Wet Diamond Core Bits – Premium P5-WC | 1¼" UNC | 450mm | Concrete & Reinforced Concrete

The Premier Diamond Products P5-WC premium wet diamond core bits are engineered for professional drilling into concrete, reinforced concrete, and hard natural stone. Featuring easy-start diamond crowns and turret-designed segments, these British-made cores deliver fast, accurate cutting across a wide range of masonry and concrete applications.

Key Features

• Easy-start diamond crowns — fast, clean entry into the material
• Turret-designed segments — optimised for cutting speed and segment life
• 450mm core length — suitable for deep drilling applications
• 1¼" UNC thread — fits all standard diamond drilling machines
• Made in Britain — Premier Diamond Products, UK manufactured
• Wet cutting — requires constant water flow (up to 4 litres/min recommended)

Suitable Materials

• Bricks — Class A & B Engineering, Standard Facing Bricks
• Clay products
• Concrete — Beams, Kerbs, Pipes & Slabs
• Concrete — Block Paving & Flag Stones
• Concrete — Flint Aggregate
• Concrete — General Purpose
• Concrete — Heavy & Light Steel Reinforcement
• Concrete Blocks — Solid Density 12+ Newton
• Hard natural stones

Usage Guidance

• Use with a suitable diamond drilling machine running at appropriate speeds (speed depends on core size and concrete strength)
• A drilling rig stand is recommended to eliminate movement, especially for larger diameters
• Smaller diameters can be used with a hand-held diamond drilling machine
• Maintain a constant water flow of up to 4 litres per minute — direct mains water feed recommended for reinforced concrete

Specifications

• Thread: 1¼" UNC
• Core length: 450mm
• Segment type: Turret-designed diamond segments
• Cutting method: Wet only
• Manufacturer: Premier Diamond Products (Made in Britain)

Using a Hilti DD100, DD120, DD130 or DD150? You'll need our Hilti to 1/2" BSP Female & 1-1/4" UNC Male Adaptor (DC11122) to connect these core bits to your machine.