SDS Drills

About SDS Drills

SDS drills, also known as rotary hammer drills, are specialised power tools designed specifically for drilling into concrete, masonry, stone and other hard materials. Unlike standard hammer drills, SDS machines use a unique chuck system that allows drill bits to move independently within the chuck, creating a more efficient hammering action with significantly greater impact energy. This makes them essential equipment for anyone regularly working with concrete or masonry, from professional construction workers to serious DIY enthusiasts tackling home renovation projects.

We stock three main types of SDS drill to suit different applications and intensity of use. SDS Quick is Bosch's compact cordless system, ideal for light-duty DIY tasks. SDS Plus machines are the most popular choice, offering excellent performance for drilling and light chiselling work, perfect for electricians, plumbers and general builders. SDS Max drills deliver heavy-duty performance for demolition work and large-diameter drilling, commonly used on construction sites and by specialist concrete contractors. Many modern SDS drills feature interchangeable chucks, allowing you to switch between SDS bits and standard drill bits for maximum versatility.

Our range includes both corded and cordless models from leading manufacturers including Bosch, DeWalt, Milwaukee and Makita. Cordless 18V platforms now offer performance rivalling mains-powered machines, giving tradespeople the freedom to work anywhere on site without trailing cables. Whether you're chasing out walls for electrics, drilling fixing holes in concrete, or removing tiles and plaster, there's an SDS drill suited to your requirements and budget.

Jargon Buster

SDS (Special Direct System)

A chuck system featuring grooved shanks that slot into the drill, allowing bits to move back and forth whilst rotating. Creates more efficient hammer action than standard drills.

Impact Energy (Joules)

Measures the force of each hammer blow. SDS Plus drills typically deliver 1.5-4J, whilst SDS Max machines produce 5-20J or more for heavy-duty applications.

Brushless Motor

Modern motor technology using electronic controllers instead of carbon brushes. Delivers greater efficiency, longer runtime on cordless models, and extended tool life with minimal maintenance.

Anti-Vibration System (AVS)

Engineering features that reduce vibration transmitted to the user, helping to prevent Hand-Arm Vibration Syndrome (HAVS) during prolonged use.

Rotating Mode Selection

Most SDS drills offer three modes: rotary hammer (drilling), hammer-only (chiselling), and rotation-only (drilling with standard bits when chuck adapter fitted).

Safety Clutch

Automatic torque-limiting feature that disengages the drive when the bit jams, preventing dangerous kickback that could injure the operator.

Who Uses SDS Drills?

SDS drills are essential tools for a wide range of trades and applications:

• Electricians - chasing out walls for cable runs, drilling through concrete and blockwork for conduit and back boxes
• Plumbers and heating engineers - drilling holes for pipework, fixing brackets and radiators to masonry walls
• Builders and general contractors - all aspects of construction work involving concrete and masonry drilling
• Groundworkers and civil engineers - heavy-duty drilling and breaking of concrete on construction sites
• Kitchen and bathroom fitters - drilling fixing holes and removing tiles during renovation work
• Shopfitters and commercial installers - fixing equipment, shelving and signage to concrete and brick walls
• Maintenance engineers - facility maintenance requiring regular concrete drilling for repairs and installations
• Fencers and landscapers - drilling into concrete posts, walls and hard ground conditions
• DIY enthusiasts - home renovation projects including extension work, patio installation and general building work

How to Choose the Right SDS Drills

SDS Type: For most tradespeople and DIY users, an SDS Plus drill offers the best balance of performance and practicality. They'll handle drill bits up to 30mm diameter and are suitable for chiselling tiles, plaster and light concrete. Only consider SDS Max if you regularly drill large diameter holes (over 30mm) or carry out heavy demolition work, as these machines are significantly heavier and more demanding to use.

Corded vs Cordless: Mains-powered SDS drills provide consistent power for intensive, all-day use without battery changes. However, modern 18V cordless models from quality manufacturers now deliver impressive performance with the convenience of cable-free operation. If you already use a particular battery platform (Bosch, DeWalt, Milwaukee, Makita), a bare unit can be a cost-effective addition to your kit. Consider a corded model if you primarily work from a van or fixed location with power readily available.

Impact Energy: Higher joule ratings mean faster drilling and more effective chiselling. For occasional DIY use, 1.5-2J is adequate. Professional tradespeople should look for 2.5-4J in an SDS Plus drill for reliable daily performance. Check the blows per minute (BPM) rating too - higher figures mean faster drilling progress.

