Diamond crown drill bit Flex DISTAR RM-TX 1 1/4" (62 mm) x 300 mm, dry drilling

Diamond crown drill bit Flex DISTAR RM-TX 1 1/4" (62 mm) x 300 mm is a dry drilling core bit designed for cutting and removing cores in masonry, concrete and natural stone where wet cooling is not feasible. The bit has a 62 mm cutting diameter and 300 mm overall length with a 1 1/4" thread connection compatible with standard rotary drills and core drilling rigs that accept this thread. Its segmented diamond crown geometry provides efficient material removal and extended tool life under dry operating conditions.

Advantages

The diamond-segmented crown delivers fast cutting rates and consistent core extraction while minimizing heat buildup during dry drilling. Robust steel body construction ensures straightness and resistance to bending during use. The standard 1 1/4" thread makes the bit compatible with a wide range of handheld rotary drills and lightweight core drilling rigs. Designed specifically for dry operation, the bit eliminates the need for water supply on jobs where wet drilling is impractical.

Suitable for

• Drilling cores in masonry and brickwork
• Making holes in concrete for installations and anchor points
• Cutting openings in natural stone and tile where water cannot be used
• Renovation and repair tasks requiring dry core extraction

Key specifications

• Cutting diameter: 62 mm (1 1/4")
• Overall length: 300 mm
• Connection: 1 1/4" threaded
• Operation mode: dry drilling
• Material type: diamond-segment crown on steel body

How to use

Select a rotary drill or core drilling rig that accepts a 1 1/4" threaded bit and is rated for core drilling in masonry or concrete. Mark the drilling position and secure the workpiece or ensure stable drill positioning. Fit the diamond crown bit and tighten the connection according to the drill manufacturer’s instructions. Start drilling at low speed to establish the cut, then apply steady, moderate pressure and maintain consistent rotation speed suitable for dry diamond drilling. Periodically withdraw the bit to remove debris and allow the tool to cool. Avoid excessive force and prolonged continuous operation to reduce overheating and wear.

Usage recommendations

Use appropriate personal protective equipment including eye protection, dust mask or respirator, and hearing protection. Employ dust extraction or intermittent drilling with frequent breaks when working in enclosed areas to limit dust exposure. Inspect the bit regularly for segment wear and replace when cutting performance decreases or segments become damaged.