Diamond Crown RM-TX 1 1/4" 132mm x 300mm dry diamond tool, Flex-compatible

Diamond Crown RM-TX 1 1/4" 132mm x 300mm dry diamond tool from Flex is a purpose-built core bit for dry cutting and core drilling in dense building materials. Designed to fit 1 1/4" connections and produced under the DISTAR Diamond Crown line, this core bit combines a 132 mm cutting diameter with a 300 mm cutting depth to meet common requirements for hole making and core extraction on construction sites where water cooling is not available or practical.

Advantages

The RM-TX dry diamond tool provides efficient dry drilling performance on hard substrates while preserving segment integrity through optimized diamond distribution and bond formulation. Its size and connection make it compatible with standard 1 1/4" rotary and core drilling equipment, enabling straightforward assembly and replacement. The construction allows for reliable dust removal when used with appropriate dust-extraction methods and helps maintain cutting speed and life in dry conditions.

Suitable for

• Core drilling in concrete, reinforced concrete and masonry.
• Creating holes for anchors, piping, and cable passages.
• Site work where wet cooling is impractical and dry operation is required.
• Use with 1 1/4" compatible handheld and stand-mounted core drills.

When it may not be suitable

This dry diamond core bit is not intended for prolonged continuous drilling in exceptionally abrasive mixes without periodic inspection, as dry operation generates higher heat and wear than wet cutting. For tasks that require the lowest possible dust emission or where manufacturers recommend wet cooling for maximum segment life, a wet diamond core bit or water-cooled method may be preferable.

Key specifications

• Cutting diameter: 132 mm
• Cutting depth (length): 300 mm
• Connection: 1 1/4" thread
• Operation mode: dry cutting / dry core drilling
• Suitable materials: concrete, reinforced concrete, masonry

How to use

Mount the Diamond Crown RM-TX core bit onto a compatible 1 1/4" arbor and secure it according to the drill manufacturer's instructions. When drilling, start at low speed to seat the bit and then increase speed within the recommended RPM range for the drill and bit size. Use intermittent operation and light pressure to reduce heat build-up: withdraw the bit periodically to clear dust and allow cooling. Employ a dust-extraction system or local vacuum where possible to remove debris and improve visibility and safety during dry drilling.

What to consider before purchase

• Confirm that your drill or core rig accepts a 1 1/4" threaded connection.
• Assess whether dry operation is acceptable for your material and site conditions.
• Plan for dust control (extraction or HEPA vacuum) when working indoors or in confined spaces.
• Verify the required cutting diameter and depth match your application needs.

Usage recommendations

To extend bit life during dry drilling, use moderate feed pressure, pause regularly to clear dust and cool the segments, and combine with a suitable dust-extraction system. Inspect the bit for wear and segment condition after each job, and replace if excessive wear or damage is observed.