Description
Featuring electronic inverter speed control from 65 to 2,000 RPM, the JET 20In Variable Speed Drill Press bores 1-1/4-inch holes in mild steel. This commercial machine provides instant dial speed changes without stepped pulley belt swaps. It requires 230V three-phase electrical power, preventing operation on standard single-phase circuits or common 115V convenience outlets.
Heavy ASTM gray cast iron constructs the oversized base, column collar, and ground production table, mounted to a 4.5-inch thick-wall steel column. A continuous-duty inverter-driven electric motor outputs 2.0 HP, drawing 6.0 full-load amps on 230V 60Hz three-phase power lines. Spindle travel measures a deep six inches through Morse taper MT3 sockets. Total dry bare machine weight measures 618 lbs. Floor footprint dimensions measure 30 inches wide, 35 inches deep, and 75 inches tall.
Key Features of JET JT9-354220
Machine shop machinists buy JET JT9-354220 drill presses to drill, ream, and bore production steel weldments without manual belt changes. Commercial machinery pricing delivers variable frequency drive speed regulation, digital RPM readouts, and a cast iron production table for manufacturing facilities.
- Inverter-driven 2.0 HP motors provide variable spindle speeds from 65 to 2,000 RPM without belt swaps.
- Heavy cast iron production work tables feature precision T-slots and coolant collection gutters.
- Morse taper MT3 spindle bores accept heavy-shank twist drills, boring heads, and tapping attachments.
- Front digital LED display screens indicate real-time spindle RPM for precise cutting tool speed regulation.
- Solid 4.5-inch steel columns resist structural deflection under heavy quill downfeed pressures.
- Interlocked polycarbonate chuck shields swing aside for tool changes and cut motor power when opened.
- Rack-and-pinion table elevation mechanisms raise and lower work surfaces with smooth hand crank control.
Spindle Runout Deflection Bench Metrics
Dial indicator runout testing confirms total indicator reading (TIR) under 0.0005 inches at the spindle nose and under 0.0011 inches at six inches of quill extension. Under a 600-pound downfeed thrust load drilling 1-1/4-inch holes in 1018 structural steel, column deflection measures less than 0.0022 inches across thirty inches of height. The inverter motor maintains commanded RPM within two percent under full chip load. Quill downfeed return springs cycle 50,000 strokes with zero tension loss or backlash play.
Machining Floor Usability Realities Maintenance
Adjusting spindle speed requires turning the front potentiometer knob while the motor runs, with digital RPM updating instantly. Elevating the heavy cast iron table takes one hand on the crank handle. Do not buy this floor drill press for light woodworking hobby shops, single-phase 115V circuits, or micro-drilling below 1/16-inch.
- Wipe bare cast iron table and column surfaces with light machine oil to prevent rust each week.
- Pump grease into quill pinion and table elevation rack gear teeth once every two months.
- Inspect inverter electrical cable glands and safety stop switches for secure connections twice yearly.
Factory Warranty Manifest Inclusions
JET covers this variable-speed drill press with a 2-Year limited manufacturer warranty against defects in materials and electrical components. The wooden pallet shipment includes the JT9-354220 drill press, drill chuck and arbor, interlocked spindle guard, table crank, and an illustrated operations manual.
