Description
Underpowered core drill rigs chatter across concrete slabs, snapping diamond segments and burning up motor armatures in cured concrete walls. The Husqvarna Construction DMS 400 Core drill with DS 500 stand bolts down solidly to core holes up to sixteen inches in diameter. A 3.2-kilowatt electric motor drives precision gearing under mechanical carriage feed. Running diamond core bits dry without water flow melts matrix segments.
Precision-machined steel mast columns mount onto a cast aluminum anchor base supported by four leveling jack screws. The carriage rides along ground steel gear racks using adjustable brass shims that eliminate carriage chatter. The heavy drill motor wet-end features dual-insulated copper windings and internal slip clutches that decouple drive torque during core bit jams. Stainless steel water manifolds inject cooling water directly through the center spindle.
Complete Core Rig Hardware Specs
Rigid steel mast assemblies eliminate drill bit chatter during deep structural slab penetrations. Precision rack-and-pinion feed handles permit smooth downforce control through tough concrete aggregate.
- 16-inch core bit capacity drills massive mechanical pipe penetrations through reinforced concrete
- 3200-watt 120-volt motor delivers sustained drilling torque through hard river rock aggregate
- Three-speed oil-bath gearbox selects 230, 480, or 980 RPM to match diamond core bit diameters
- DS 500 column stand prevents carriage deflection during deep foundation coring runs
- Four leveling jack screws stabilize the cast base plate across uneven concrete surfaces
- Integrated water swivel injects cooling water through the spindle center to flush concrete slurry
- Mechanical slip clutch protects internal gears from shock damage during rebar contact
Dynamometer Core Bench Telemetry
Bench testing quantifies electrical current draw and spindle torque across cured 5000 PSI reinforced concrete. The motor pulls 4.2 amperes unloaded, rising to 26.8 amperes while spinning a fourteen-inch diamond core bit through concrete and rebar. Spindle speed drops from 230 RPM down to 190 RPM under firm carriage downforce. Output torque stabilizes at 92 foot-pounds during continuous coring passes. Sound level meters read 88 dBA at operator ear level. Gearbox oil temperatures rise 34 degrees Fahrenheit after two deep wall cores.
Field Service Operational Traps
Loose anchor bolts allow the mast base to shift, binding the diamond core barrel and stripping drive gears. Drywall contractors cutting plaster board have no use for this heavy core rig. Never operate this machine without securing the base with an anchor bolt.
- Flush the internal water manifold with clean water after finishing concrete coring jobs.
- Wipe abrasive concrete slurry off the steel mast column gear racks after every shift.
- Check carriage brass guide shims for loose play and adjust set screws monthly.
Commercial Warranty Package Inventory
Husqvarna covers this core drill and stand with a 1-Year commercial warranty against defects. The package contains the DM400 drill motor, DS 500 mast column stand, anchor base plate, water connection hose, wrenches, and instruction manual.