Intro
A full-size 125 mm angle grinder is the right tool for cutting rebar and grinding welds, but when the job is trimming a rusted bolt in a tight corner, slicing through a metal bracket inside a cabinet, or cutting a conduit in a ceiling void, that same grinder is physically too large. Makita's DMC300Z is an 18-volt compact grinder using 76 mm discs — small enough for one-handed use in confined spaces, yet powerful enough to cut metal, tile, and plastic efficiently. With 400 customer reviews averaging 4.6 out of 5 stars, this is one of the most proven tools in Makita's LXT compact range, and it shares batteries with the hundreds of other Makita 18V tools that professionals already own.
Generalities
The DMC300Z is an 18-volt cordless compact grinder in Makita's LXT platform, using 76 mm discs. It is designed for one-handed operation in confined spaces and is part of Makita's professional range. With 400 customer reviews averaging 4.6 out of 5 stars, this is a mature, well-proven tool with a large user base. Sold as a bare tool without battery or charger.
This review examines the compact format advantages, the cutting capabilities, and the professional and DIY applications where this tool's compact size makes it the right choice.
Description
The tool drives 76 mm discs with approximately 22 mm of cutting depth — enough for bolts up to M10, threaded rod, thin sheet metal, plastic and copper pipe, and ceramic tiles. The slim straight-line body design fits into spaces where the gear head of a standard angle grinder cannot physically go: between wall studs, inside cabinets, behind pipework, within engine bays.
The one-handed grip and balanced weight make it comfortable for the quick, awkward cuts that punctuate installation and repair work. The tool-free disc change system uses a spindle lock and hand-tightened nut — swap discs in seconds without a spanner. The protective guard is sized for the 76 mm discs and directs sparks and debris away from the hand.
Customer feedback from 400 reviews averaging 4.6 out of 5 stars is outstanding. The large review sample provides strong confidence in the tool's reliability, with consistent praise for its ability to reach confined spaces, the convenience of tool-free disc changes, and the overall build quality. As a bare tool, it requires existing Makita 18V LXT batteries and charger.
Pros and cons
Pros
- 400 reviews averaging 4.6 out of 5 stars is exceptional — a large, proven user base with consistent satisfaction
- Reaches confined spaces where a 125 mm grinder cannot physically fit — the primary reason to own this tool
- Part of Makita's 18V LXT system — shares batteries with hundreds of Makita professional tools
- Tool-free disc change with spindle lock — swap discs in seconds without tools
- One-handed operation and compact size — ideal for quick cuts in awkward positions
Cons
- 22 mm cutting depth limits applications — not a replacement for a full-size grinder for deep cuts
- Bare tool — battery and charger not included
- 76 mm discs are less widely stocked than 115 mm or 125 mm formats
Use cases
This compact 76 mm cordless grinder is designed for Makita LXT users — automotive technicians, electricians, plumbers, and fabricators — who need a one-handed cutting tool for metal, tile, and plastic in confined spaces.
Confined Space Cutting
The defining application: cutting bolts, brackets, pipe, and conduit in locations a full-size grinder cannot reach — inside cabinets, between joists, within engine bays.
Makita LXT System Expansion
For professionals with Makita 18V LXT batteries, this bare tool adds compact cutting capability at minimum cost.
Automotive and Installation Work
Cutting rusted fasteners, trimming metal brackets, sectioning conduit during electrical, plumbing, and automotive work.
Tile and Light Material Cutting
Trimming ceramic tiles, cutting plastic pipe and trunking, and sectioning thin metal sheet during renovation and installation projects.