Hilti SF 151-A / SFH 151-A Cordless Drill Driver User Manual

Product Description

The Hilti SF 151-A is a professional-grade, hand-held cordless drill/driver designed for driving and removing screws, and drilling into steel, wood, and masonry. The SFH 151-A model adds hammer drilling capabilities for concrete and masonry. These tools are intended for professional use by trained personnel in construction, workshop, and renovation environments.

Technical Specifications

• Rated Voltage: 15.6 V DC
• Chuck: Quick-release chuck (1.5–13 mm)
• Weight (EPTA 01/2003): 2.7 kg (SF 151-A), 2.9 kg (SFH 151-A)
• Speeds: 3-speed gear selector (SFH 151-A) or 2-speed (SF 151-A)
• Torque: Max 33 Nm (soft), 70 Nm (hard)

Safety Guidelines

General Safety: Always wear personal protective equipment, including eye protection, a hard hat, ear protection, and a dust mask. Keep the work area clean and well-lit. Avoid accidental starting by ensuring the switch is in the off position before inserting the battery.

Battery Safety: Use only specified Hilti batteries (SFB 150/155). Keep batteries away from metal objects to prevent short circuits. If battery fluid leaks, avoid contact and seek medical help if it reaches the eyes.

Operation

Before use, ensure the battery is fully charged. To insert, slide the battery into the tool until it clicks. Use the forward/reverse switch to select rotation direction; the middle position acts as a safety lock. Adjust the torque and mode setting ring to select between drilling, hammer drilling (SFH 151-A), or screwdriving modes.

Maintenance

Keep the tool and its grip surfaces clean and free from oil and grease. Do not use silicone-based cleaning agents. Regularly check ventilation slots and keep them clear. Repairs to electrical components must be performed only by trained electrical specialists. Maintain battery contacts by keeping them free of dust and grease.

Troubleshooting

• Tool does not run: Check if the battery is fully inserted or discharged.
• No hammering action: Ensure the mode ring is set to the hammer drilling symbol.
• Overheating: Stop immediately, remove the battery, and contact Hilti service.

Disposal

Do not dispose of power tools or batteries in household waste. Follow national regulations for recycling or return the equipment to Hilti for environmentally friendly disposal.