JET JTM-4VS Mill with 3-Axis Newall DP700 DRO (Quill), X Y & Z-Axis Powerfeeds, and Power Draw Bar is a professional-grade variable speed vertical milling machine engineered by JET for precision metalworking operations. Built on the certified Meehanite casting process, this full-featured mill combines a 3 HP motor, pneumatic power draw bar, three-axis powerfeeds, and an integrated Newall DP700 digital readout to deliver repeatable accuracy and operator efficiency in demanding shop environments.

Key Features

• Adjustable gibs throughout for precise fit and reduced play across all axes
• Heavy duty splined motor drive for reliable power transmission under load
• Internal coolant tank built into the casting base for use with a coolant system (coolant pump not included)
• Large diameter chromed quill for smooth, wear-resistant travel
• One-shot lubrication system for fast, consistent lubrication of critical components
• Precision hardened and ground ways and table for long-term accuracy and surface quality
• Spindle head is internally cooled to maintain performance during extended operations
• Tolerance test sheet included to verify machine accuracy out of the box
• Certified Meehanite casting process provides consistent, vibration-damping rigidity
• Precision bored and honed milling head ensures quality cuts
• Three-stage power downfeed with automatic stop for repeatable quill depth control
• 3-Axis Newall DP700 DRO (Quill) for real-time positional readout on X, Y, and Z axes
• X, Y, and Z-axis powerfeeds for automated table and quill movement
• Pneumatic power draw bar for fast, consistent toolholder clamping and release
• Variable spindle speed range from 60 to 4,200 RPM for versatility across materials and operations
• R-8 spindle taper - the industry-standard for Bridgeport-style mills
• Available in single or three phase power configurations
• Backed by JET's industry-leading two-year full service and parts warranty

Specifications

• Stock Number: 691170
• MPN: JT9-691170
• Motor: 3 HP, 230/460V, 3Ph
• Range of Spindle Speeds (RPM): 60 - 4,200
• Spindle Taper: R-8
• Spindle Travel (In.): 5
• Quill Diameter (In.): 3-3/8
• Quill Down Feed Rates (IPR): .0015 - .003 - .006
• Collet Capacity: 1/8 - 7/8
• Table Longitudinal Travel (In.): 34
• Table Longitudinal Travel With Powerfeed (In.): 28-3/4
• Table Cross Travel (In.): 12
• T-Slot Centers (In.): 2-1/2
• Max Distance Spindle to Table (In.): 17-1/2
• Distance Spindle to Column - Max. (In.): 19
• Number of Axis: 3 (Quill)
• Powerfeed: X, Y and Z-Axis
• Power Draw Bar: Pneumatic
• Style (Type): Variable Speed R8
• Overall Dimensions (L x W x H) (In.): 66 x 63 x 85
• Country of Origin: Taiwan
• Prop 65: Cancer and Reproductive Harm

What's Included

• JET JTM-4VS Variable Speed Vertical Mill
• 3-Axis Newall DP700 DRO (Quill) - X, Y, and Z-Axis
• X, Y, and Z-Axis Powerfeeds
• Pneumatic Power Draw Bar
• Tolerance test sheet

Frequently Asked Questions

What is the spindle speed range on the JET JTM-4VS, and what does variable speed mean for my machining work?

The JTM-4VS offers a variable spindle speed range of 60 to 4,200 RPM. Variable speed means you can dial in the exact RPM needed for your material and tool diameter without stopping to change belt positions, giving you smooth, stepless speed control for operations ranging from heavy face milling at low speeds to high-speed finish end milling.

What does the Newall DP700 DRO add to this mill, and which axes does it cover?

The integrated Newall DP700 Digital Readout provides real-time positional display on all three axes - X (table longitudinal), Y (table cross), and Z (quill) - allowing you to precisely track and set cutting positions without relying solely on handwheel dials. This significantly reduces setup time, eliminates cumulative measurement error, and improves part-to-part repeatability.

How does the pneumatic power draw bar work, and why is it beneficial?

The pneumatic power draw bar uses air pressure to rapidly clamp and release R-8 toolholders in the spindle. Instead of manually spinning a wrench to tighten or loosen the draw bar, the operator actuates the pneumatic system with a button, dramatically speeding up tool changes and reducing fatigue during high-volume or production work.

Does the JTM-4VS include a coolant pump, and how is the coolant system integrated?

The JTM-4VS features an internal coolant tank built directly into the casting base, which provides a clean, space-saving reservoir ready for connection to a coolant system. However, the coolant pump is not included and must be sourced separately. The built-in tank means no external reservoir is needed once a compatible pump is added.