Essential Features: Look for anti-vibration systems to protect your health during prolonged use - this is crucial for professionals. A safety clutch is vital for preventing dangerous kickback if the bit jams. Active vibration control and soft-grip handles significantly reduce fatigue. Consider models with depth stops for consistent hole depths, and rotating brush rings for drilling at any angle.

Brand and Budget: Professional-grade machines from Bosch, DeWalt and Milwaukee command premium prices but deliver superior performance, durability and after-sales support. Budget brands like Draper and Black & Decker suit lighter, occasional use. For tradespeople, investing in quality tools reduces downtime and provides better long-term value.

Popular Accessories

• SDS Plus Drill Bits - available in various diameters and lengths for different applications, from 5mm to 30mm typically
• SDS Chisels - pointed, flat and channelling chisels for breaking up concrete, removing tiles and chasing walls
• Chuck Adapters - convert your SDS drill to accept standard round-shank drill bits for versatility
• Depth Stops - ensure consistent hole depths, essential for fixing installations requiring precise measurements
• Dust Extraction Attachments - connect to vacuum systems to minimise harmful concrete dust at source
• Core Drill Bits - for cutting large diameter holes through masonry for ducting, soil pipes and ventilation
• Spare Carbon Brushes - essential maintenance parts for corded models (not required for brushless motors)
• Carry Cases - protect your investment during transport and storage on site or in the van

Safety Information

Personal Protective Equipment: Always wear approved safety goggles or a face shield when using SDS drills, as fragments can fly off at high speed. Hearing protection is essential - these machines generate noise levels exceeding 100dB. Dust masks or respirators rated FFP2 or FFP3 must be worn when drilling concrete or masonry, as silica dust poses serious long-term health risks including silicosis and lung disease.

Hand-Arm Vibration Syndrome (HAVS): Prolonged exposure to vibration can cause permanent damage to hands and arms. The HSE requires employers to assess vibration exposure and take action if daily limits are approached. Choose machines with low vibration figures and anti-vibration systems. Take regular breaks and don't grip the tool more tightly than necessary. Keep your hands warm and maintain good blood circulation.

Safe Operation: Always maintain a firm two-handed grip using the auxiliary handle. Check for hidden cables, pipes and rebar before drilling - use a cable detector on walls. Ensure the safety clutch is functioning correctly to prevent dangerous kickback if the bit jams. Never force the drill - let the tool do the work. Secure workpieces properly and ensure stable footing before starting work. Disconnect from power or remove batteries before changing bits or accessories.

Electrical Safety: For corded models, inspect cables regularly for damage and use a 110V transformer or RCD protection on construction sites. Ensure compliance with UK electrical regulations and BS EN standards. Keep the tool dry and never use in wet conditions unless specifically rated for such use.

Frequently Asked Questions

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

SDS Plus is the most common system, suitable for drilling holes up to 30mm diameter and light to medium chiselling work. The bits have a 10mm shank diameter. SDS Max is a heavy-duty system for holes over 30mm and serious demolition work, with 18mm shank bits delivering much greater impact energy. SDS Max drills are considerably heavier and more physically demanding to use, so only choose this type if your work genuinely requires it.

Can I use an SDS drill as a normal drill?

Many SDS drills accept a chuck adapter (often included or available separately) that allows you to fit standard round-shank drill bits. You can then switch to rotation-only mode for drilling wood, metal and plastic. However, for extensive work with standard bits, a conventional drill/driver is more suitable as it's lighter and easier to control for precision work.

How do I maintain my SDS drill?

Keep the chuck clean and lightly greased - apply special SDS chuck grease periodically to ensure bits slide in smoothly and lock securely. Blow out dust from ventilation slots after use to prevent motor damage. For corded models, carbon brushes will eventually need replacing (brushless motors don't require this). Store batteries charged to around 40-60% if not using for extended periods, and check them regularly for damage or swelling.

Why does my SDS drill have such high vibration?

Some vibration is normal due to the hammering action, but excessive vibration may indicate worn internal parts, a bent drill bit, or an unbalanced chuck. Always use quality, straight SDS bits in good condition. Modern drills with anti-vibration systems significantly reduce vibration transmission. If vibration seems abnormal, have the tool serviced as worn components can accelerate damage and increase health risks.

Are cordless SDS drills powerful enough for professional use?

Modern 18V cordless SDS Plus drills from leading manufacturers now deliver performance comparable to corded models for most applications. They're ideal for mobile work, drilling moderate numbers of holes, and locations without mains power. For intensive all-day drilling or the largest holes, corded models still offer advantages in sustained power. Many professionals now own both types, using cordless for convenience and corded for heavy-duty tasks.