JET JTM-4VS Mill with ACU-RITE 203 DRO, X-Axis Powerfeed, and Power Draw Bar is a professional-grade vertical milling machine engineered by JET for demanding machining environments. Built on a Certified Meehanite casting process, this variable speed mill delivers consistent, reliable cutting performance across a wide range of metalworking and fabrication applications. The integration of the ACU-RITE 203 Digital Readout, X-Axis Powerfeed, and pneumatic Power Draw Bar streamlines operation and enhances precision, making this machine a comprehensive solution for both production and toolroom work.

Key Features

• Adjustable gibs throughout for precise fit and minimal backlash across all axes
• Heavy duty splined motor drive for dependable, high-torque power transmission
• Internal coolant tank built into the casting base for use with a coolant system (coolant pump not included)
• Large diameter chromed quill for enhanced durability and smooth travel
• One-shot lubrication system for convenient, thorough machine lubrication
• Precision hardened and ground ways and table for superior accuracy and long-term wear resistance
• Spindle head is internally cooled to maintain optimal operating temperatures during extended use
• Precision bored and honed milling head ensures quality, repeatable cuts
• Three-stage power downfeed with automatic stop for ease of use and consistent depth control
• ACU-RITE 203 Digital Readout (DRO) for real-time, high-accuracy positional feedback
• X-Axis Powerfeed for effortless, consistent table movement along the longitudinal axis
• Pneumatic Power Draw Bar for fast, tool-free spindle tooling changes
• Variable spindle speed ranging from 60 to 4,200 RPM to accommodate a wide variety of materials and operations
• Tolerance test sheet included for documented out-of-box accuracy verification
• Backed by an industry-leading two-year full service and parts warranty

Specifications

• Stock Number: 690125
• MPN: JT9-690125
• 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
• Overall Dimensions (L x W x H) (In.): 66 x 63 x 85
• Number of Axis: 2
• Powerfeed: X-Axis
• Power Draw Bar: Pneumatic
• Prop 65: Cancer and Reproductive Harm
• Country of Origin: Taiwan

What's Included

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

Frequently Asked Questions

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

The JTM-4VS uses an R-8 spindle taper, which is one of the most common standards in vertical milling machines. It accepts collets ranging from 1/8 inch to 7/8 inch, providing broad compatibility with standard end mills, drill chucks, and toolholders.

Is a coolant pump included with this milling machine?

The machine 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 must be sourced separately if coolant-assisted machining is desired.

What variable spindle speed range does the JTM-4VS offer?

The JTM-4VS provides a variable spindle speed range of 60 to 4,200 RPM, allowing operators to dial in the optimal cutting speed for a wide variety of materials, including steel, aluminum, cast iron, and plastics.

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

The JTM-4VS offers three quill down feed rates - .0015, .003, and .006 inches per revolution (IPR) - via its three-stage power downfeed system, which also includes an automatic stop feature. This allows the operator to set a consistent depth of cut and have the quill stop automatically, reducing the chance of over-travel and improving repeatability across multiple operations.