DD 250 Core drill
Advanced heavy-duty diamond drilling tool for very small to large diameters of 12-450 mm (1/2" - 18”)
- Diameter range: 15/32 - 17-23/32 in
- Base material: Concrete
- Operation mode: Rig-based drilling system
Technical Data
Diameter range
15/32 - 17-23/32 in
Base material
Concrete
Operation mode
Rig-based drilling system
Number of gears
4
No load RPM
gear 1: 240 rpm; gear 2: 580 rpm; gear 3: 1160 rpm; gear 4: 2220 rpm
Weight according EPTA-Procedure 01/2003 without battery
33.7 lb
Weight of complete system
81 lb
Dimensions (LxWxH)
24.8 x 7.5 x 8.5 in
A-weighted emission sound pressure level
93 dB (A) 1
Tri. vibr. value for drilling into concrete (wet) with diamond core A (ah,DD)
2.5 m/s²
Tri. vibr. value for drilling into concrete (wet) (ah,DD) - Corebit A
HCL/HCS
Corner accessibility
2 in
- According to the applicable product standard (see the Operating Instruction for more details)
Documents
Features & Applications
Features
- Air-cooled, heavy-duty drive unit with four-speed gearing and convenient controls
- Optional BL quick-release connection lets you change core bits in seconds - no tools required (keyless system)
- Hole-starting function for large-sized core bits
- Real-time information display – digital spirit level, gear selector, power control function, trip counter, running time counter and easily understood service messages
- Designed for versatility – suitable for an extremely wide range of applications
Applications
- Penetrations for ducts, pipes and cables
- Openings for ventilation
- Stitch drilling for breaches
- Coring holes for service entries
- Coring holes in ceilings, walls and floors without hammering and vibration
For approval or certificate information, please see individual items.
Services

Hilti Tool Service
- Service is free of charge up to 2 years, including wear & tear, pick-up and delivery
- 1 or free, in and out of the repair center the same day or repair is free of charge
- Product warranty against parts and manufacturing irregularities for 20 years
- One click or call is all it takes – we do the rest
- No registration or proof of purchase ever required

Fleet Management
- Monthly usage fee covering all tool, service and repair costs helping to ensure absolute cost control and back-office efficiency.
- Theft coverage helps to reduce financial risk and unexpected expenses.
- Individual labels and online visibility provide tool fleet transparency.
- High-performing tools and latest technology help to increase jobsite productivity.
Product Videos
Consulting & Support
Would you like an interactive demonstration of this product? Meet one of our product experts for a free and hands-on demonstration.
Use this instant messaging tool to get easy and quick access to our Customer Service team. This service is available during business hours 8:00AM to 5:00 PM CST.