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Jet Tools JTM-4VS Feed Trip Cam Lever, Feed Direction Control, Coarse Feed Handle

Models: JTM-4VS

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Feed Trip Cam Lever

The Feed Trip Cam Lever (A, Figure 12) is located on the left side of the head behind the Manual Fine Feed Handwheel (B, Figure 12). It engages the overload clutch on the pinion shaft when positioned to the left. The Feed Trip Cam Lever stays engaged until Quill Stop (C, Figure 15) comes in contact with Micrometer Adjusting Nut (A, Figure 15) forcing it to drop out automatically, or until it is released manually by engaging the lever to the right.

Figure 12

Feed Direction Control

The Feed Direction Control (B, Figure 13) determines whether the power feed will move up, down, or not move at all. The position of the knob depends upon the direction of spindle rotation (see the Motor Switch section). The position of the control may be changed with the system stopped or running. If the control does not engage easily, move the fine feed handwheel (A, Figure 13) back and forth to aid engagement.

If the spindle is rotating clockwise, in is downfeed; out is upfeed. If the spindle rotation is counterclockwise, out is downfeed; in is upfeed. Neutral position is between the in and out position.

It is recommended that the Feed Direction Knob be left in the

neutral position when not in use.

Figure 13

Coarse Feed Handle

The Coarse Feed Handle (A, Figure 14) is located on the right side of head. The Coarse Feed Handle is used for non-precision drilling operations and for moving the quill to a specific depth. A return spring will retract the spindle automatically once the handle is released.

Quill Lock Lever

The Quill Lock Lever (B, Figure 14) is located on the right side of the head. Rotate the handle clockwise to lock the quill in a desired position. Rotate the handle counter-clockwise to release.

Figure 14

Micrometer Adjusting Nut

The Micrometer Adjusting Nut (A, Figure 15) is located on the front of the head. Use for setting specific spindle depth. Secure with the lock nut (B, Figure 15).

Fine Feed Handwheel

When the controls are set for the Fine feed using Handwheel position (see Figure 6), the Fine Feed Handwheel (A, Figure 13) can be used for manual fine feed control in either upward or downward direction of the quill.

Remove the Manual Fine Feed Handwheel when not in use.

Failure to comply may cause serious injury.

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Jet Tools JTM-4VS Feed Trip Cam Lever, Feed Direction Control, Coarse Feed Handle, Quill Lock Lever, Fine Feed Handwheel
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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.