JET JTM-4VS Mill with Newall DP700 DRO, X-Axis Powerfeed, and Power Draw Bar - 3 HP, 230/460V, 3Ph is a professional-grade vertical milling machine engineered for precision metalworking operations. Built on the proven Certified Meehanite casting process, this JET variable speed mill delivers consistent, reliable performance across a broad spindle speed range. The inclusion of a Newall DP700 Digital Readout, pneumatic power draw bar, and X-axis powerfeed makes this an exceptionally capable and operator-friendly machine suited for shops demanding accuracy, efficiency, and long-term durability.

Key Features

• Adjustable gibs throughout for precise fit and sustained accuracy over the life of the machine
• Heavy duty splined motor drive engineered to handle demanding cutting loads
• Internal coolant tank built into casting base for use with coolant system (coolant pump not included)
• Large diameter quill is chromed for enhanced wear resistance and smooth operation
• One shot lubrication system for convenient, reliable way and spindle lubrication
• Precision hardened and ground ways and table ensuring repeatable accuracy and surface integrity
• Spindle head is internally cooled to maintain consistent operating temperatures during prolonged use
• Tolerance test sheet included to verify machine accuracy right out of the crate
• Precision bored and honed milling head for quality, consistent cuts
• Three-stage power downfeed with automatic stop for controlled, repeatable quill travel
• Newall DP700 Digital Readout (DRO) for real-time, precise axis position feedback
• Pneumatic power draw bar for fast, easy tool changes
• X-axis powerfeed for automated, consistent table travel during cuts
• Variable spindle speed from 60 to 4,200 RPM to accommodate a wide range of materials and operations

Specifications

• Stock Number: JT9-690069-4
• Model Number: JTM-4VS
• Motor: 3 HP, 230/460V, 3Ph
• Style (Type): Variable Speed R8
• Spindle Taper: R-8
• Range of Spindle Speeds (RPM): 60 - 4,200
• Quill Diameter (In.): 3-3/8
• Quill Down Feed Rates (IPR): .0015 - .003 - .006
• Spindle Travel (In.): 5
• 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
• Travel of Knee (In.): 14-1/2
• Travel of Ram (In.): 13-3/8
• Distance Spindle to Column (Max.) (In.): 19
• Max Distance Spindle to Table (In.): 17-1/2
• Number of Axis: 2
• Powerfeed: X-Axis
• Power Draw Bar: Pneumatic
• Overall Dimensions (L x W x H) (In.): 66 x 63 x 85
• Weight (Lbs.): 2420
• Prop 65: Cancer and Reproductive Harm
• Country of Origin: Taiwan

What's Included

• Tolerance test sheet to verify machine accuracy upon delivery
• Newall DP700 Digital Readout (DRO)
• X-Axis Powerfeed
• Pneumatic Power Draw Bar

Frequently Asked Questions

What is the spindle speed range on the JET JTM-4VS, and why does it matter?

The JTM-4VS offers a variable spindle speed range of 60 to 4,200 RPM. This wide range allows operators to dial in the correct cutting speed for different materials - slower speeds for harder metals and faster speeds for softer materials - maximizing tool life and surface finish quality.

Does the JTM-4VS include a coolant pump?

No. While the machine features an internal coolant tank built directly into the casting base for use with a coolant system, the coolant pump is not included and must be sourced separately.

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

The JTM-4VS uses an R-8 spindle taper, which is the industry standard for Bridgeport-style knee mills. It accepts collets in the range of 1/8 to 7/8 inch, providing broad compatibility with standard tooling.

What is the benefit of the one shot lubrication system on this machine?

The one shot lubrication system allows the operator to quickly and evenly distribute lubrication to the ways and other critical moving components with a single action. This helps maintain smooth travel, reduces wear, and extends the service life of the precision hardened and ground ways and table.