Description
Dry drilling in finished buildings creates hazardous dust clouds while wet drilling slurry ruins interior carpets and expensive wood floors. The CS Unitec 120V 3-Speed Wet/Dry Hand Held Core Drill kit switches between wet and dry coring modes without swapping motors. An 18-ampere motor drives three mechanical gear ranges. Forcing dry core bits into cured structural concrete without vacuum extraction will glaze diamond segments.
Die-cast aluminum gear housings protect a three-speed oil-bath gearbox supported by heavy cylindrical roller bearings. The motor wet-end features dual-insulated copper field windings and electronic overload protection that cuts power before thermal breakdown damages armature resins. An integrated mechanical slip clutch decouples the drive train if rebar jams the diamond barrel. Dual-purpose spindles route cooling water for wet cuts or vacuum airflow for dry dust extraction.
Wet Dry Core Drill Specs
Dual-function spindles connect to pressurized water lines for wet coring or HEPA vacuums for dry drilling. Anchor and vacuum stands provide rigid column guidance across finished floors and raw slabs.
- 6-inch core bit capacity drills mechanical penetrations through concrete, brick, and block
- 18-ampere 120-volt motor delivers sustained drilling torque through hard masonry materials
- Three-speed oil-bath gearbox shifts between 510, 1150, and 2500 RPM for various bit sizes
- Dual-purpose spindle accommodates water cooling lines or high-flow dust extraction hoses
- Mechanical slip clutch protects internal gears from shock damage during rebar contact
- Anchor and vacuum stand secures to polished concrete floors without drilling anchor holes
- Electronic overload protection system cuts power before motor windings experience thermal damage
Dynamometer Core Bench Telemetry
Bench testing quantifies electrical current draw and spindle torque across cured structural concrete. The motor pulls 2.8 amperes unloaded, rising to 17.8 amperes while spinning a four-inch diamond bit through concrete and rebar. Spindle speed drops from 510 RPM down to 435 RPM under firm downforce. Output torque stabilizes at 36 foot-pounds during continuous coring passes. Sound level meters read 86 dBA at operator ear level. Gearbox oil temperatures rise 24 degrees Fahrenheit after two deep slab cores.
Field Service Operational Traps
Dry coring without a high-flow HEPA vacuum packs abrasive dust inside the cut groove, binding the core barrel. Plumbers installing residential copper pipe have no use for this commercial coring setup. Never switch between wet and dry modes without purging the spindle interior.
- Flush the internal water manifold with clean water after finishing wet coring jobs.
- Clean fine concrete dust out of the vacuum extraction port using compressed air after dry cuts.
- Check gearcase oil levels through the sight glass before starting weekly drilling shifts.
Commercial Warranty Package Inventory
CS Unitec protects this wet and dry core drill with a 1-Year commercial warranty against defects. The package contains the core drill motor, anchor and vacuum stand, vacuum seal kit, water connection, wrenches, and user manual.