Description
Weak cordless drills strip internal reduction gears and overheat armatures when driving massive structural screws into dense timber. The Fein 18V ASCM 18-4 QMP AS High Torque QuickIN hammer drill delivers extreme rotary power through four mechanical gear stages. An 18-volt brushless motor produces 1150 inch-pounds of torque. Forcing half-inch twist drills into unlubricated structural steel will trip electronic clutches.
Solid metal gearboxes house a four-speed mechanical gear train machined from surface-hardened chrome-molybdenum alloy steel. The brushless motor wet-end incorporates pure copper stator coils and neodymium rotor magnets that shed thermal build under continuous high-torque driving. The QuickIN tool interface mounts on a case-hardened spindle shaft supported by twin sealed deep-groove ball bearings. Electronic torque control decouples motor power across precision increments to prevent screw shank fracture.
Hammer Drill Hardware Performance Matrix
Four-speed mechanical transmissions optimize output torque across small metal drill bits and massive timber fasteners. QuickIN accessory chucks swap between keyless drill chucks, tapping chucks, and socket adapters without tools.
- 1150 inch-pounds of torque sinks long structural timber screws and large hole saws effortlessly
- Four-speed solid metal gearbox selects 400, 700, 1400, or 2500 RPM for precise application matching
- QuickIN accessory interface swaps chucks, tapping heads, and socket adapters in seconds
- Brushless 18-volt motor platform provides high rotational torque with low battery power drain
- Selectable hammer mechanism pounds through brick, block, and cured concrete footings
- Electronic torque clutch disengages drive power to protect small fasteners from stripping
- Die-cast aluminum gear housing sheds internal gear heat during continuous production runs
Rotational Bench Dyno Telemetry
Bench testing monitors battery current draw and spindle torque across heavy carbon steel plate. Unloaded motor rotation draws 1.8 amperes from the 18-volt battery, surging to 28.6 amperes while driving a half-inch twist drill through structural steel. Low gear spindle torque peaks at 96 foot-pounds before limiter engagement. Spindle speed drops from 400 RPM free speed down to 335 RPM under heavy feed downforce. Decibel meters record 84 dBA under load. Gearcase exterior temperatures climb 20 degrees Fahrenheit after fifteen deep holes.
Field Service Operational Traps
Drilling unlubricated structural steel burns drill bit cutting margins and overheats gearcases. Finish carpenters driving drywall screws have no need for this heavy four-speed metal drill. Never operate this high-torque drill in first gear without installing the auxiliary side handle.
- Apply sulfur-based cutting oil to metal drill bits during heavy plate penetration runs.
- Wipe metal shavings and cutting oil off chuck jaws after every production shift.
- Clean battery terminal contact tracks using dry nylon bristle brushes every week.
Commercial Warranty Package Inventory
Fein protects this hammer drill kit with a 3-Year commercial warranty upon online registration. The kit includes the 4-speed cordless hammer drill, QuickIN solid metal chuck, two 18-volt 4.0Ah batteries, rapid charger, side handle, and heavy plastic carrying case.