JET JTM-4VS Mill with 3-Axis Newall DP700 DRO (Knee) and X, Y & Z-Axis Powerfeeds is a professional-grade vertical milling machine engineered by JET for demanding metalworking, toolmaking, and precision machining applications. Built on a Certified Meehanite casting process, this variable speed mill delivers consistent, reliable performance with precision bored and honed milling heads, a three-stage power downfeed with automatic stop, and a fully integrated 3-axis Newall DP700 Digital Readout system - making it an exceptional choice for machinists and shops that require accuracy, repeatability, and ease of use.

Key Features

• Adjustable gibs throughout for precise fit and long-term accuracy
• Heavy duty splined motor drive for smooth, consistent power transmission
• Internal coolant tank built into casting base for use with coolant system (coolant pump not included)
• Large diameter quill is chromed for durability and smooth operation
• One shot lubrication system for quick and efficient way lubrication
• Precision hardened and ground ways and table for superior surface accuracy and extended service life
• Spindle head is internally cooled to reduce heat buildup during extended operation
• Tolerance test sheet included for verified out-of-box precision
• Three-stage power downfeed with automatic stop for reliable, repeatable quill movement
• 3-axis Newall DP700 Digital Readout (Knee) with X, Y, and Z-axis powerfeeds for precise positioning and efficient machining
• Variable spindle speed range from 60 to 4,200 RPM to suit a wide variety of materials and cutting operations
• Available in single or three phase power configurations
• Backed by an industry-leading two-year full service and parts warranty

Specifications

• Stock Number: 690093
• Style (Type): Variable Speed R8
• 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
• Number of Axis: 3 (Knee)
• Powerfeed: X, Y and Z-Axis
• Table Size (L x W) (In.): 9 x 4
• 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
• 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

• Tolerance test sheet for verified precision upon delivery
• 3-axis Newall DP700 Digital Readout (Knee)
• X, Y, and Z-axis powerfeeds

Frequently Asked Questions

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

The JET JTM-4VS uses an R-8 spindle taper, which is one of the most common and widely supported tapers in manual vertical milling. It accepts collets ranging from 1/8 inch to 7/8 inch, providing broad compatibility with standard tooling for a wide variety of milling and drilling operations.

Does this mill include a coolant pump with the built-in coolant tank?

The JTM-4VS features an internal coolant tank built directly into the casting base, designed for use with a coolant system. However, the coolant pump is not included and would need to be sourced separately to take advantage of the integrated tank.

What is the spindle speed range, and how is the speed adjusted on this machine?

The JTM-4VS offers a variable spindle speed range of 60 to 4,200 RPM. The variable speed design allows the operator to dial in the appropriate cutting speed for different materials and tooling without changing belts or gears, supporting efficient and versatile machining across a broad range of applications.

What does the 3-axis Newall DP700 DRO system provide on this mill?

The integrated Newall DP700 Digital Readout system provides real-time position feedback on all three axes - X, Y, and Z (Knee) - allowing machinists to make precise, repeatable cuts with confidence. Combined with the X, Y, and Z-axis powerfeeds, the DRO significantly reduces setup time, minimizes manual measurement errors, and improves overall machining accuracy and productivity.