JET JTM-1 Mill with ACU-RITE 203 DRO is a precision vertical knee mill engineered by JET for demanding metalworking operations that require accuracy, rigidity, and repeatable results. Built on Certified Meehanite castings for rugged stability, this step-pulley mill pairs a three-stage power down feed with automatic stop and an integrated ACU-RITE 203 two-axis digital readout, giving machinists the positional feedback needed to achieve tight tolerances on every pass. High-precision Class 7 spindle bearings and an internally cooled spindle head prevent seizing and support consistent performance across a wide range of milling, drilling, and boring applications. Backed by the industry-leading JET Two Year Warranty, the JTM-1 delivers professional-grade capability for job shops and production floors alike.

Key Features

• Heavy duty splined motor drive for reliable, consistent power transmission
• Internal coolant tank built into base for use with coolant system (coolant pump not included)
• Large diameter quill is chromed for smooth, durable operation
• One shot lubrication system for simplified maintenance and extended way life
• Precision bored and honed milling head ensures accurate spindle alignment
• Precision hardened and ground ways for consistent, low-friction table movement
• Satin chrome finished dials for easy, glare-free reading during operation
• Tolerance test sheet included for verified out-of-box accuracy
• Three-stage power down feed with automatic stop for controlled, repeatable depth cuts
• High precision Class 7 spindle bearings for minimal runout and long service life
• Certified Meehanite castings provide a rigid, vibration-damping machine base
• Internally cooled spindle head prevents seizing during extended operations
• ACU-RITE 203 two-axis digital readout integrated for precise positional feedback
• 16 spindle speeds across a 80-5,440 RPM range to accommodate diverse materials and tooling

Specifications

• MPN: JT9-690244
• Stock Number: 690244
• Country of Origin: Taiwan
• Style (Type): Step Pulley R8
• Motor: 2 HP, 230V, 3Ph
• Number of Spindle Speeds: 16
• Range of Spindle Speeds (RPM): 80-5,440
• 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: 2
• Table Size (L x W) (In.): 9 x 42
• Table Longitudinal Travel (In.): 23-7/8
• Table Longitudinal Travel With Powerfeed (In.): 20-2/7
• Table Cross Travel (In.): 12-1/2
• 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.): 57 x 64 x 82
• Prop 65: Cancer and Reproductive Harm

What's Included

• JET JTM-1 vertical knee mill
• ACU-RITE 203 two-axis digital readout (DRO)
• Tolerance test sheet

Frequently Asked Questions

What spindle taper does the JTM-1 use, and what collet sizes are compatible?

The JTM-1 uses an R-8 spindle taper, which is one of the most common standards in vertical knee mills. Compatible collet capacity ranges from 1/8-7/8 inch, allowing the use of a wide variety of end mills, drill chucks, and toolholders in the R-8 format.

Does the JTM-1 come ready to use with a coolant system?

The machine features an internal coolant tank built into the base for use with a coolant system; however, the coolant pump is not included and must be purchased separately. The built-in tank provides a convenient, self-contained reservoir once a compatible pump is added.

How many spindle speeds does the JTM-1 offer, and what is the speed range?

The JTM-1 provides 16 spindle speeds spanning 80-5,440 RPM via its step pulley drive system. This broad range supports everything from slow, heavy-feed face milling to high-speed finish work on aluminum and other non-ferrous materials.

What power supply is required to operate the JTM-1?

The JTM-1 is powered by a 2 HP motor rated at 230V, 3-phase. Ensure your facility has a compatible 230V three-phase electrical service and appropriate disconnect before installation.