Jet Tools JTM-4VS operating instructions Adjustments, Draw Bar Operation Changing Tooling

Draw Bar Operation - Changing Tooling

1.Using the wrench provided with the machine, loosen the draw bar two or three turns (turn counterclockwise) using the draw bar hex (Figure 18).

Figure 18

2.Tap the top of the draw bar with a soft-faced hammer to loosen the collet from the taper.

3.Remove the tool from the collet.

4.Insert the tool you are going to use into the collet.

5.Tighten the draw bar firmly using the wrench provided with the machine. Turn the draw bar. The tool is now ready for use.

Clamping Work Piece to the Table

1.The worktable has 5/8-inch T-slots for clamping the work piece to the table.

2.Set motor switch to STOP position.

3.Place the work piece on the table.

4.Clamp the work piece using the T-slot clamps, studs, and step blocks as required (Figure 19).

Figure 19

Adjustments

Mill Head – Left/Right Adjustment

Make sure the machine base is secured to the floor before repositioning the mill head. The center of gravity can shift enough to cause the machine to tip over, resulting in serious injury to the operator and damage to the machine.

1.Loosen four large hex nuts that secure the mill head to the ram adapter (refer to Figure 20).

1/4 turn should be sufficient to allow the head to move.

NOTE: For angles greater than 10 degrees, use your free hand to support the mill head, taking some weight off the brass worm gears. Doing so will greatly lengthen the life of the worm gears.

Figure 20

2.Turn the worm nut (B, Figure 20) to tilt the head left or right as required. Use the scale on the ram adapter to set the desired angle.

Note: The scales on the ram adapter and for head rotation are guides only. Close tolerance work will require the use of a dial indicator to make sure the head is 90° to the table in the X and Y axis. Please note the table is fitted to be slightly higher in front, usually about 0.0005”.

Be sure to apply torque in two steps using a crossing pattern. Failure to do so could distort the face of the ram adapter.

3.Tighten the four hex nuts. Tighten in two steps using a calibrated torque wrench. Use a crossing pattern to tighten the nuts. Tighten initially to 25 foot-pounds.

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