Magnetic Drill Bits

About Magnetic Drill Bits

Magnetic drill bits are specialised cutting tools designed for use with magnetic drilling machines, engineered to create precise holes in metal materials including steel, iron and stainless steel. MyToolShed.co.uk stocks a comprehensive range of magnetic drill bits from leading manufacturers including Fein, Rotabroach and Sealey, offering solutions for everything from standard drilling operations to specialist applications requiring countersinking, tapping and core cutting capabilities.

Our selection includes HSS (High-Speed Steel) cutters, carbide-tipped bits, HM Ultra core drills and TCT (Tungsten Carbide Tipped) options, available as individual bits or convenient multi-piece sets. These professional-grade drill bits feature quick-change systems like QuickIN holders for efficient bit changes, whilst various coatings such as TiN (Titanium Nitride) provide enhanced durability and heat resistance for demanding metalworking tasks.

Applications

Magnetic drill bits are essential tools for professionals working across numerous industries and trades:

• Steel fabrication and welding – Creating fixing holes in structural steelwork and metal frameworks
• Construction and civil engineering – Installing fixings in steel beams, girders and reinforcement
• Mechanical engineering – Precision drilling in machinery, equipment housings and metal components
• Electrical installation – Drilling cable entry points in metal enclosures and distribution boards
• Maintenance and repair – Creating new fixing points in existing metal structures
• Shipbuilding and offshore – Heavy-duty drilling in marine-grade steel and thick metal plates
• Rail and transport – Manufacturing and maintenance work on rolling stock and infrastructure

Choosing The Right Magnetic Drill Bits

Selecting appropriate magnetic drill bits depends on several key factors. Material composition is crucial – HSS bits suit general steel drilling, whilst carbide and HM Ultra options provide superior performance in harder materials or extended production runs. Consider the cutting diameter required for your application, with MyToolShed.co.uk offering sizes ranging from pilot drill bits through to large-diameter core cutters exceeding 50mm.

Cutting depth varies between models, with standard depths of 30mm, 50mm or 75mm available depending on material thickness. The shank type must match your magnetic drill – popular systems include Weldon shanks, QuickIN quick-change formats and universal fitments. For efficiency, multi-piece sets offer excellent value and cover common diameter ranges, whilst specialist bits like countersinks, tapping tools and TCT cutters suit specific applications. Finally, consider coating options such as TiN for improved wear resistance when working with abrasive or hard materials.

Frequently Asked Questions

What's the difference between HSS and carbide magnetic drill bits?

HSS (High-Speed Steel) bits are suitable for general steel drilling and offer good value for standard applications. Carbide-tipped and HM Ultra bits are significantly harder and more heat-resistant, making them ideal for drilling harder materials, stainless steel, or high-volume production work where extended tool life justifies the higher initial cost.

Can I use standard twist drills with a magnetic drilling machine?

Whilst magnetic drills can accommodate standard twist drills for pilot holes and smaller diameters, annular cutters (core drills) are specifically designed for magnetic drill use and offer superior performance. They remove only a ring of material rather than the entire hole, requiring less power and producing faster, cleaner results with less waste.

How do I maintain magnetic drill bits for longevity?

Keep bits clean and free from metal swarf after each use, store them in protective cases to prevent damage to cutting edges, and always use appropriate cutting lubricant during operation. Inspect bits regularly for wear or damage, and ensure they're properly secured in the magnetic drill chuck to prevent slippage which can damage both bit and workpiece.