Description
Weak cordless rotary hammers crawl through hard aggregate and overheat batteries during high-volume commercial anchor installations. The Metabo 18V 1 1/8in SDS Plus Combination Hammer bare tool powers carbide drill bits through cured concrete with 3.1 joules of impact energy. An 18-volt brushless motor generates 4500 blows per minute. Pushing solid bits beyond 1-1/8-inch diameter limits stalls the motor.
Die-cast aluminum gearcases house an air-cushioned striker mechanism supported by double-row ball bearings. Metabo VibraTech handles integrate counter-balanced dampening springs that decouple reciprocating shock from technician hands. The brushless motor wet-end incorporates neodymium permanent magnets and heavy copper stator windings that shed thermal build under continuous drilling friction. An S-automatic safety clutch decouples drive gears mechanically the instant drill bits bind inside structural rebar cages.
Combination Hammer Bare Tool Specs
Pneumatic striker mechanisms deliver 3.1 joules of impact energy directly to SDS-plus drill bits. Metabo VibraTech suspension handles isolate technician hands from mechanical recoil.
- 1.125-inch solid bit capacity cuts commercial structural anchor holes in reinforced slabs
- 3.1 joules of impact energy shatters high-strength concrete aggregate effortlessly
- Brushless 18-volt motor platform provides high impact cadence with low battery power drain
- Metabo VibraTech suspension handle absorbs reciprocating shock to protect worker joints
- S-automatic mechanical safety clutch disengages drive gears instantly during bit bind-up
- Three-mode selector switch chooses rotary hammer, rotation only, or hammer only chiseling
- SDS-plus tool chuck permits rapid bit changes with single-hand pull-back collars
Hammer Dyno Bench Readings
Bench power analyzers track electrical current draw and impact energy across high-strength cured concrete. Running unloaded, the 18-volt battery draws 2.2 amperes, climbing to 26.4 amperes while driving a one-inch carbide bit. Battery terminal voltage drops from 18.2 volts down to 15.8 volts under peak hammering resistance. Striker cadence hits 4500 BPM under active load. Sound level meters read 91 dBA at the operator position. Gearcase temperatures rise 24 degrees Fahrenheit after twenty holes.
Field Service Operational Traps
Dry concrete dust packs inside the SDS-plus chuck cavity if operators skip shank greasing. Finish carpenters hanging drywall trim have no need for this heavy concrete hammer. Never hammer drill into reinforced slabs without applying firm forward contact pressure.
- Grease bit shanks with high-temperature chisel paste before inserting into the chuck.
- Wipe concrete dust off the rubber chuck nose cone after every shift.
- Clean battery terminal contact tracks using dry nylon bristle brushes every week.
Commercial Warranty Package Inventory
Metabo backs this cordless combination hammer with a 3-Year commercial warranty on motor and tool electronics. The bare-tool package contains the 1-1/8-inch SDS-plus rotary hammer bare tool, auxiliary side handle, depth stop rod, and operator manual.