Bosch 1-1/4 Inch SDS-plus Rotary Hammer with Quick-Change Chuck System

Description

Standard rotary hammers vibrate worker joints to exhaustion and slow down anchor placement when drill chucks require loose tools to change. The Bosch 1-1/4 Inch SDS-plus Rotary Hammer with Quick-Change Chuck System delivers 3.0 foot-pounds of impact energy to drill structural slabs without user fatigue. An 8.5-ampere motor generates 3600 blows per minute. Attempting to core four-inch holes in solid granite will trip mechanical clutches.

Die-cast magnesium gearcases house an air-cushioned striker mechanism running inside sealed grease chambers. The motor wet-end features dual-insulated copper field coils and high-grade carbon brushes that deliver continuous cutting torque under severe masonry friction. Vibration Control handles decouple mechanical hammer shock from technician palms. The quick-change chuck system swaps between SDS-plus and three-jaw keyed metal chucks without hand tools.

Quick-Change Hammer Hardware Specs

Air-cushioned striker mechanisms deliver 3.0 foot-pounds of impact energy directly to SDS-plus drill bits. Quick-change chuck couplings swap between SDS-plus and three-jaw metal chucks in seconds.

• 1.25-inch solid bit capacity cuts deep structural anchor holes in reinforced concrete
• 3.0 foot-pounds of impact energy pulverizes hard aggregate with minimal operator downforce
• 8.5-ampere 120-volt motor delivers 3600 blows per minute for rapid anchor hole production
• Vibration Control handle decouples mechanical hammer shock from technician palms
• Quick-change chuck system swaps between SDS-plus and three-jaw keyed metal chucks
• Three-mode selector switch chooses rotary hammer, rotation only, or hammer only chiseling
• Integrated depth gauge rod sets repeatable hole depths for drop-in anchor installations

Pneumatic Hammer Bench Telemetry

Bench testing monitors electric current and impact stroke cadence through cured 5000 PSI concrete. Free motor rotation draws 2.8 amperes at 120 volts, surging to 9.2 amperes while driving a 1-1/4-inch carbide bit. Spindle rotation drops from 760 RPM free speed down to 620 RPM under heavy downforce. Striker cadence hits 3600 BPM under active load. Sound level meters read 91 dBA at operator ear level. Gearbox casing temperatures climb 22 degrees Fahrenheit after twenty anchor holes.

Field Service Operational Traps

Dry concrete dust packs inside the SDS-plus chuck cavity if operators skip shank greasing. Woodworkers driving deck screws should use compact impact drivers instead. 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 power cord insulation jackets using solvent wipes to inspect for wire cuts.

Commercial Warranty Package Inventory

Bosch covers this rotary hammer with a 1-Year commercial warranty on tool components. The package includes the 1-1/4-inch SDS-plus rotary hammer, quick-change three-jaw chuck, auxiliary side handle, depth stop rod, and heavy carrying case.