Description
Underpowered SDS-plus hammers smoke and stall when drilling massive two-inch holes through bridge abutments and foundation footers. The Bosch 18V SDS-Max 1-7/8 Inch rotary hammer kit delivers 9.3 foot-pounds of impact energy to crush heavy structural concrete. A brushless motor generates 2900 blows per minute for deep foundation drilling. Running SDS-max bits into heavy solid steel beams will trigger electronic clutches.
High-strength magnesium alloy gear housings enclose a massive electro-pneumatic striker mechanism running inside synthetic fluid grease. The brushless motor wet-end incorporates heavy copper windings and high-grade neodymium magnets capable of handling sustained 40-ampere current draws. KickBack Control sensors decouple the drive within milliseconds if the bit catches on rebar. An SDS-max drive chuck features heat-treated alloy steel locking wedges that handle immense rotational torque.
SDS-Max Rotary Hammer Specs
Massive electro-pneumatic hammer pistons deliver 9.3 foot-pounds of impact energy for heavy foundation coring. Electronic KickBack Control decouples the drive instantly when bits strike rebar.
- 1.875-inch solid bit capacity cuts large mechanical pipe penetrations through concrete walls
- 9.3 foot-pounds of impact energy shatters hard river rock aggregate with zero hesitation
- Brushless 18-volt motor platform delivers corded-equivalent demolition and drilling power
- KickBack Control technology shuts down motor power instantly during sudden bit bind-up
- Vibration Control handle suspension reduces reciprocating shock on technician joints
- SDS-max drive chuck locks large core bits and demolition chisels securely without slip
- Variable speed trigger permits smooth hole spotting before full hammer engagement
Dyno Bench Load Telemetry
Bench testing monitors battery power consumption and impact energy through 6000 PSI cured concrete. Unloaded motor rotation draws 3.4 amperes from the 18-volt battery, surging to 38.2 amperes while driving a 1-1/2-inch bit. Battery terminal voltage drops from 18.2 volts to 15.4 volts under continuous load. Impact frequency stabilizes at 2900 BPM under heavy forward thrust. Decibel sound level meters read 96 dBA at operator ear level. Gearbox casing temperatures climb 34 degrees Fahrenheit after ten deep holes.
Field Service Operational Traps
Neglecting bit shank grease causes high-friction galling that seizes expensive SDS-max bits inside the chuck. Electricians drilling small tapcon screw holes have no use for this twenty-pound hammer. Never operate this tool without securing the auxiliary D-handle firmly.
- Coat SDS-max bit shanks with high-temperature chisel paste before every insertion.
- Wipe abrasive concrete grit off the front chuck rubber seal sleeve after every shift.
- Clean battery terminal connections using dry nylon bristle brushes every week.
Commercial Warranty Package Inventory
Bosch covers this SDS-max rotary hammer kit with a 1-Year commercial warranty against defects. The complete kit includes the 1-7/8-inch SDS-max rotary hammer, two 18-volt 12.0Ah batteries, fast charger, auxiliary side handle, and heavy wheeled transport case.