Stubborn dirt should be carefully removed from the tool, and air vents cleaned with a dry brush. The casing should be cleaned with a slightly damp cloth, avoiding silicone-containing cleaning agents that could damage plastic parts.
For Li-ion batteries, keep them free from oil and grease, clean the casing with a slightly damp cloth (again, avoiding silicone-containing agents), and prevent moisture ingress.
All visible parts and controls should be checked regularly for damage and proper function. If any damage or malfunction is found, the cordless tool should not be operated and must be repaired by Hilti Service immediately. After cleaning and maintenance, all guards and protective devices must be refitted and checked for correct function.
For disposal, Hilti tools and appliances are recyclable. Materials should be separated for recycling, and old tools can be returned to Hilti for this purpose. Batteries should always be removed before transport and storage. They should be transported individually packaged, never loose, and their terminals covered with non-conductive material to prevent short-circuiting. Batteries should be disposed of out of reach of children, at a Hilti Store, or according to local governmental guidelines. The tool and batteries should be stored in a cool, dry place, away from direct sunlight, heating units, or windows, and inaccessible to children or unauthorized persons. Before use after long storage periods, check the tool and batteries for damage.
General| Idle speed (max) | 9500 RPM |
|---|---|
| Cutting depth (max) | 34 mm |
| Sound pressure level | 83 dB |
| Grinding disc diameter | 125 mm |
| Vibration level (grinding) | 3.8 m/s² |
| Product color | Black, Red |
| Country of origin | China |
| Input power | - W |
| Power source | Battery |
| Battery voltage | 21.6 V |
| Battery included | Yes |
| Number of batteries included | 1 pc(s) |
| Number of shipping (inner) cases per master (outer) case | 20 pc(s) |
Weight and Dimensions| Weight | - g |
|---|---|
| Package depth | 200 mm |
| Package width | 500 mm |
| Battery weight | 100 g |
| Package height | 150 mm |
| Package weight | 500 g |
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