Metabo HPT 1-3/4 Inch SDS Max Rotary Hammer with Aluminum Housing Body | DH45MEY

Description

Voltage drops across long jobsite extension cords cause standard induction motors to stall and burn switch contacts. The Metabo HPT 1-3/4 Inch SDS Max Rotary Hammer with Aluminum Housing Body maintains full impact cadence across generator power and long extension leads. An AC brushless motor produces 9.0 foot-pounds of impact energy. Pushing SDS-max bits into heavy solid steel beams will trigger electronic clutches.

Aluminum Housing Body construction bonds an internal die-cast aluminum frame within a double-insulated composite resin outer chassis. The AC brushless motor wet-end eliminates carbon brushes, commutators, and rotor coils, preventing motor burnout during voltage sags. An electro-pneumatic hammer striker runs inside sealed grease chambers supported by heavy cylindrical roller bearings. User Vibration Protection incorporates internal dynamic counterweights and shock-absorbing handles to cancel mechanical recoil.

SDS-Max Hammer Hardware Specs

Aluminum Housing Body architecture combines internal metal frame durability with external composite insulation. AC brushless motors maintain consistent drilling speeds despite voltage drops across long extension cords.

• 1.75-inch solid bit capacity cuts heavy structural anchor holes in cured industrial concrete
• 9.0 foot-pounds of impact energy delivers immense demolition power through tough aggregate
• AC brushless motor platform eliminates carbon brush maintenance and runs on generator power
• Aluminum Housing Body construction provides rigid internal bearing alignment under severe loads
• User Vibration Protection counterweights and spring handles isolate operators from recoil
• Push-button rotation speed selector switches between four preset impact and drilling speeds
• SDS-max drive chuck locks large core bits and demolition chisels securely without slip

Hammer Dyno Bench Load Telemetry

Bench testing monitors electric current and impact stroke cadence through cured 5000 PSI concrete. Free motor rotation draws 3.2 amperes at 120 volts, climbing to 12.8 amperes while driving a 1-3/4-inch carbide bit. Impact frequency hits 2850 BPM under active load with striking energy measuring 9.0 foot-pounds. Output spindle speed drops from 400 RPM down to 345 RPM under heavy downforce. Decibel sound level meters read 94 dBA at operator ear level. Housing temperatures climb 24 degrees Fahrenheit after ten holes.

Field Service Operational Traps

Neglecting bit shank grease causes high-friction galling that seizes expensive SDS-max bits inside the chuck. Finish carpenters hanging drywall trim have no need for this heavy concrete hammer. Never hammer drill into reinforced slabs without checking side handle clamp tightness.

• 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

Metabo HPT covers this rotary hammer with a 1-Year professional warranty against defects in materials and workmanship. The kit carton contains the 1-3/4-inch SDS-max rotary hammer, auxiliary side handle, depth stop rod, bit grease, and heavy carrying case.