28mm Drill Bits

When your construction or renovation project requires large diameter clearance, our professional range of 28mm drill bits provides the heavy-duty performance you need. Built to handle extreme torque and resist wear during deep boring, these robust bits drive smoothly through tough structural materials. Whether you are sinking large anchor bolts into masonry, boring clearance holes for plumbing pipes through thick timber, or dry core drilling through brickwork, keeping a dedicated 28mm bit in your toolkit ensures you can tackle demanding installations accurately and efficiently.

We offer a comprehensive selection of 28mm profiles engineered for specific materials and power tools. Choose from high-performance SDS plus and SDS max masonry bits designed to power through dense concrete and blockwork with minimal vibration. For fast and clean timber clearance, our 28mm range includes extreme flat wood and tri-flute bits. If you are working with hard masonry or ceramics, we also supply specialised dry diamond core drill bits and hole cutters. Ensure top-tier results with stock from trusted, trade-quality brands like Bosch, DeWalt, Toolpak, and Mexco.

Frequently Asked Questions | FAQs

What is a 28mm diamond core drill bit used for?

A 28mm diamond core drill bit is specifically designed to cut clean, precise holes through hard materials like brick, blockwork, concrete, and ceramic tiles without causing damage or cracking. It is commonly used by plumbers and electricians for routing pipes and thick cables through structural masonry walls.

Can I use a 28mm SDS Max drill bit in a standard hammer drill?

No, an SDS Max drill bit features a thick, slotted shank designed exclusively for the heavy-duty chucks of SDS Max rotary hammers. It will not fit into a standard 3-jaw chuck or an SDS Plus drill. You must always ensure you match the shank type of the 28mm drill bit to your specific power tool.

What is the best 28mm drill bit for drilling through timber joists?

For rapidly drilling 28mm holes through structural timber, a tri-flute wood bit or a heavy-duty flat wood bit (spade bit) is ideal. Tri-flute designs offer exceptionally fast cutting speeds and efficient waste removal, making them perfect for routing large cables or plumbing pipes through thick joists without bogging down the drill.