The JET JTM-4VS Mill with Air Powered Draw Bar is a professional-grade variable speed vertical milling machine engineered for precision metalworking and machining operations. Built on a Certified Meehanite casting process foundation, this JET mill delivers consistent, reliable performance through a wide spindle speed range of 60 to 4,200 RPM, making it equally capable of heavy stock removal and fine finish work. The pneumatic draw bar, precision hardened and ground ways, and one-shot lubrication system combine to maximize both efficiency and longevity on the shop floor.

Key Features

• Adjustable gibs throughout for precise fit and minimal play across all axes
• Heavy duty splined motor drive for robust, dependable power transmission
• Internal coolant tank built into casting base for use with coolant system (coolant pump not included)
• Large diameter quill is chromed for smooth travel and extended wear resistance
• One shot lubrication system for convenient and thorough way lubrication
• Precision hardened and ground ways and table ensure accuracy and long-term repeatability
• Spindle head is internally cooled to maintain optimal operating temperatures during extended use
• Precision bored and honed milling head for quality, consistent cuts
• Three-stage power downfeed with automatic stop for operator ease and process control
• Tolerance test sheet included to verify machine accuracy out of the box
• Backed by an industry-leading two-year full service and parts warranty

Specifications

• MPN: JT9-690119
• Stock Number: 690119
• 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 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
• Travel of Knee (In.): See product documentation
• Power Draw Bar: Pneumatic
• Overall Dimensions (L x W x H) (In.): 66 x 63 x 85
• Country of Origin: China
• Prop 65: Cancer and Reproductive Harm

What's Included

• Tolerance test sheet

Frequently Asked Questions

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

The JTM-4VS uses an R-8 spindle taper, which is one of the most common and widely supported tapers in vertical knee mill applications, offering broad compatibility with tooling and collets. The collet capacity ranges from 1/8 to 7/8 inch.

How does the air powered draw bar work on this mill?

The draw bar on the JTM-4VS is pneumatically (air) powered, allowing for faster and easier tool changes compared to a manual draw bar. This reduces operator fatigue and speeds up workflows in production or busy shop environments.

Does this mill include a coolant pump?

The JTM-4VS 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.

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

The spindle on the JTM-4VS operates across a wide variable speed range of 60 to 4,200 RPM. This broad range makes the machine suitable for a variety of materials and operations, from slow heavy cuts to high-speed finish milling.