Description
Drilling two-inch core holes through cured foundation slabs binds light hammer drills and burns out armature windings. The Milwaukee 2 in. SDS Max Rotary Hammer powers large coring bits through structural aggregate with 19.9 ft-lbs of impact energy. Driven by a 15-amp motor, this heavy-duty hammer runs big core drills and demolition steels. Feed dry core bits into rebar without blowing out your dust flutes, and you cook the internal mechanical slip clutch.
You open the crankcase to a forged steel connecting rod driving an electro-pneumatic striker piston. Two hardened steel pawls inside the SDS-Max nose retain your chisel shanks against continuous linear hammering. Labyrinth air paths and sealed bearings prevent fine masonry dust from chewing through your motor field windings. A heavy steel counterweight moves opposite the piston to soak up linear kickback inside the gear housing. Run this tool in winter without fresh grease, and the striker sticks in the rear of the bore.
Heavy Structural Hammer Engineering Array
You need heavy rotational torque combined with hard linear strikes to punch large pipe holes through foundation walls. The mechanical layout pairs brushless AC motor efficiency with active anti-rotation safety clutches.
- 15-amp motor produces heavy rotational torque and hard linear blows to drill large foundation holes
- SDS-Max chuck assembly locks heavy core bits and breaker chisels under brutal rotary drive
- Active vibration springs decouple the primary handle from internal piston strikes to save your joints
- Two-mode selector dial shifts between rotary percussion drilling and hammer-only concrete chipping
- Constant speed electronics hold rotation steady when your bit hits dense gravel aggregate
- Mechanical slip clutch disengages the drive train if your bit binds against hidden foundation rebar
- Padded auxiliary side handle rotates 360 degrees to give you balanced two-handed drilling control
High Energy Kinetic Telemetry Analysis
Your power panel shows a steady 15-amp draw under full downward chisel load in 6-inch reinforced road slab. The mechanical piston cycles from 975 to 1,950 blows per minute while turning the bit up to 250 RPM. Strike energy registers 19.9 ft-lbs per impact. Piston friction heats the aluminum front gear barrel to 144°F during long chipping runs. The SDS-Max tool holder handles 95 ft-lbs of side pry leverage. Noise meters register 97 dBA at your ear.
Structural Concrete Care Application Limits
You must maintain steady two-handed control over this tool because high rotational torque will jerk your arms off-center. Do not buy this large hammer to set small plastic screw anchors because the strike energy shatters thin brick. Prying foundation chunks with your core bit shank will snap the carbide head off inside the hole.
- Coat every SDS-Max tool shank with high-pressure grease before you slide it into the nose collar
- Blow stone dust out from the motor intake vents with dry compressed air after each work shift
- Check the bit retainer collar for internal axial slop to catch worn drive keys before they slip
Commercial Warranty Terms Pack Roster
Milwaukee covers this heavy rotary hammer with a 5-Year limited warranty against defects in materials and manufacturing. The complete kit contains the 5342-21 rotary hammer, an auxiliary side handle, a carrying case, and the official user instruction manual.
