Chisel Bits

About Chisel Bits

Chisel bits are essential power tool accessories designed for demolition, breaking, and chipping work across concrete, masonry, tiles, and hard materials. Unlike drill bits that rotate to create holes, chisel bits utilise the hammering action of rotary hammers and breakers to chip away material efficiently. MyToolShed.co.uk stocks a comprehensive range of chisel bits across three main categories: SDS Plus for standard rotary hammers, SDS Max for heavy-duty demolition hammers, and Hex Shank variants for impact drivers and lighter applications.

The effectiveness of any chisel bit depends on matching the correct shank type to your power tool and selecting the appropriate profile for your specific task. From pointed tips for precision breaking to wide flat chisels for rapid material removal, each design serves distinct demolition scenarios. Quality chisel bits from manufacturers like Bosch, Makita, DeWalt, and Milwaukee are manufactured from hardened steel alloys engineered to withstand intense vibration and impact forces during demanding site work.

Applications

Chisel bits are indispensable across numerous trades and applications:

• Builders and General Contractors: Demolition work, removing concrete, and surface preparation during renovations
• Electricians (Sparkies): Chasing out walls and floors for cables, conduit, and back boxes in masonry
• Plumbers: Creating channels for pipework through brick, block, and concrete structures
• Tilers: Removing old ceramic and porcelain tiles without damaging substrates
• Groundworkers: Breaking up concrete, tarmac, and compacted surfaces during site preparation
• Stonemasons: Precision shaping and dressing of stone blocks and masonry elements
• DIY Enthusiasts: Home renovation projects including kitchen refits, bathroom updates, and landscaping

Choosing The Right Chisel Bits

Match the Shank Type: Ensure your chisel bit matches your power tool's chuck system. SDS Plus fits most standard rotary hammers in the 2-5kg class, SDS Max suits larger demolition hammers over 5kg, whilst hex shank bits are designed for impact drivers and compact tools. Using incompatible fittings is dangerous and will damage equipment.

Consider the Application: Point chisels excel at precision work and starting breaks in specific locations. Flat chisels are ideal for removing tiles, render, and screed across larger areas. Clay spades are purpose-built for groundwork and trenching, whilst channelling chisels create neat grooves for cables and pipes.

Material Quality: Professional-grade chisel bits from established manufacturers offer superior durability for demanding site work. MyToolShed.co.uk stocks quality bits manufactured from high-grade steel alloys with hardened tips that maintain their edge through extended use.

Length and Impact Rating: Longer chisel bits (300-400mm) provide better reach for deep demolition work, whilst shorter variants (150-250mm) offer more control. Always ensure your chisel bit is rated for the impact energy of your rotary hammer to prevent dangerous breakage.

Safety Information

Always wear appropriate PPE including safety goggles or face shields to protect against flying debris, heavy-duty work gloves, and steel toe-capped boots. Respiratory protection is essential when chiselling produces dust, particularly with materials containing crystalline silica controlled under COSHH regulations.

Inspect chisel bits before each use for cracks, excessive wear, or mushrooming. Damaged bits can shatter during operation, creating dangerous projectiles. Extended use exposes operators to hand-arm vibration (HAV), so follow HSE guidance on exposure limits and take regular breaks. Where possible, use integrated dust extraction or compatible vacuum systems to control harmful airborne particles.

Frequently Asked Questions

What's the difference between SDS Plus and SDS Max chisel bits?

SDS Plus bits have a 10mm diameter shank for rotary hammers in the 2-5kg range, suitable for general building work. SDS Max bits feature an 18mm shank for heavy-duty demolition hammers over 5kg. The two systems are not interchangeable, so you must match the bit type to your specific tool.

How long should a chisel bit last?

Professional-grade bits from Bosch, Makita, or Milwaukee can last months or years with proper care in typical building work. However, intensive demolition of reinforced concrete will wear bits more rapidly. Replace bits when cutting edges become rounded, cracks appear, or breaking efficiency decreases noticeably.

Why does my chisel bit keep slipping out of the chuck?

This usually indicates worn chuck mechanisms or insufficient lubrication on the SDS shank. Clean the bit shank thoroughly and apply specialist SDS grease before inserting. Ensure you push the bit fully home until it locks with a positive click. If problems persist, the chuck mechanism may need professional servicing.