Diamond Crown DISTAR RM-TX 1 1/4" 300mm x 450mm Drill core bit

Diamond Crown DISTAR RM-TX 1 1/4" 300mm x 450mm Drill core bit is a diamond-segmented core drill bit designed for wet coring with professional core drilling rigs. It has a 300 mm cutting diameter and a total length of 450 mm with a 1 1/4" thread connection. The bit is intended for producing precise circular openings in reinforced concrete, masonry and natural stone where wet drilling methods are used to control dust and cool the segments.

Advantages

The diamond-segmented rim provides efficient cutting performance and extended segment life during wet coring. A standardized 1 1/4" connection ensures compatibility with many core drilling rigs and adapters. The 300 mm diameter and 450 mm length deliver a balance between cutting depth and rigidity for stable drilling of large-diameter holes. The construction and segment bond are optimized for abrasive, reinforced materials, supporting consistent penetration rates and predictable wear under typical wet operating conditions.

Suitable for

• Creating openings in reinforced concrete for plumbing, HVAC and electrical installations
• Coring masonry and brick for retrofitting and renovation work
• Drilling natural stone for anchors, passage holes or service penetrations
• Use with rig-mounted wet core drilling machines for precise, dust-reduced cutting

Key specifications

• Cutting diameter: 300 mm
• Total length: 450 mm
• Connection type: 1 1/4" thread
• Cutting method: wet coring
• Segment type: diamond-segmented rim for reinforced concrete, masonry and stone

How to use

Install the core bit on a compatible core drilling rig using the 1 1/4" connection and secure the chuck/adapter according to the rig manufacturer’s instructions. Set up the rig on a stable base and align the drill to the desired hole position. Use continuous water feed to cool the segments and remove slurry; maintain proper feed pressure and rotation speed recommended for the host material. Advance the bit steadily without excessive force to allow the diamond segments to cut effectively. Withdraw occasionally to clear slurry when drilling deep holes and inspect the segments for wear during prolonged use.

Usage recommendations

For best results, use the bit exclusively with wet coring rigs, maintain constant water flow, and match rotational speed and feed pressure to the material being drilled. Replace the bit when cutting efficiency drops significantly or segments show advanced wear. When drilling reinforced concrete, advance slowly at rebar contact and consider using a smaller pilot bit or rebar-cutting accessory if available.