Diamond core drill bits are made for clean, high-speed boring through brick, block and masonry. Designed for dry drilling with dust extraction, they’re essential for trade install and first fix work.
Who Uses Diamond Core Drill Bits?
Used on-site daily for service entry and access:
Electricians – Drill cable runs through brick walls and concrete block.
Plumbers – Bore neat holes for waste pipe or vent install through external walls.
HVAC & Extract Installers – Fit ducts or fans through solid walls and cavities.
General Builders – Knock out cores for meter boxes, boiler flues or AC installs.
Diamond Core Drill Bits Are Great for Jobs Such As:
Drilling 110mm vent duct holes through brick
Core cutting access for waste and soil pipes
Running cables through cavity walls
Installing extraction for bathrooms or kitchens
Meter or flue installs through heavy material
How to Choose the Right Diamond Core Drill
Dry core drills work differently to standard bits – here’s how to choose the right one:
1. Diameter
Typical sizes include 38mm, 52mm, 117mm and 127mm depending on the service or pipe. Always size for sleeve + clearance.
2. Connection Type
Most dry cores use 1/2" BSP threads. Use adaptors to connect to SDS+ or hex drills with safety clutch.
3. Material & Use
Dry diamond cores are perfect for blockwork and soft brick. For reinforced or wet use, opt for a wet core kit.
Diamond Core Accessories to Keep You Drilling
Support your bits and keep your kit running smoothly with these core accessories:
1. SDS Adaptors
Connect your dry core to SDS drills or clutch-equipped tools.
2. Pilot Drills
Start holes cleanly and prevent the bit from wandering.
3. Extensions
Reach deep walls or inaccessible routes with long cores and extensions.
Frequently Asked Questions
Can I use diamond core bits on a standard drill?
You need a rotary drill with clutch protection. SDS+ drills can be adapted – but no hammer action should be used.
What size core bit for extractor fans?
110mm is most common for bathroom or kitchen fans. Always check the duct spec and manufacturer recommendation.
What’s the difference between wet and dry core drills?
Wet core drills are water-cooled and better for concrete or dense materials. Dry core is for softer brick/block and cleaner indoor use.
Do I need a pilot bit?
Pilot bits help start the hole and stop drifting. Once established, some users remove the pilot to speed up larger cuts.
Can I drill concrete with dry diamond cores?
Lightweight or block-based concrete is fine. Avoid reinforced or very dense concrete – use wet core or SDS for that.
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Diamond Core Drill Bits & Accessories
Diamond core drill bits are made for clean, high-speed boring through brick, block and masonry. Designed for dry drilling with dust extraction, they’re essential for trade install and first fix work.
Who Uses Diamond Core Drill Bits?
Used on-site daily for service entry and access:
Electricians – Drill cable runs through brick walls and concrete block.
Plumbers – Bore neat holes for waste pipe or vent install through external walls.
HVAC & Extract Installers – Fit ducts or fans through solid walls and cavities.
General Builders – Knock out cores for meter boxes, boiler flues or AC installs.
Diamond Core Drill Bits Are Great for Jobs Such As:
Drilling 110mm vent duct holes through brick
Core cutting access for waste and soil pipes
Running cables through cavity walls
Installing extraction for bathrooms or kitchens
Meter or flue installs through heavy material
How to Choose the Right Diamond Core Drill
Dry core drills work differently to standard bits – here’s how to choose the right one:
1. Diameter
Typical sizes include 38mm, 52mm, 117mm and 127mm depending on the service or pipe. Always size for sleeve + clearance.
2. Connection Type
Most dry cores use 1/2" BSP threads. Use adaptors to connect to SDS+ or hex drills with safety clutch.
3. Material & Use
Dry diamond cores are perfect for blockwork and soft brick. For reinforced or wet use, opt for a wet core kit.
Diamond Core Accessories to Keep You Drilling
Support your bits and keep your kit running smoothly with these core accessories:
1. SDS Adaptors
Connect your dry core to SDS drills or clutch-equipped tools.
2. Pilot Drills
Start holes cleanly and prevent the bit from wandering.
3. Extensions
Reach deep walls or inaccessible routes with long cores and extensions.
Frequently Asked Questions
Can I use diamond core bits on a standard drill?
You need a rotary drill with clutch protection. SDS+ drills can be adapted – but no hammer action should be used.
What size core bit for extractor fans?
110mm is most common for bathroom or kitchen fans. Always check the duct spec and manufacturer recommendation.
What’s the difference between wet and dry core drills?
Wet core drills are water-cooled and better for concrete or dense materials. Dry core is for softer brick/block and cleaner indoor use.
Do I need a pilot bit?
Pilot bits help start the hole and stop drifting. Once established, some users remove the pilot to speed up larger cuts.
Can I drill concrete with dry diamond cores?
Lightweight or block-based concrete is fine. Avoid reinforced or very dense concrete – use wet core or SDS for that.
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