Description
Bore massive holes through heavy machinery frames, crane turntables, and commercial trailer tow plates with four-speed muscle. The CS Unitec 3-1/16 Inch Four-Speed magnetic drill delivers heavy industrial hole cutting capacity. This brute-force drill features a mechanical four-speed gearbox. It requires overhead hoist support to position its 53-lb steel frame safely on vertical workpieces.
Precision cast steel forms the upright column and slide housing, preventing quill twist under high manual feed downforce. A mechanical four-speed oilbath gearbox provides four distinct speed ranges, matching spindle torque across cutters from 1/2-inch to 3-1/16 inches. A Morse Taper 3 spindle interface accepts annular cutter arbors, twist drills, and bridge reamers. The heavy electromagnetic base produces 4700 lbs of holding force.
Key Features of CS Unitec MABASIC-850
Heavy fleet rebuilders use this four-speed magnetic drill to bore pivot pin holes on large commercial loaders. The mechanical four-speed gearbox maintains torque across massive cutter diameters.
- 3-1/16 inch annular cutter capacity bores large-diameter holes through heavy machinery steel
- Mechanical four-speed oilbath gearbox delivers 110, 175, 245, and 385 RPM spindle ranges
- Morse Taper 3 spindle mounting accepts industrial cutter arbors and large twist drill shanks
- 4700 lb magnetic base holding power anchors the drill against heavy carbon steel structures
- 16-amp high-torque electric motor delivers continuous power through heavy metal chip loads
- Direct through-spindle internal lubrication feeds cutting oil straight to annular cutter teeth
- Internal motor cabling eliminates snag hazards around sharp steel burrs and chips
Four-Speed Gearbox Dyno Torque Telemetry
Spindle dynamometers record 46 foot-pounds of torque at 110 RPM under full 3-1/16 inch annular cutter load. Magnetic base tensile retention tests confirm 4750 lbs on 1-inch thick ASTM A36 plate. Electric motor current draw stabilizes at 15.2 amps during heavy boring through 1-inch structural plate. Spindle runout measures under 0.0012 inches across full travel. Acoustic sound output measures 79 dBA.
Heavy Drilling Directives Safety Boundaries
Wipe all chips and scale from the steel mounting zone before flipping the magnet switch. Rig a rated safety strap around the drill housing and equipment chassis before drilling on vertical surfaces. Never operate this large-capacity machine on steel plate under 3/8-inch thickness without carbon steel backing.
- Four-speed gearbox requires industrial gear oil level checks every sixty operating hours
- Morse Taper 3 spindle socket demands cleaning with a brass taper wiper to remove metal grit
- Slide carriage dovetail gibs require brass screw adjustments to eliminate lateral play
CS Unitec MABASIC Warranty Manifest
CS Unitec backs this heavy drill with a 1-Year industrial warranty against material and manufacturing defects. The transport case contains the MABASIC-850 drill, MT3 arbor, coolant reservoir, safety strap, drift key, and manual.