JET GH-1640ZX Large Spindle Bore Lathe with ACU-RITE 203 DRO from JET delivers power, precision, efficiency, and reliability for demanding metal shop applications. Built around a one-piece cast iron base that absorbs vibrations during operation, this 16 x 40 geared-head lathe enables heavier cuts while maintaining accuracy. The Universal Gearbox eliminates the need to change gears, and the machine is backed by the industry-leading JET Two Year Warranty. Key Features One-piece cast iron base absorbs vibrations during operation to allow heavier cuts and ensure accuracy Universal Gearbox eliminates the need to change gears for faster, more efficient setups Large 3-1/8 in. spindle bore accommodates larger workpieces with ease 12 spindle speeds ranging from 25-1,800 RPM for versatile material and operation compatibility Geared head drive with 7-1/2 HP motor (230/460V, 3-Phase) delivers robust cutting power 61 inch thread options (1-5/8-72 TPI) and 24 metric thread options (.05-20 mm) provide exceptional threading versatility 46 longitudinal and 31 cross feed rates for precise material removal control D1-8 spindle mount and MT-7 (MT-5) spindle taper with sleeve for broad tooling compatibility 12-1/4 in. gap length expands workpiece capacity beyond standard swing ACU-RITE 203 DRO included for enhanced positional accuracy and efficiency Steady rest included for added workpiece support during turning operations Backed by the industry-leading JET Two Year Warranty Specifications Stock Number: 321475 Size: 16 x 40 Motor: 7-1/2 HP, 230/460, 3 Ph Drive: Geared Head Spindle Bore: 3-1/8 in. Spindle Mount: D1-8 Spindle Taper with Sleeve: MT-7 (MT-5) Number of Spindle Speeds: 12 Range of Spindle Speeds: 25-1,800 RPM Carriage Travel: 35 in. Cross Slide Travel: 9 in. Compound Slide Travel: 5-1/8 in. Max Tool Size: 1 x 1 in. Length of Gap: 12-1/4 in. Number of Inch Threads: 61 Range of Inch Threads: 1-5/8-72 TPI Number of Metric Threads: 24 Range of Metric Threads: .05-20 Number of Longitudinal and Cross Feed Rates: 46/31 Range of Longitudinal Feeds: .0015-.0900 IPR Range of Cross Feeds: .0006-.0360 IPR Overall Dimensions (L x W x H): 96 x 44 x 66 in. Prop 65: Cancer and Reproductive Harm What's Included ACU-RITE 203 DRO Steady Rest Frequently Asked Questions What is the spindle bore size on the GH-1640ZX? The GH-1640ZX features a large 3-1/8 in. spindle bore, allowing operators to pass larger-diameter stock through the spindle for greater workpiece versatility. How many spindle speeds does this lathe offer, and what is the speed range? This lathe provides 12 spindle speeds ranging from 25-1,800 RPM, giving operators a wide range of options to match cutting speed to the material and operation at hand. Does the GH-1640ZX support both inch and metric threading? Yes. The GH-1640ZX offers 61 inch thread options covering 1-5/8-72 TPI and 24 metric thread options ranging from .05-20 mm, making it suitable for a broad spectrum of threading tasks without changing gears, thanks to the Universal Gearbox. What power requirements does the GH-1640ZX motor have? The lathe is powered by a 7-1/2 HP motor rated for 230/460V, 3-Phase electrical service, making it suited for industrial and professional shop environments with three-phase power available.