Matthew has been working with tools his entire life. Rebuilding his first engine at 15, he's spent years in the diesel mechanic industry, repaired complex conveyor systems, and mastered hands-on troubleshooting.
Having served as the sole Telebelt mechanic in the Midwest for three years, Matthew possesses deep, practical knowledge of heavy equipment and machinery.
If you’re unsure about what you need, he can walk you through the entire process — from choosing the right tool to securing the best price.
*Please Note: This timeline is an estimate. Certain products may require an additional 1 week for manufacturing. Please speak with your sales rep, Matthew, for official details and confirmation before placing your order.
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The JET 16" x 40" Geared Head Engine Lathe (JT9-321148) is a massive, heavy-duty turning center engineered for uncompromising industrial fabrication. Operating on a robust 230V 3-Phase power grid, the fully enclosed geared headstock delivers 12 slip-free spindle speeds ranging from 25 to 1,800 RPM. This machine's defining feature is its oversized 3-1/8" spindle bore, allowing commercial shops to process large-diameter bar stock and piping directly through the headstock. With a 16-inch swing over the bed and a massive 25-1/2" capacity through the removable gap, this lathe provides the structural rigidity and workpiece flexibility required to dominate continuous-duty production environments.
JET 16x40 Lathe Applications
Heavy industrial machining, large-diameter shaft turning, and precision bored finishing.
Continuous-duty fabrication and rapid material removal in 3-Phase commercial machine shops.
Complex multi-pass threading workflows supporting up to 61 distinct Threads Per Inch (TPI).
Machining extreme-diameter flanges, flywheels, and wide faceplate work utilizing the 25-1/2" removable gap section.
Engineered specifically for heavy manufacturing environments that require massive structural dampening, high-torque 3-Phase power, and large-capacity spindle bores.
Technical Specifications
Stock Number
JT9-321148
Machine Type
Geared Head Toolroom Lathe
Electrical Configuration
230V, Three-Phase (3Ph)
Swing Capacities
16" Over Bed • 10" Over Cross Slide • 25-1/2" Through Gap
Distance Between Centers
40"
Spindle Bore / Taper
3-1/8" Bore / 7MT Spindle Taper (5MT with Sleeve)
Speed Range
12 Speeds: 25 – 1,800 RPM (Geared Head)
Maximum Threading
61 TPI
Travels
Cross Slide: 9" • Tailstock Spindle: 5"
Gap Length
12.25"
Overall Dimensions (L x D x H)
97.5" x 40" x 48"
Performance & Engineering Controls
Oversized 3-1/8" Spindle Bore: Maximizes machining versatility and throughput by allowing large-diameter industrial piping and heavy bar stock to pass completely through the headstock.
Enclosed Geared Headstock: Provides immediate, positive power transfer across 12 distinct speed settings, ensuring optimal high-torque surface footage from 25 to 1,800 RPM.
Expansive Removable Gap: Extends the swing capacity to an impressive 25.5 inches, allowing for the machining of extreme-diameter components while preserving the baseline rigidity of the machine bed.
Heavy-Duty Travels: Equipped with a robust 9 inches of cross slide movement and 5 inches of tailstock travel to easily clear specialized cutting tooling setups and large workpieces.
Precision Feed Rates: Features aggressive longitudinal feed rates ranging from 0.0015 to 0.0913 IPR for highly consistent and rapid material removal.
Why Invest in This JET Lathe
Delivers the perfect balance of a practical 40-inch center distance with the massive spindle bore capacity typically only found on much larger, more expensive machines.
Operates on robust 230V 3-Phase power, bringing relentless industrial capabilities to continuous-duty production lines.
Built with rigid, vibration-dampening cast iron components designed to maintain strict commercial tolerances through years of heavy roughing cuts.
Backed by the industry-leading JET Red Assurance Warranty for complete professional peace of mind on the shop floor.
The JET 16x40 establishes a heavy-duty, high-torque foundation for your commercial machining operations, delivering unyielding precision and massive large-bore flexibility.
Key Information
Order Cutoff Time: 2:00 PM EST
Order Handling Time: 1–3 business days (Monday–Friday)
Transit Time: 1–7 business days (Monday–Friday)
Total Estimated Delivery Time: 3–11 business days (Monday–Friday)
Shipping Availability: Free Shipping On Most Items In The Contiguous United States only