Description
Demolition contractors battle frozen pneumatic tow-behind compressors and heavy moisture in bull-hose lines when breaking reinforced concrete floors. The Makita 80V max XGT Brushless 70-pound breaker and power cutter kit delivers high-voltage commercial demolition without diesel air compressors. Chisels strike hard. However, hauling the 70-pound breaker up multi-tier scaffolding strains crew back muscles.
Teardowns show a massive heat-treated alloy steel barrel housing a mechanical air-cushion striking piston supported by an active vibration absorption counterweight. The 14-inch power cutter utilizes a high-efficiency belt-drive transmission paired with dual brushless stators. In contrast to 90-pound pneumatic paving breakers whose ductile iron cylinders rust from unseparated moisture, these 80-volt brushless motors use labyrinth seals and sensorless commutation to lock out concrete slurry and crystalline silica.
Heavy Demolition Fleet Hardware Specs
This ultra-heavy demolition package combines commercial concrete breaking with wet diamond disc saw cutting. The 80-volt cordless architecture eliminates tow-behind diesel compressors and bulky pneumatic bull hoses.
- 53.0 foot-pounds impact energy fractures dense reinforced concrete bridge decks.
- 1-1/8-inch hex tool retainer accepts standard pavement breaker moil points and chisels.
- Active Vibration Technology counterweight reduces vibration to 6.5 meters per second squared.
- 14-inch power cutter delivers 3800 RPM with a 5-inch maximum cutting depth.
- Integrated water delivery connection regulates water flow to suppress airborne crystalline silica dust.
- Electric brake stops rotating diamond saw blades in under four seconds upon trigger release.
- Four 40V max XGT 8.0Ah battery packs maintain sustained electrical current for continuous breaking.
Air Baseline Dyno Comparison Telemetry
Dynamometer testing evaluates this 80-volt demolition package against industrial 90-pound pneumatic paving breakers consuming 65 CFM at 90 PSI dynamic. The breaker hammer delivers 950 blows per minute under heavy concrete load, eliminating the twenty-PSI dynamic line drop of 100-foot 3/4-inch pneumatic bull hoses. The unit avoids the 35-degree Fahrenheit adiabatic exhaust drop that freezes pneumatic breaker throttles solid. Peak power cutter motor output hits 4.8 horsepower, producing an acoustic sound pressure rating of 98 dBA at operator ear level.
Field Service Directives Operational Boundaries
This 80-volt demolition kit destroys reinforced slabs without compressors but carries extreme physical mass. Interior drywall contractors should avoid this package because the 70-pound chassis mass ruins light subfloors and damages underlying joists. Dry cutting cured concrete without water suppresses blade speed and ruins segmented diamond bonds.
- Apply high-temperature chisel paste to 1-1/8-inch hex bit shanks before each shift.
- Purge concrete slurry from breaker chuck retainer slides with clean water after use.
- Recharge 8.0Ah battery packs in shaded areas to prevent thermal over-temperature lockouts.
Commercial Warranty Box Package Inventory
Makita backs these XGT commercial tools, batteries, and chargers with a 3-Year limited warranty. The kit contains the GMH04 70-lb breaker hammer, GEC01 14-inch power cutter, four 40V max 8.0Ah batteries, dual-port rapid charger, bull point chisel, water supply coupler, and breaker cart.
