285937 - Angle Grinder HILTI - Free user manual and instructions
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| Product Type | Angle grinder |
| Brand | Hilti |
| Model | 285937 |
| Disc Diameter | 125 mm (5") |
| Power Input | 1500 W |
| No-Load Speed | 11,000 rpm |
| Rated Voltage | 220-240 V AC |
| Frequency | 50/60 Hz |
| Spindle Thread | M14 |
| Max Cutting Depth | 33 mm |
| Max Grinding Depth | 30 mm |
| Weight | 2.4 kg |
| Tool Dimensions (L x W x H) | 350 x 110 x 120 mm |
| Side Handle | Two-position, anti-vibration |
| Guard Adjustment | Keyless, 360° rotation |
| Motor Type | Brushed motor |
| Protection Class | Class II (double insulated) |
| Safety Features | Restart protection, soft start, overload protection |
| Noise Level | 88 dB(A) |
| Vibration Level | 5.5 m/s² |
| Power Cord Length | 2.5 m |
| Supplied Accessories | Side handle, grinding guard, spanner |
| Maintenance | Replace carbon brushes when worn; clean air vents regularly |
| Spare Parts Availability | Genuine Hilti spare parts and accessories |
Frequently Asked Questions - 285937 HILTI
What is the correct way to install a cutting or grinding disc on this angle grinder?
First disconnect the grinder from the power supply. Use the spindle lock to hold the shaft, remove the flange nut with the supplied spanner, place the disc on the spindle, and refit the nut. Tighten securely, ensuring the disc rotates in the correct direction as indicated by the arrow.
Can I use this grinder for cutting metal and concrete?
Yes, the 125-mm grinder can cut both metal and concrete when fitted with the appropriate cut-off disc. For concrete, use a diamond cutting disc; for metal, use a reinforced cut-off disc. Always respect the maximum cutting depth of 33 mm and avoid forcing the tool.
What safety precautions should I take before starting work?
Always wear eye protection, ear protection, and gloves. Check the condition of the disc for cracks or damage before use. Ensure the guard is in place and adjusted to direct sparks away from your body. Use the side handle for two-handed control, and keep the power cord away from the rotating part.
How often should I clean the air vents?
Regularly clean the air vents with a dry brush or compressed air to prevent dust clogging. Cleaning after each heavy use is recommended, as blocked vents can cause overheating and reduced performance.
Why does my grinder stop working unexpectedly?
The grinder is equipped with restart protection and overload protection. It may stop automatically after a power interruption or if the motor overheats. Wait for the tool to cool down and press the on/off switch again. Check for blocked vents or a damaged disc.
How do I adjust the anti-vibration side handle?
Loosen the clamping ring on the side handle by turning it counterclockwise, rotate the handle to a comfortable position on either side of the grinder, and retighten it. The handle can be installed in two positions (left or right) for optimal control.
What is the correct technique to avoid kickback?
Use a steady feed pressure and do not tilt the disc sidewise in the cut. Start the cut with the grinding surface flat, allow the tool to reach full speed before contact, and maintain a firm grip with both hands. Avoid trapping the disc in the workpiece.
Can I use this grinder with a dust extraction vacuum?
Yes, connect a suitable dust extraction system to the dust port on the guard (if equipped) or use a compatible Hilti dust hood. Using dust extraction reduces health risks and keeps the work area clean. Check that the vacuum is rated for mineral dust.
How do I replace the carbon brushes?
The carbon brushes are located on the motor housing. Remove the brush caps with a screwdriver, withdraw the worn brushes, and insert new genuine Hilti brushes. Replace both brushes when they are shorter than 5 mm to ensure proper motor contact.
What type of grinding discs are compatible with this model?
This grinder accepts standard 125 mm discs with a 22.2-mm bore and a maximum thickness of 3 mm for cutting and 6 mm for grinding. Use only reinforced discs rated for 11,000 rpm or higher. Always check the disc's maximum speed marking.
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USER MANUAL 285937 HILTI
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Product information
Brand : HILTI
Model : 285937
Category : Angle Grinder