JET JTM-4VS Mill with 3-Axis ACU-RITE 203 DRO (Knee) and X, Y & Z-Axis Powerfeeds is a professional-grade vertical milling machine from JET, engineered for precision metal removal and versatile machining applications. 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. With a 3 HP motor, a spindle speed range of 60 - 4,200 RPM, a fully integrated ACU-RITE 203 Digital Readout system on all three axes, and powerfeeds on the X, Y, and Z-axes, this machine is designed for demanding shop environments that require accuracy, repeatability, and efficient operation.

Key Features

• Adjustable gibs throughout for precise fit and smooth movement along all axes
• Heavy duty splined motor drive for reliable power transmission under load
• 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 simplifies maintenance and extends machine life
• Precision hardened and ground ways and table for accurate, repeatable machining results
• Spindle head is internally cooled to manage heat during extended operation
• Tolerance test sheet included for verification of machine accuracy out of the box
• Constructed using the Certified Meehanite casting process for consistent and reliable operation
• Precision bored and honed milling heads ensure quality cuts
• Three-stage power downfeed with automatic stop for ease of use and controlled depth
• 3-Axis ACU-RITE 203 Digital Readout (Knee) with X, Y, and Z-Axis powerfeeds for enhanced precision and productivity
• Available in single or three phase power configurations
• Backed by an industry-leading two-year full service and parts warranty
• Variable speed R-8 spindle taper configuration

Specifications

• MPN: JT9-690418
• Stock Number: 690418
• Country of Origin: United States
• 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 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
• Prop 65: Cancer and Reproductive Harm

Frequently Asked Questions

What spindle taper does the JET JTM-4VS Mill use?

The JET JTM-4VS Mill uses an R-8 spindle taper, which is a widely used standard in vertical milling machines. It accepts collets ranging from 1/8 to 7/8 inch in capacity and provides 5 inches of spindle travel.

Does this mill include a coolant pump with the internal coolant tank?

The JTM-4VS features an internal coolant tank built into the casting base for use with a coolant system; however, the coolant pump is not included and must be sourced separately.

What powerfeeds are included on this machine?

This configuration includes powerfeeds on the X, Y, and Z-axes, paired with the 3-Axis ACU-RITE 203 Digital Readout (Knee) for comprehensive positioning control across all three axes of movement.

What warranty is provided with the JET JTM-4VS Mill?

The JET JTM-4VS Series mills are backed by an industry-leading two-year full service and parts warranty, providing confidence in long-term performance and support. A tolerance test sheet is also included to confirm machine accuracy upon receipt.