Cordless Grinders

About Cordless Grinders

Cordless grinders have transformed metalworking and surface preparation by delivering professional-grade performance without the restrictions of mains cables. MyToolShed.co.uk stocks a comprehensive range of battery-powered grinding tools from leading manufacturers including Bosch Professional, Makita, and DeWalt, enabling tradespeople to work efficiently on scaffolding, remote sites, or anywhere without access to 240v power. Modern brushless motor technology and high-capacity lithium-ion batteries ensure these cordless models now rival their corded counterparts for power output and runtime.

This category encompasses two main tool types: cordless angle grinders and cordless die grinders. Angle grinders handle heavy-duty cutting, grinding, and surface preparation with disc sizes from 76mm to 125mm, making them essential for welders, fabricators, and general construction trades. Die grinders offer precision work with their compact straight or angled bodies, ideal for detailed grinding, polishing, and deburring in confined spaces. MyToolShed features both types with advanced safety features including electronic kickback control, paddle switches, and tool-free disc changing systems.

Applications

Cordless grinders serve a wide range of trades and applications:

• Welders and Fabricators: Grinding welds flush, preparing joints, removing slag, and cutting metal components
• Steel Erectors and Metalworkers: Cutting structural steel, surface preparation, and installation adjustments
• General Builders and Contractors: Cutting metal fixings, removing fasteners, and site metalwork tasks
• Plumbers and Heating Engineers: Cutting pipework, removing corroded fittings, and preparing surfaces for welding
• Motor Vehicle Technicians: Removing rusted bolts, cutting exhaust systems, bodywork preparation, and precision deburring
• Stone Masons and Tile Fitters: Cutting and shaping materials with diamond discs
• Maintenance Engineers: Equipment repair, component modification, and workshop grinding tasks
• DIY Enthusiasts: Home renovation, metalwork projects, and automotive restoration

Choosing The Right Cordless Grinders

Disc Size and Tool Type: Select 115mm or 125mm angle grinders for heavy-duty cutting and fabrication. Compact 76mm models suit confined spaces, whilst die grinders excel at precision work and deburring where control matters most.

Battery Platform Compatibility: If you already own cordless tools from Makita, Bosch, or DeWalt, staying within the same 18V battery system allows you to share batteries and chargers across your collection, delivering substantial cost savings. MyToolShed.co.uk stocks bare units and complete kits to suit your requirements.

Motor Technology: Brushless motors are now standard in professional models, offering approximately 30% longer runtime, reduced maintenance, and increased power efficiency compared to brushed equivalents. Bosch's BITURBO technology and similar systems from Makita and DeWalt deliver performance matching 240v corded tools.

Safety Features: Professional-grade cordless grinders should include electronic kickback control, soft-start motors, and paddle switches for enhanced control. Tool-free guard adjustment and electronic motor protection against overload are valuable features for demanding trade applications.

Safety Information

Personal Protective Equipment: Always wear approved safety glasses or full face shield, hearing protection (grinders typically exceed 85dB), heavy-duty gloves, and steel toe-capped boots. For extended grinding sessions, use respiratory protection to prevent inhalation of metal particles.

Disc Selection: Only use discs rated for speeds equal to or exceeding your grinder's maximum RPM. Never use damaged or cracked discs, and ensure discs are appropriate for the material being worked. Allow new discs to run at full speed for 30 seconds before applying to workpiece.

Safe Operating Practices: Secure workpieces before starting, maintain firm two-handed grip, and never remove the guard. Allow tools to reach full speed before contact, and be aware that cordless models continue rotating briefly after trigger release. Keep working areas well-ventilated and be mindful of sparks near flammable materials.

Frequently Asked Questions

How long will a cordless grinder run on a single battery charge?

With a 5.0Ah battery on an 18V brushless grinder, expect approximately 20-40 cuts through 3mm steel bar or 30-45 minutes of continuous grinding under moderate load. Professional users typically keep multiple batteries on rotation to ensure minimal downtime throughout the working day.

Can I use my existing cordless tool batteries with a new grinder?

Yes, provided you stay within the same manufacturer's battery platform. Makita 18V batteries work across their entire cordless range, as do Bosch Professional and DeWalt systems. This compatibility represents significant cost savings, as you can purchase bare units from MyToolShed without batteries or chargers.

Are cordless grinders powerful enough for professional use?

Modern brushless cordless grinders from professional brands absolutely match 240v corded equivalents for most applications. Bosch's BITURBO technology, Makita's advanced systems, and DeWalt's professional range deliver comparable power output to mains-powered models, excelling in site work, working at height, and applications where cable management is problematic.