GH-1440ZX Large Spindle Bore Lathe - JET

Specifications

The JET GH-1440ZX Large Spindle Bore Lathe, model number 321910, is engineered for demanding metalworking tasks. It features a robust 7-1/2 HP, 230/460V, 3-phase motor, prewired for 230V, driving a geared head for consistent performance. This lathe offers a 14-inch swing over the bed and a 7-5/8 inch swing over the cross slide, with a generous 23-5/8 inch swing through the gap for larger diameter workpieces. The distance between centers measures 40 inches.

A key specification is its large 3-1/8 inch spindle bore, paired with a D1-8 spindle mount and an MT-7 spindle taper (MT-5 with sleeve). The machine provides 12 spindle speeds, ranging from 42 to 1,800 RPM, to accommodate various materials and operations. Operators can utilize 122 longitudinal and cross feed rates, with longitudinal feeds from .0015 to .0913 IPR and cross feeds from .0006 to .0365 IPR. Threading capabilities include 61 inch threads (1-5/8 to 72 TPI) and 24 metric threads (0.05 to 20mm) without requiring change gears. The lathe has a substantial weight of 5,187 lbs and overall dimensions of 96.00 x 44.00 x 66.00 inches (L x W x H). Its carriage offers 36-9/16 inches of travel, with a 9-inch cross slide travel and 5-1/8 inch compound slide travel.

Key Features

The GH-1440ZX is built with a one-piece cast iron base designed to absorb vibrations, enabling heavier cuts and maintaining accuracy. Its chrome molybdenum headstock gears are hardened, ground, and shaved for enhanced durability and performance. A universal gearbox simplifies operation by allowing the production of inch, metric, diametral, and module pitch threads without the need for manual gear changes. The carriage is equipped with one-shot lubrication and Turcite-B on the bed sliding surfaces, ensuring smooth movement and reduced wear. High-quality ANSI Class 50 wear-resistant cast iron bed ways are hardened and ground for long-lasting precision.

Additional features include a removable gap that facilitates machining of larger diameter workpieces, and a T-slotted compound slide with a four-way tool post for versatile tooling setups. A five-position automatic carriage stop increases operational efficiency. For operator convenience and safety, the lathe incorporates a fully integrated coolant system with a full-length splash guard and coolant return, an articulating halogen/LED work lamp, and centrally located controls with a jog button. A large, easy-to-use foot brake and a patented electronic chuck key holder further enhance safety. Standard accessories include a 10-inch 3-jaw scroll chuck with top reversing jaws, a 12-inch 4-jaw independent chuck, a 12-inch face plate, a follow rest, a large capacity steady rest, a toolbox, and adjusting tools. The machine also utilizes Meehanite Castings in its construction.

Applications

The JET GH-1440ZX Large Spindle Bore Lathe is a suitable solution for professional metalworking shops and industrial environments requiring robust and precise turning capabilities. It excels in demanding machining tasks, particularly those involving larger capacity workpieces that benefit from its substantial spindle bore and swing-through-gap features. This heavy-duty engine lathe is well-suited for a variety of metal turning operations, including precise feeding and threading applications. Its design supports general fabrication, custom part creation, and maintenance work where versatility and durability are critical.

Benefits

This lathe provides increased productivity through its powerful 7-1/2 HP motor and efficient operational features, allowing for faster material removal and reduced cycle times. Users benefit from improved accuracy and precision in machining, leading to higher quality finished products and minimizing rework. The large 3-1/8 inch spindle bore and removable gap enhance versatility, enabling the machine to handle a wider range of workpiece sizes and metalworking tasks.

Its robust construction, featuring a one-piece cast iron base and hardened, ground components, ensures exceptional durability and longevity, even under heavy loads. The design effectively reduces vibration during operation, contributing to consistent accuracy and allowing for heavier cuts without compromising finish quality. The universal gearbox simplifies operation by eliminating the need for manual gear changes when setting up for various thread pitches. Furthermore, integrated safety features, such as the electronic chuck key holder and E-Stop, enhance operator protection. The inclusion of essential accessories provides a complete package, allowing for immediate use upon installation.