Tools / Power Tools
Hilti DD 150-U Diamond Core Drilling Machine User Guide
Quick guide for the Hilti DD 150-U diamond core drilling machine, covering setup, operation, maintenance, and troubleshooting.
Table of contents
Manual images
Jump to the sectionQuick guide from the manual
The Hilti DD 150-U is a professional-grade diamond core drilling machine designed for wet and dry drilling in mineral substrates. This guide provides essential information for safe and efficient operation.
Safety Warnings
- Always wear personal protective equipment: Eye protection, hard hat, ear protection, protective gloves, and safety footwear are mandatory.
- Electrical Safety: Always use the supplied PRCD (Portable Residual Current Device). Test the PRCD before each use.
- Drilling Overhead: Use of a water collection system with a wet-type industrial vacuum extractor is mandatory for upward wet drilling.
- Stability: Ensure the drill stand is securely anchored or vacuum-secured to a smooth, clean, non-porous surface.
Setup and Installation
- Securing the Drill Stand: Use Hilti metal expansion anchors (M12 or M16) or a vacuum base plate on suitable surfaces.
- Mounting the Machine: Lock the carriage, mount the hand wheel, engage the interface plate onto the drill stand hook, and tighten the locking pin.
- Water Connection: Connect the water supply to the water swivel/suction head. Ensure water pressure does not exceed 6 bar.
- Core Bit Installation: Ensure the core bit is securely tightened in the chuck. For BI+ tool holders, push and turn until it engages.
Operation
- Hole-Starting Mode: Use this mode for low-vibration starts with large-diameter core bits. It automatically switches off after 2 minutes.
- Continuous Running Lock: Can be used for stand-guided drilling. Never use in hand-guided mode.
- Speed Selection: Select the gear based on the core bit diameter. Turn the gear selector while manually rotating the core bit to ensure it latches.
Maintenance
- Carbon Brushes: The service display indicates when carbon brushes need replacement. Always replace all brushes simultaneously.
- Cleaning: Clean air vents with a dry brush. Do not use silicone-based cleaning agents.
- Storage: Store in a dry place, unplugged, and out of reach of children.
Troubleshooting
- Display blank: Check PRCD, power supply, and ensure no water has entered the motor.
- Restart interlock: Switch the machine off and on again. Check for overload or overheating.
- Core bit jammed: Use an open-end wrench to release the bit or move the carriage up and down if using a drill stand.
Manufacturer information
Hilti Corporation
Practical help
Common problems
Multifunction display is blank
Check if PRCD is switched on, verify power supply, and ensure no water has entered the motor.
Restart interlock active
Switch the machine off and on again. Check for overload or overheating.
Core bit jammed
Use an open-end wrench to release the bit or move the carriage up and down if using a drill stand.
Drilling progress decreases
Check for polished diamond segments, wrong gear, low contact pressure, or dust in the core bit.
Before use
- Read and understand all safety warnings.
- Ensure the drill stand is securely anchored or vacuum-secured.
- Test the PRCD before each use.
- Check that the core bit is securely tightened.
- Ensure water supply is connected and pressure is within limits (≤ 6 bar).
Specs in practice
- Max. core drilling tool diameter
- 162 mm (varies by gear and mode).
- Drilling depth
- 450 mm.
- Minimum vacuum
- 0.65 bar required for vacuum base plate.
Images and diagrams
- Page 2: Overview of the diamond core drilling machine components.
- Page 3: Overview of the drill stand and optional accessories.
- Page 4-7: Procedural diagrams for anchoring, vacuum securing, and core bit installation.
Model compatibility
- Designed for hand-guided wet and dry drilling.
- Designed for wet drilling with a drilling rig.
- Designed for dry drilling in wood with special core bits.
Manual page author
David Miller
Documentation analyst
Organizes user manual content into clear summaries, with attention to model details, product context, and everyday usability.