Description
Dragging electric cords across remote highway barriers creates dangerous trip points and snag hazards. The Makita 40V max X2 (80V) XGT 28 lb AVT Demolition Hammer Kit breaks foundation footings and road curbs using two 40V batteries in series. Delivering 80V cordless power, this heavy breaker yields 20.9 ft-lbs of impact energy. Stalling the chisel inside deep concrete without clearing dust causes thermal overload shut-downs.
A dual-battery brushless motor turns a precision-cut steel crankshaft to drive an air-cushioned striker piston. The SDS-Max tool chuck features hardened alloy steel locking pawls ground to resist severe axial hammering wear. Anti-Vibration Technology incorporates an active internal counterbalance weight to neutralize heavy impact recoil forces. Dual sealed armature bearings keep conductive silica dust out of internal motor windings. Fine concrete dust entering battery terminal bays causes poor terminal contact and intermittent electrical shut-downs under heavy vibration.
Cordless Demolition Engineering Hardware Array
Heavy highway repair requires cord-free breaking power comparable to medium electric pavement breakers. The 80V cordless mechanical train pairs brushless motor efficiency with active mechanical vibration damping.
- Dual 40-volt battery system combines power to deliver 80-volt heavy-duty concrete breaking capability
- SDS-Max chuck system secures heavy demolition chisels while allowing rapid one-handed bit changes
- Active Vibration Technology uses an internal counterweight to cut vibration transfer to operator joints
- Constant speed control stabilizes impact frequency under varying concrete aggregate hardness levels
- Wireless Auto-Start System pairs via Bluetooth to activate paired jobsite dust extractors automatically
- Variable speed dial regulates impact frequency from 950 to 1,900 blows per minute for precise chipping
- Twin LED task lights illuminate dark jobsite breaking points inside foundation trenches
Battery Driven Kinetic Telemetry Analysis
Current draw pulls up to 48 amps across the 80V battery circuit during continuous breaking in highway concrete. The mechanical piston cycles from 950 to 1,900 blows per minute. Kinetic strike energy outputs 20.9 ft-lbs per stroke into cured foundation slabs. Internal compressive air friction elevates the cast aluminum barrel to 142°F during continuous work passes. The SDS-Max drive spline absorbs up to 75 ft-lbs of off-axis chisel pry force. Sound pressure registers 96 dBA.
Cordless Demolition Fleet Care Boundaries
High-voltage battery breakers demand strict battery cooling cycles to avoid thermal shut-down. Drywall contractors hanging light metal studs should not purchase this 28-lb breaker because its aggressive impact destroys light structural frames. Prying thick foundation walls with the chisel shank while running the motor snaps expensive tool steel inside the chuck.
- Apply high-temperature hammer grease to every chisel shank before sliding it into the SDS-Max holder
- Blow fine silica dust out from the battery connection terminals using clean compressed air daily
- Allow hot battery packs to cool down before locking them onto high-speed multi-bay battery chargers
Commercial Warranty Terms Pack Roster
Makita supports this 80V XGT breaker kit with a 3-Year limited warranty covering the brushless motor and mechanical gearbox. The package contains the GMH02 breaker, two 40V max 4.0Ah batteries, a dual-port rapid charger, a bull point chisel, a side handle, and a transport case.
