Wall Chasers

About Wall Chasers

Wall chasers are specialised power tools designed to cut precise channels or grooves into masonry, brick, concrete, and other solid surfaces. These powerful machines simultaneously operate two parallel diamond-tipped blades, creating clean, uniform slots perfect for concealing electrical cables, plumbing pipes, or other services within walls. Unlike using an angle grinder or circular saw, wall chasers offer superior dust extraction capabilities and produce consistently accurate channels with minimal mess, making them essential equipment for professional installations that comply with UK building regulations.

Our comprehensive range includes both corded and cordless models from industry-leading manufacturers including DeWalt, Makita, Festool, Flex, and Einhell. Whether you need a compact cordless chaser for site work without mains power or a robust 230V model for high-volume commercial projects, you'll find machines with cutting depths ranging from 20mm to 40mm and disc sizes from 125mm to 150mm. Premium models feature brushless motors for extended runtime, adjustable depth settings for precise control, and integrated dust extraction systems that connect directly to vacuum extractors for virtually dust-free operation.

Modern wall chasers incorporate advanced safety features including blade guards, anti-kickback mechanisms, and soft-start technology. Many professional-grade models now offer compatibility with guide rail systems for perfectly straight cuts over extended distances, whilst cordless variants utilising 18V, 36V, or 54V battery platforms provide the flexibility required for refurbishment work and installations in properties without accessible power supplies.

Jargon Buster

• Diamond Blade: A circular cutting disc with industrial diamond segments bonded to the edge, specifically designed for cutting through masonry, concrete, and stone. Essential consumables that require periodic replacement depending on material hardness and cutting volume.
• Cutting Depth: The maximum depth a wall chaser can cut into a surface, typically adjustable between 10mm and 40mm. Adequate depth is crucial for accommodating cable conduit or pipework whilst maintaining sufficient wall integrity and meeting Part P electrical installation requirements.
• Brushless Motor: Advanced motor technology that eliminates carbon brushes, resulting in improved efficiency, longer runtime on battery-powered models, reduced maintenance requirements, and extended tool lifespan compared to traditional brushed motors.
• Dust Extraction Port: A connection point allowing attachment of a vacuum extractor (typically 35mm diameter) to capture dust at source. Essential for compliance with HSE regulations regarding respirable crystalline silica exposure on construction sites.
• Blade Spacing: The adjustable distance between the two parallel cutting discs, determining the width of the channel created. Common settings range from 10mm to 30mm to accommodate various cable sizes and conduit dimensions.
• No-Load Speed: The rotational speed (measured in RPM) at which the blades spin when not cutting material. Higher speeds generally provide cleaner cuts in harder materials, with professional models operating between 8,000-12,000 RPM.

Who Uses Wall Chasers?

Wall chasers are primarily used by:

• Electricians and Electrical Contractors: For creating channels to conceal cables during rewiring, new installations, and compliance with Part P Building Regulations requirements for buried cables in walls
• Plumbers and Heating Engineers: Cutting grooves for central heating pipes, radiator feeds, and underfloor heating systems in solid walls
• General Builders and Refurbishment Specialists: Installing services during renovation projects, extensions, and property conversions
• Data and Communications Installers: Running network cabling, TV aerial cables, and smart home wiring through masonry structures
• Kitchen and Bathroom Fitters: Creating service channels for appliances, extraction systems, and sanitaryware installations
• Maintenance Engineers: Retrofitting additional services in commercial and industrial properties
• Serious DIY Enthusiasts: Homeowners undertaking significant renovation projects requiring professional-quality chasing for electrical or plumbing work

How to Choose the Right Wall Chasers

Power Source: Corded models offer consistent power for demanding commercial work and extended use, whilst cordless variants (18V-54V) provide flexibility for site work, refurbishments, and locations without mains access. Consider whether you already own batteries from established platforms like DeWalt XR FlexVolt, Makita LXT, or Einhell Power X-Change to reduce initial investment.

Disc Size and Cutting Depth: Common disc diameters include 125mm, 140mm, and 150mm, with larger discs achieving greater maximum cutting depths (typically 30-40mm). Ensure your chosen model provides sufficient depth for your typical applications whilst accommodating UK standard conduit sizes and cable requirements under BS 7671 wiring regulations.

Motor Power and Performance: Corded models range from 1,200W to 2,400W, with higher wattage suited to intensive commercial use in hard materials like engineering brick or concrete. Brushless motors offer superior efficiency and longevity, particularly valuable in cordless models where runtime is paramount.

Dust Management: Quality dust extraction is essential for HSE compliance regarding workplace exposure limits for respirable crystalline silica. Look for models with effective shrouds and compatibility with Class L or M vacuum extractors. Some premium systems like Festool's offerings provide virtually dust-free operation.

