JET JTM-4VS Mill with ACU-RITE 203 DRO, X & Y-Axis Powerfeeds, and Power Draw Bar is a professional-grade vertical milling machine engineered by JET for demanding machining operations. Built on the Certified Meehanite casting process, this variable speed mill delivers consistent, reliable performance with precision bored and honed milling heads for quality cuts. Featuring an ACU-RITE 203 Digital Readout system, X and Y-axis powerfeeds, and a pneumatic power draw bar, this machine is designed to maximize productivity and accuracy for serious metalworking applications. The three-stage power downfeed with automatic stop adds an additional layer of operational ease, and the mill is backed by JET's industry-leading two-year full service and parts warranty.

Key Features

• Adjustable gibs throughout for precise fit and reduced play across all axes
• Heavy duty splined motor drive ensures reliable power transmission under demanding cutting loads
• 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 long service life
• One shot lubrication system simplifies maintenance and helps protect critical moving components
• Precision hardened and ground ways and table for exceptional accuracy and repeatability
• Spindle head is internally cooled to maintain consistent operating temperatures during extended use
• Tolerance test sheet included to verify machine accuracy right out of the box
• Constructed using the Certified Meehanite casting process for rigid, vibration-resistant performance
• Precision bored and honed milling head ensures quality, consistent cuts
• Three-stage power downfeed with automatic stop for controlled, repeatable plunge operations
• ACU-RITE 203 Digital Readout (DRO) on X and Y-axes for precise positional feedback
• Pneumatic power draw bar for fast, efficient tool changes
• X and Y-axis powerfeeds for automated, consistent table movement
• Variable spindle speed range from 60 to 4,200 RPM to suit a wide variety of materials and tooling
• Available in single or three phase power configurations
• Backed by JET's industry-leading two-year full service and parts warranty

Specifications

• MPN: JT9-690230
• Stock Number: 690230
• 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
• 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
• Powerfeed: X and Y-Axis
• Power Draw Bar: Pneumatic
• Number of Axis: 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

• JET JTM-4VS Variable Speed Milling Machine
• ACU-RITE 203 Digital Readout (DRO) - X and Y-Axis
• X and Y-Axis Powerfeeds
• Pneumatic Power Draw Bar
• Tolerance test sheet

Frequently Asked Questions

What spindle taper does the JET JTM-4VS use, and what is the collet capacity range?

The JTM-4VS uses an R-8 spindle taper, which is one of the most common and versatile tapers in vertical milling. The collet capacity ranges from 1/8 inch to 7/8 inch, accommodating a wide variety of tooling for different machining applications.

Does this mill include a coolant system?

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

What is the spindle speed range, and how does the variable speed function benefit machining operations?

The spindle speed ranges from 60 to 4,200 RPM. This wide variable speed range allows operators to dial in the optimal cutting speed for different materials and tooling types - from slow, heavy-duty cuts in hard metals at lower RPMs to high-speed finishing passes in softer materials at higher RPMs - all without stopping to change belt positions.

What warranty does the JET JTM-4VS carry?

The JET JTM-4VS is backed by JET's industry-leading two-year full service and parts warranty, providing confidence in long-term reliability and manufacturer support for this professional-grade milling machine.