JET JTM-4VS Mill with 3-Axis Newall DP700 DRO (Quill) is a professional-grade vertical milling machine from JET, engineered for machinists and production shops that demand precision, repeatability, and versatile performance. Built on the proven Certified Meehanite casting process, this variable speed knee mill pairs a wide spindle speed range with an integrated 3-axis Newall DP700 digital readout on the quill axis, giving operators real-time positional accuracy and streamlined workflow on complex milling operations.

Key Features

• Adjustable gibs throughout for precise fit and long-term accuracy across all axes
• Heavy duty splined motor drive delivers reliable, consistent power transfer to the spindle
• Internal coolant tank built into the casting base for use with a coolant system (coolant pump not included)
• Large diameter quill is chromed for smooth, durable operation and extended service life
• One-shot lubrication system simplifies maintenance and protects critical sliding surfaces
• Precision hardened and ground ways and table ensure accuracy and resist wear over high-volume use
• Spindle head is internally cooled to maintain thermal stability during extended cutting cycles
• Precision bored and honed milling head for quality, repeatable cuts
• Three-stage power downfeed with automatic stop for controlled, hands-free quill feeding
• Wide variable spindle speed range of 60 - 4,200 RPM accommodates a broad range of materials and tooling
• Tolerance test sheet included for out-of-box verification of machine accuracy
• Backed by JET's industry-leading two-year full service and parts warranty

Specifications

• Country of Origin: Taiwan
• Stock Number: 691202
• Style (Type): Variable Speed R8
• Number of Axis: 3 (Quill)
• 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 Size (L x W) (In.): 9 x 49
• 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
• Distance Spindle to Column, Max. (In.): 19
• Max Distance Spindle to Table (In.): 17-1/2
• Travel of Knee (In.): See machine documentation
• Overall Dimensions (L x W x H) (In.): 66 x 63 x 85
• Prop 65: Cancer and Reproductive Harm

What's Included

• JET JTM-4VS Variable Speed Knee Mill
• 3-Axis Newall DP700 Digital Readout (Quill)
• Tolerance test sheet

Frequently Asked Questions

What spindle taper does the JET JTM-4VS use, and what collet sizes are compatible?

The JTM-4VS uses an R-8 spindle taper, which is one of the most widely supported standards in manual milling. It accepts collets ranging from 1/8 inch to 7/8 inch, giving operators broad tooling flexibility for end mills, drill chucks, shell mill arbors, and other R-8 compatible toolholders.

Is a coolant pump included with this machine?

No, a coolant pump is not included. However, the machine features an internal coolant tank built directly into the casting base, which is fully prepared for use with a coolant system. The integrated tank allows operators to add a compatible coolant pump separately without external modification to the machine.

What power supply does the JTM-4VS require?

The JTM-4VS is equipped with a 3 HP motor rated for 230/460V, 3-phase power. Shops should confirm their electrical service meets three-phase requirements before installation. This motor configuration is well-suited for production environments with standard industrial power.

How is the accuracy of this mill verified before use?

Each JET JTM-4VS ships with a tolerance test sheet that documents the machine's measured accuracy as it left the factory. This provides out-of-box confidence that the mill meets JET's precision standards and gives machinists a baseline reference for the machine's performance.