Adjustability and Precision: Professional models feature tool-free depth adjustment, variable blade spacing, and compatibility with guide rail systems for extended straight cuts. These features significantly improve productivity and accuracy for high-volume work.

Build Quality and Durability: Budget models from manufacturers like Einhell suit occasional use, whilst professional-grade machines from DeWalt, Makita, Festool, and Flex withstand daily site work. Consider warranty coverage and availability of replacement parts when comparing options.

Popular Accessories

• Diamond Cutting Blades: Replacement discs specifically designed for wall chasers, available in different grades for various materials including brick, concrete, stone, and abrasive surfaces. Premium segmented blades offer longer lifespan and faster cutting speeds.
• Vacuum Extractors: Class L or M rated dust extractors with appropriate filtration for silica dust, essential for safe operation and HSE compliance. Many professional models feature automatic tool activation.
• Guide Rails and Clamps: Aluminium track systems ensuring perfectly straight cuts over extended distances, particularly valuable for long cable runs or multiple parallel chases.
• Depth Stop Systems: Additional components allowing precise, repeatable depth settings for consistent channel dimensions across large installations.
• Bolster Chisels and Club Hammers: For removing material between parallel cuts to create the finished channel, with SDS chisel attachments offering faster mechanical removal.
• Spare Carbon Brushes: Replacement wear components for brushed motor models, extending tool lifespan and maintaining optimal performance.

Safety Information

Personal Protective Equipment: Always wear approved safety glasses or face shields (meeting BS EN 166), respiratory protection (FFP3-rated masks minimum for silica dust), hearing protection, and heavy-duty work gloves. Steel toe-capped boots provide essential foot protection from falling debris.

Dust Control: Respirable crystalline silica (RCS) generated when cutting masonry poses serious long-term health risks. Always use appropriate dust extraction connected to a suitable vacuum extractor. HSE workplace exposure limits mandate strict control measures for construction dust exposure.

Electrical Safety: Check walls thoroughly for existing cables and pipes using a quality cable detector before cutting. Ensure tools are PAT tested regularly and corded models are used with RCD protection (30mA trip rating). Never bypass safety guards or operate tools with damaged cables.

Blade Safety: Inspect diamond blades before use for cracks, missing segments, or excessive wear. Ensure blades are correctly fitted and tightened according to manufacturer instructions. Never exceed the maximum rated speed marked on blades, and allow blades to reach full speed before contacting material.

Work Area Safety: Secure workpieces properly and maintain a clean, organised workspace. Be aware that wall chasers generate significant noise levels – warn others nearby and consider timing of work to minimise disturbance in occupied buildings.

Frequently Asked Questions

What's the difference between a wall chaser and an angle grinder?

Whilst angle grinders can cut channels using multiple passes, wall chasers use two parallel blades simultaneously to create uniform slots in a single pass. Wall chasers also incorporate superior dust extraction systems and purpose-built guards for safer, cleaner operation. They're specifically designed for chasing applications, offering better depth control, reduced vibration, and significantly improved productivity for electrical and plumbing installations.

Do I need a specific type of diamond blade for my wall chaser?

Yes, wall chaser blades differ from standard angle grinder discs. They're designed for the specific bore size and RPM rating of your model, typically 125mm or 150mm diameter. Choose blades appropriate for your material – softer segmented blades for brick and block, harder specifications for concrete and stone. Always verify compatibility with your specific machine model and never exceed the maximum rated speed.

How deep can wall chasers cut for electrical cables?

Most professional wall chasers offer adjustable cutting depths between 10mm and 40mm. For electrical installations complying with BS 7671 (18th Edition) requirements, cables buried in walls must be installed within prescribed safe zones and at appropriate depths. Typical chases for twin-and-earth cable require 20-25mm depth, whilst deeper cuts accommodate conduit or multiple cable runs. Always maintain sufficient wall integrity and follow Part P Building Regulations guidance.

Can cordless wall chasers match the performance of corded models?

Modern high-voltage cordless systems (36V-54V) with brushless motors now rival corded equivalents for most applications. Models like the DeWalt 54V XR FlexVolt deliver impressive power and runtime suitable for professional use. However, corded models remain preferable for continuous high-volume work where consistent power and unlimited runtime are priorities. Battery technology continues advancing rapidly, making cordless increasingly viable for demanding site applications.

Is dust extraction really necessary when using a wall chaser?

Absolutely essential, both for health compliance and practical reasons. Cutting masonry generates harmful respirable crystalline silica (RCS) dust that poses serious long-term respiratory health risks including silicosis and lung cancer. HSE regulations require effective dust control measures on construction sites. Beyond legal compliance, proper extraction dramatically improves visibility, reduces cleanup time, and creates safer, more professional working conditions. Always connect a suitable Class L or M vacuum extractor when operating wall chasers.