Core Drill Arbors

About Core Drill Arbors

Core drill arbors are precision-engineered adapter components that connect diamond core drill bits to power tools such as rotary hammer drills and specialist core drilling machines. These essential adapters transmit rotational force from your drill to the core bit whilst maintaining accurate alignment throughout the drilling process. Available in various shank configurations including SDS Plus, SDS Max, and standard round shanks, core drill arbors enable professionals and DIY enthusiasts to perform clean, circular cuts through demanding materials including brick, concrete, stone, and masonry.

MyToolShed.co.uk stocks quality core drill arbors from trusted brands including Coreplus and Draper, designed to withstand the rigours of professional site work. These arbors feature robust construction with secure bit retention mechanisms and precision-machined threads, ensuring diamond core bits remain firmly attached during operation whilst allowing quick bit changes between different diameter cores. Selecting the correct arbor with matching thread specifications and shank compatibility is fundamental to achieving professional drilling results.

Applications

Core drill arbors are essential tools for a wide range of construction and installation professionals, including:

• Electricians and Sparkies - routing cables through walls, creating openings for consumer units and mounting electrical accessories
• Plumbers and Heating Engineers - drilling holes for pipework, waste outlets, and boiler flue installations
• Builders and General Contractors - creating openings for services, ventilation, and structural penetrations in masonry
• HVAC Installers - drilling precise holes for ducting, ventilation systems, and air conditioning installations
• Kitchen and Bathroom Fitters - creating openings for extractor fans, waste pipes, and utility connections
• DIY Enthusiasts - undertaking home improvement projects requiring clean, professional-quality drilling through masonry

Choosing The Right Core Drill Arbors

Shank Compatibility: First determine which shank type your power tool accepts. SDS Plus arbors suit most modern rotary hammer drills from brands like Makita, DeWalt, Milwaukee, and Bosch. For larger professional core drilling rigs, you may require SDS Max or specialist connection types.

Thread Specification: Core drill arbors feature threaded connections that must match your diamond core bits. Common thread sizes include 1/2" BSP and M14. Check your existing core bits or consult manufacturer specifications to ensure thread compatibility across your drilling system.

Build Quality: Professional-grade arbors from Coreplus and Draper available at MyToolShed.co.uk feature hardened steel construction with precision-machined threads and robust pilot bit retention. Quality arbors provide better concentricity, reduced vibration, and extended service life.

Application Environment: For wet drilling applications, ensure your arbor accommodates water cooling systems. Dry drilling may require arbors with dust extraction compatibility, particularly when working to comply with HSE silica dust regulations.

Safety Information

Personal Protective Equipment: Always wear appropriate safety glasses, hearing protection, and dust masks rated for construction dust when core drilling. Respirators are mandatory when dry drilling to protect against respirable crystalline silica, as specified by HSE COSHH regulations.

Secure Connections: Verify that core bits are firmly threaded onto the arbor and that the arbor is fully seated in your power tool before commencing work. Loose connections can result in dangerous tool detachment during operation.

Electrical Safety: When working with 240V power tools, ensure equipment is properly earthed and connected through an RCD (residual current device). Always use a cable and pipe detector before drilling to identify hidden electrical cables, gas pipes, and water services within walls.

Frequently Asked Questions

What's the difference between SDS Plus and SDS Max arbors?

SDS Plus arbors feature a 10mm shank diameter designed for standard rotary hammer drills, typically suitable for core bits up to 150mm diameter. SDS Max arbors have an 18mm shank for heavy-duty drilling machines and larger diameter core bits. Choose based on your power tool's chuck type and the scale of drilling work you undertake.

Can I use any core bit with my arbor?

No, core bits and arbors must have matching thread specifications to connect safely. Common threads include 1/2" BSP and M14. Always verify thread compatibility before purchasing to prevent dangerous tool detachment during operation.

How do I know when to replace my core drill arbor?

Replace arbors showing thread damage, bent shafts, worn pilot bits, or any deformation affecting secure bit retention. If core bits wobble during operation or don't thread smoothly, inspect your arbor immediately. Damaged arbors compromise drilling accuracy and safety.