Diamond Crown HEX 35 mm core drill bit by MILWAUKEE

MILWAUKEE Diamond Crown HEX 35 mm core drill bit by MILWAUKEE is a 35 mm diamond-tipped core bit engineered for drilling precise circular holes in masonry, concrete and other hard mineral materials. The bit is intended for use with compatible rotary tools that accept a HEX connection and provides consistent cutting performance for plumbing, electrical and general installation tasks where clean, accurately sized round holes are required.

Advantages

The HEX shank ensures a secure, slip-resistant connection with compatible drills and rotary adapters, reducing wobble and improving hole accuracy. Diamond cutting segments deliver durable abrasive performance and maintain cutting speed on reinforced concrete and masonry. The 35 mm diameter produces uniform round openings suitable for pipework, conduit and anchor installation, while the segment design helps with debris removal and cooling during use.

Suitable for

• Drilling round holes for plumbing pipes and fixtures
• Creating openings for electrical conduits and cable glands
• Installing anchors, sleeves and through-holes in concrete and masonry
• Cutting holes for ventilation ducts and small service penetrations

Key specifications

• Cutting diameter: 35 mm
• Tip material: diamond segments
• Shank type: HEX connection for secure fit
• Intended materials: masonry, concrete and other hard mineral substrates
• Typical use: wet or dry core drilling depending on tool and application

How to use

Fit the Diamond Crown HEX 35 mm core drill bit into a compatible rotary drill or core drill adapter with a matching HEX connection and ensure it is tightened securely. Mark the drilling location and, if possible, start with a pilot guide or center punch to stabilize the bit. Begin drilling at low speed to establish the cut, then increase speed and apply steady, even pressure. For hard or reinforced materials, use intermittent backing-off to clear debris and reduce heat. Follow the tool manufacturer’s guidance on using water for cooling and dust control where appropriate.

Usage recommendations

Use appropriate personal protective equipment such as eye protection, gloves and respiratory protection when cutting masonry or concrete. When possible, use water cooling to extend bit life and reduce dust; if using dry drilling, pause regularly to allow cooling and remove dust. Match drill speed and feed pressure to the material hardness and the host tool’s specifications to achieve clean, accurate holes and prolong bit performance.