Description
Lifting heavy 40-pound road breakers to chip vertical wall faces burns out your shoulders in minutes. The Bosch Jack Breaker Hammer takes down masonry walls and tears up tile mortar beds with rapid linear strikes. You run this 11-amp motor on household 120-volt outlets to generate 5.6 ft-lbs of impact energy. Pushing down off-axis on the chisel jams the floating bit holder and drops breaking speed by half.
You strip the barrel down to an alloy steel power cylinder housing an air-cushioned piston striker. Two induction-hardened steel pawls lock your SDS-Max bits into the chuck against continuous axial pounding. Dual seals around the armature shaft stop abrasive masonry dust before it cuts into copper motor windings. A rotating collar locks your flat chisels into twelve separate positions to match changing wall angles. Run this tool in winter without fresh grease, and the striker sticks in the rear of the bore.
Concrete Chipping Mechanical Hardware Array
You need hard linear chisel strikes without rotational torque when busting concrete footings down to the rebar. The internal gearset turns electric motor watts into rapid kinetic blows through a spring-cushioned striker.
- 11-amp electric motor delivers reliable kinetic impact power under continuous concrete demolition loads
- SDS-Max chuck holds demolition points and wide scaling chisels against continuous axial vibration
- Constant speed circuits keep your piston cycle rate steady under heavy downward chisel pressure
- Brush service light warns you eight hours before the motor brushes wear down to the copper lead
- Variable speed dial adjusts strike frequency to keep fragile masonry from blowing out at the edges
- Twelve-position collar locks flat chisels at the right angle for vertical wall and floor passes
- Padded side handle clamps anywhere along the barrel to give you solid two-handed control
Kinetic Piston Telemetry Load Analysis
Your current meter pulls 11 amps continuous from standard 120-volt lines under heavy chisel loading in cured foundation footings. The air-cushioned piston cycles at 2,650 blows per minute. Strike force measures 5.6 ft-lbs per blow into structural concrete. Piston friction heats the aluminum front gear barrel to 140°F during long chipping runs. The SDS-Max tool holder handles 65 ft-lbs of side pry leverage. Noise meters register 95 dBA at your ear.
Masonry Demolition Field Care Directives
You must grease your chisel shanks before each shift to prevent keyway galling inside the chuck. Do not buy this machine if you run core bits for electrical conduit because this hammer has no rotary drilling mode. Prying thick foundation stone with the chisel shank while running the motor snaps your tool steel flush with the nose.
- Coat the shank of every SDS-Max chisel with high-temperature hammer grease before chuck insertion
- Blow concrete dust out of the rear motor ventilation slots using dry compressed air weekly
- Inspect the SDS-Max chuck retainer sleeve for play to catch worn locking pawls before bits fall out
Commercial Warranty Terms Kit Inventory
Bosch backs this demolition hammer with a 1-Year limited warranty covering defective parts and factory assembly. Your carton holds the 11335K demolition hammer, an auxiliary side handle, an SDS-Max bull point chisel, a carrying case, and the instruction manual.