Introduction

This manual is provided by JET, covering the safe operation and maintenance procedures for a JET Model JTM-4VS Turret Milling Machine. This manual contains instructions on installation, safety precautions, general operating procedures, maintenance instructions and parts breakdown. This machine has been designed and constructed to provide years of trouble free operation if used in accordance with instructions set forth in this manual. If there are any questions or comments, please contact either your local supplier or JET. JET can also be reached at our web site: www.jettools.com.

Specifications

Model Number

JTM-4VS-1

............................................. JTM-4VS-3

Stock Number

690180

.................................................. 690182

Spindle Taper

R-8

......................................................... R-8

Diameter of Quill (in.)

3.375

...................................................... 3.375

Number of Spindle Speeds

Variable

.................................................. Variable

Range of Spindle Speeds (RPM)

60 to 4200

...............................................60 to 4200

Downfeeds per Revolution of Spindle (in.)

0.0015, 0.003, 0.006

............................... 0.0015, 0.003, 0.006

Spindle Travel (in.)

5

............................................................. 5

Head Movement – Left and Right (deg.)

90

........................................................... 90

Head Movement – Fore and Aft (deg.)

45

........................................................... 45

Maximum Distance Spindle to Table (in.)

17-1/2

..................................................... 17-1/2

Maximum Distance Spindle to Column (in.)

19

........................................................... 19

Minimum Distance Spindle to Column (in.)

4-1/2

....................................................... 4-1/2

Collet Capacity (in.)

1/8 – 7/8

..................................................1/8 – 7/8

Table Size (in.)

9 x 49

......................................................9 x 49

Longitudinal Table Travel, maximum (in.)

34

........................................................... 34

Table Cross Travel, maximum (in.)

12

........................................................... 12

Number of T-Slots

3

............................................................. 3

T-Slot Size (WxD)(in.)

5/8 x 3/4

..................................................5/8 x 3/4

T-Slot Centers (in.)

2-1/2

....................................................... 2-1/2

Table Load, maximum (lbs.)

660

........................................................ 660

Knee Travel, maximum (in.)

14-1/2

..................................................... 14-1/2

Ram Travel, maximum (in.)

13-3/8

..................................................... 13-3/8

Overall Dimensions (in.)

66W x 63D x 85H

....................................66W x 63D x 85H

Motor

TEFC 2HP, 1PH, 115/230V, 60Hz

..........TEFC 3 HP, 3PH, 230/460V, 60Hz

 

 

(prewired 230V)

(prewired 230V)

Net Weight, approx. (lbs.)

2,420

...................................................... 2,420

The above specifications were current at the time this manual was published, but because of our policy of continuous improvement, JET reserves the right to change specifications at any time and without prior notice, without incurring obligations.

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Jet Tools operating instructions Introduction Specifications, JTM-4VS-1, 690180
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JTM-4VS specifications

The Jet Tools JTM-4VS is a highly regarded vertical mill that caters to the demands of both professional machinists and serious hobbyists. This versatile piece of machinery combines precision engineering with innovative features, making it a popular choice in workshops and fabrication shops.

One of the standout characteristics of the JTM-4VS is its powerful 1.5 HP motor that operates on either 115V or 230V power supply, providing flexibility depending on the workshop setup. The motor offers variable speed control, from 60 to 4200 RPM, allowing users to adjust speeds according to the material being machined. This capability makes it ideal for a wide range of applications, from heavy milling on steel to delicate work on softer materials like aluminum.

The JTM-4VS is equipped with a robust cast iron column and base, which contribute to its stability and durability. This construction minimizes vibrations during operation, resulting in improved precision and surface finish on machined parts. The table measures 9” x 49”, providing ample workspace for various projects, and is fitted with T-slots for easy clamping of workpieces.

Another notable feature of the JTM-4VS is its easy-to-use digital readout (DRO) system that assists users in making precise adjustments and measurements. The DRO enhances the overall efficiency of the milling process, allowing operators to focus on the task at hand rather than relying solely on manual measurements.

The machine also incorporates a high-grade, hardened and ground bedway that ensures smooth operation and long-lasting performance. This feature not only extends the longevity of the mill but also allows for precise vertical and horizontal movements.

Safety is a primary concern in any workshop, and Jet has addressed this with various safety features integrated into the JTM-4VS. The mill is designed with a protective shield and emergency stop button, ensuring operators can work confidently.

In summary, the Jet Tools JTM-4VS stands out for its combination of robust construction, versatile functionality, and user-friendly technologies. With its powerful motor, variable speed capabilities, and precision features, it is an excellent investment for anyone looking to enhance their machining capabilities in the workshop. Whether it's for industrial applications or intricate projects, the JTM-4VS delivers reliable performance and exceptional results.
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