JET JTM-1254RVS Variable Speed Vertical Mill with X, Y & Z Powerfeeds is a professional-grade 12" x 54" vertical milling machine engineered by JET to deliver exceptional durability, strength, and precision. Built for demanding industrial and shop environments, this heavy-duty mill combines variable spindle speed control with three-axis powerfeeds, giving machinists the versatility and accuracy needed to produce high-quality components consistently. Backed by the industry-leading JET Two Year Warranty, the JTM-1254RVS is offered with an R-8 spindle taper and is powered by a 5HP, 230/460V, 3-phase motor capable of spindle speeds ranging from 80 to 3,800 RPM.

Key Features

• Adjustable gibs throughout for precise fit and smooth movement across all axes
• Dual locks on all moveable surfaces provide superior rigidity and workholding stability during cuts
• Heavy-duty spindle brake for rapid stopping of the spindle, improving safety and workflow efficiency
• Precision bored and honed milling head ensures accurate spindle alignment and long-term performance
• Precision hardened and ground ways and table for enhanced wear resistance and dimensional accuracy
• Three precision ground T-slots with 2-1/2" T-slot centers for secure and versatile workpiece fixturing
• Three-stage power downfeed with automatic stop for controlled, repeatable depth of cut operations
• Two 115V outlets on the electrical box dedicated exclusively for powerfeed connections
• Ongoing automatic lubrication system keeps critical components protected during extended operation
• Quick nut spindle feed for fast and convenient quill depth adjustments
• JET exclusive new casting design enables easier machine leveling without raising the unit off the floor
• Available in both R-8 and NT-40 spindle configurations to suit a range of tooling preferences

Specifications

• MPN: JT9-698088
• Stock Number: 698088
• Style (Type): Variable Speed R8
• Spindle Taper: R-8
• Motor: 5HP, 230/460V, 3Ph
• Range of Spindle Speeds (RPM): 80 - 3,800
• Collet Capacity: 1/8 - 1
• Spindle Travel (In.): 5
• Quill Diameter (In.): 4-1/8
• Quill Down Feed Rates (IPR): .0015 / .003 / .008
• Max Distance Spindle to Table (In.): 23
• Distance Spindle to Column (Max.) (In.): 27-3/4
• Column Width (In.): 14-1/4
• Saddle Width (In.): 25-5/8
• T-Slot Centers (In.): 2-1/2
• Overall Dimensions (L x W x H) (In.): 92-1/8 x 79-7/8 x 104-1/4
• Country of Origin: Taiwan
• Prop 65: Cancer and Reproductive Harm

Frequently Asked Questions

What spindle taper does the JET JTM-1254RVS use?

The JTM-1254RVS is configured with an R-8 spindle taper and accepts collets ranging from 1/8" to 1". JET also offers the JTM-1254VS in an NT-40 spindle configuration for shops that prefer that tooling standard.

What are the available quill down feed rates on this mill?

The three-stage power downfeed system offers three selectable feed rates: .0015, .003, and .008 inches per revolution (IPR). The automatic stop feature allows for precise, repeatable depth control during drilling and boring operations.

What electrical requirements are needed to run the JTM-1254RVS?

This mill requires a 230/460V, 3-phase power supply to drive its 5HP motor. Additionally, the electrical box includes two dedicated 115V outlets intended exclusively for connecting the X, Y, and Z powerfeeds.

What is the maximum spindle-to-table distance and the full spindle speed range?

The maximum distance from the spindle to the table is 23 inches, providing ample clearance for a wide range of workpiece heights and tooling setups. The variable speed drive delivers a spindle speed range of 80 to 3,800 RPM, allowing the operator to fine-tune cutting speeds for different materials and operations.