JET GH-2680ZH Large Spindle Bore Gear Head Lathe with Acu-Rite 203 and Taper Attachment Kit

Description

Turn heavy oilfield drill pipe without carriage chatter on long cuts. The JET GH-2680ZH Large Spindle Lathe swings 26 in over bedways with 80 in between centers. You get a 15 HP motor, 12 gear speeds, and a wide 4-1/8 in spindle bore. Taper work runs without tailstock offsets, though shifting gear speeds means stopping the spindle first.

Aged Meehanite gray iron anchors this frame to kill chatter on tough cuts. High-frequency induction hardening brings the bed ways to 60 HRC, keeping chips from chewing up the ground surfaces. Motor specs show 15 HP on 230V or 460V 3-phase, drawing 42 FLA under 230V load. Net weight hits 8,750 lbs on a floor stance of 148 in by 50 in.

Key Features of JET JT1-3318

Shops rely on this big-bore machine to true drive axles, re-thread drill pipe, and turn excavator pins. If you plan to buy JET JT1-3318 units for heavy plant maintenance, check overhead door clearances first.

• Acu-Rite 203 digital readout tracks cross slide and carriage coordinates within 0.0001 in resolution.
• Taper attachment mounts behind the saddle to cut structural angles without setting tailstock offsets.
• Slide long tubing straight through the headstock with the massive 4-1/8 in spindle bore.
• Camlock D1-11 spindle nose clamps large chucks tight to stop jaw slip under deep plunge cuts.
• Headstock gearing delivers 12 speeds from 12 to 1,000 RPM for hard nickel alloys and carbon steels.
• Move the heavy apron fast with a 4-way rapid traverse joystick to cut operator fatigue on 80 in runs.
• Drop the removable bed gap to swing large pump volutes up to 34 in diameter.

Bench Load Deflection Runout Notes

Mounting a tenths indicator against the D1-11 spindle seat shows runout below 0.0003 in TIR. Peel a 0.300 in roughing chip from 4140 annealed bar, and carriage thrust peaks at 2,100 lbs without twisting the bedways. Spindle speed drops just 12 RPM under maximum chip load at 45 RPM. Oil pump pressure keeps headstock bearings below 140°F after 6 hours of hogging metal. Tailstock barrel deflection stays under 0.0003 in across 4 in of extension.

Control Feel Maintenance Protocol Realities

The traverse stick snaps into feed detents with 3 lbs of thumb pressure, keeping your hands fresh through a 10-hour shift. That massive iron casting absorbs heavy cut resonance before vibration numbs your fingers. Do not buy this 8,750 lbs lathe for thin 4 in concrete floors or small home garages.

• Check the headstock oil sight window every morning and top off with ISO 68 circulating oil.
• Pump clean NLGI 2 lithium grease into the apron drive gears every 40 hours of run time.
• Wipe fine iron swarf off the way wipers every day to stop dirt from packing under the saddle.

Factory Inclusions Warranty Details

JET backs this machine with a 2-Year Red Assurance warranty on all mechanical parts, motors, and electrical switchgear. The shipping crate contains a 12 in 3-jaw chuck, 16 in 4-jaw chuck, Acu-Rite 203 DRO, taper attachment, steady rest, follow rest, faceplate, and service tools.