JET JTM-4VS-1 Mill with 3-Axis ACU-RITE 203 DRO (Quill) and X & Y-Axis Powerfeeds is a professional-grade vertical milling machine from JET, engineered for machinists and fabricators who demand precision, durability, and versatile performance. Built using the Certified Meehanite casting process, this variable speed mill delivers consistent and reliable operation across a wide spindle speed range of 60 to 4,200 RPM, making it equally capable of heavy material removal and fine finishing work. Paired with a 3-axis ACU-RITE 203 DRO for quill operations and powerfeeds on both the X and Y axes, this mill is designed to maximize accuracy and operator efficiency in demanding shop environments. Backed by JET's industry-leading two-year full service and parts warranty, the JTM-4VS-1 is a long-term investment in shop productivity.

Key Features

• Adjustable gibs throughout for precise fit and reduced play across all axes
• Heavy duty splined motor drive for reliable power transmission under load
• 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, wear-resistant operation
• One-shot lubrication system for easy and consistent way lubrication
• Precision hardened and ground ways and table for long-term accuracy and surface integrity
• Spindle head is internally cooled to maintain operating temperatures during extended use
• Tolerance test sheet included to verify machine accuracy out of the box
• Precision bored and honed milling head ensures quality cuts
• Three-stage power downfeed with automatic stop for ease of use and repeatable depth control
• 3-Axis ACU-RITE 203 DRO (Quill) provides real-time positional readout for improved accuracy
• X and Y-Axis powerfeeds reduce operator fatigue and improve table movement consistency
• Available in single-phase power configuration (2 HP, 115/230V, 1Ph)

Specifications

• Stock Number: 690068
• MPN: JT9-690068
• Motor: 2 HP, 115/230V, 1Ph
• 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 (Quill)
• Powerfeed: X and Y-Axis
• 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
• Overall Dimensions (L x W x H) (In.): 66 x 63 x 85
• Style (Type): Variable Speed R8
• Country of Origin: Taiwan
• Prop 65: Cancer and Reproductive Harm

What's Included

• JET JTM-4VS-1 Variable Speed Vertical Mill
• ACU-RITE 203 3-Axis DRO (Quill)
• X-Axis Powerfeed
• Y-Axis Powerfeed
• Tolerance test sheet

Frequently Asked Questions

What is the spindle speed range on the JET JTM-4VS-1, and what does variable speed mean for milling operations?

The JET JTM-4VS-1 offers a spindle speed range of 60 to 4,200 RPM. Variable speed control allows the operator to dial in the optimal cutting speed for different materials and tooling diameters without changing belt positions, enabling smoother transitions and greater versatility across a wide range of milling tasks.

What spindle taper does this mill use, and what collet sizes are compatible?

This mill uses an R-8 spindle taper, which is one of the most common standards in manual vertical milling machines. The collet capacity ranges from 1/8 to 7/8 inch, accommodating a wide variety of end mills, collets, and toolholders designed for the R-8 standard.

Does the JTM-4VS-1 include a coolant pump?

The machine features an internal coolant tank built into the casting base for use with a coolant system; however, the coolant pump is not included. The integrated tank is ready to accept a separately purchased coolant pump for shops that require coolant-assisted machining.

What are the quill down feed rates, and how does the power downfeed system work?

The quill down feed rates are .0015, .003, and .006 inches per revolution (IPR), offering three selectable feed rates to match the requirements of different drilling and boring operations. The three-stage power downfeed system includes an automatic stop feature, allowing the operator to set a repeatable depth limit for consistent results without manual intervention at the end of each pass.