Choosing the right disc grinder comes down to disc size, power source and application. For most trade cutting and grinding — metalwork, tile removal, weld preparation — a 115mm or 125mm grinder covers the majority of applications. Larger 230mm grinders are for heavy-duty cutting of thick steel sections and masonry. Corded grinders deliver consistent power for extended use; cordless grinders offer freedom of movement on site. The JCB Pro 18V brushless grinder matches corded performance in most trade applications while running on the same battery platform as JCB drills, saws and impact wrenches. For cutting, use a cutting disc. For grinding and weld dressing, use a grinding disc. For paint removal and surface preparation, use a flap disc. Always fit the correct guard for the disc type and check the disc RPM rating matches your grinder.