COOLMAN DORAI Series Premium Handheld Dry Core Bit
Heavy-Duty Laser-Welded Dry Core Bit for Fast and Convenient Handheld Drilling
Specification
⚠ Do NOT use impact/hammer mode.
⚠ Wear approved safety glasses, gloves, and hearing protection.
⚠ Ensure the core bit is securely attached before operation.
⚠ Do not exceed the recommended RPM.
⚠ Allow the core bit to cool during extended drilling.
⚠ Inspect the core bit for damage before use.
⚠ Keep hands clear of rotating parts during operation.
The COOLMAN DORAI Series Handheld Dry Core Bit is a premium one-piece dry core bit engineered for fast and efficient drilling using SDS Plus rotary hammers. Manufactured with Element Six (E6) synthetic diamonds, laser-welded segments, and a heavy-duty steel core, the DORAI Series delivers outstanding durability, stability, and cutting performance. Designed for dry drilling applications, it is ideal for contractors requiring quick hole creation without the need for water supply. Suitable for drilling concrete, blocks, bricks, pavers, sandstone, and other construction materials.
Features
- Premium Element Six (E6) Synthetic Diamonds
- One-Piece Core Bit Construction
- Laser-Welded Segment Technology
- Heavy-Duty Steel Core Design
- Fast & Smooth Dry Drilling Performance
- High Heat Resistance
- Enhanced Stability During Drilling
- Long Service Life
- Suitable for SDS Plus Rotary Hammers
- Maximum Working Length: 200mm
- M14 to SDS Plus Spindle Adaptor Included
- Professional Contractor Grade Quality
Applications
- Concrete
- Green Concrete
- Bricks
- Blocks
- Sandstone
- Pavers
- Premix Concrete
- General Construction Work
- Plumbing Installation
- Electrical Conduit Installation
- Air Conditioning Installation
Recommended RPM Guide
| Core Bit Diameter | Recommended RPM |
|---|---|
| 25mm | 1,500 - 2,000 RPM |
| 38mm | 1,200 - 1,800 RPM |
| 52mm | 1,000 - 1,500 RPM |
| 63mm | 800 - 1,200 RPM |
| 76mm | 600 - 1,000 RPM |
Safety Warning
⚠ Use with SDS Plus rotary hammer in drilling mode only.
⚠ Do NOT use impact/hammer mode.
⚠ Wear approved safety glasses, gloves, and hearing protection.
⚠ Ensure the core bit is securely attached before operation.
⚠ Do not exceed the recommended RPM.
⚠ Allow the core bit to cool during extended drilling.
⚠ Inspect the core bit for damage before use.
⚠ Keep hands clear of rotating parts during operation.
Why Choose COOLMAN DORAI Series?
- Premium Element Six diamonds for superior cutting performance.
- Heavy-duty steel core for maximum durability and stability.
- Laser-welded segments for enhanced safety and reliability.
- Fast dry drilling without requiring water supply.
- Ideal for service contractors and renovation work.
- One-piece construction reduces vibration and improves strength.
- Suitable for common SDS Plus rotary hammers.
- Trusted by professionals for efficient everyday drilling applications.