Harbor Freight Tools 4019 Assembly and Operating Instructions, Capacity UP to

10.The Lathe Spindle (part #23) turning speed is adjustable and allows the operator to run the Spindle speed at either 130 RPM, 200 RPM, 350 RPM, 560 RPM,

920 RPM, 1,500 RPM, 2,450 RPM, AND 4,000 RPM. The correct speed de- pends on the diameter and hardness of the workpiece. The larger the workpiece, the slower the speed. The harder the workpiece, the slower the speed.

(See Figure F.)

ASSEMBLY AND OPERATING INSTRUCTIONS

To Assemble The 3-Jaw Chuck For A Workpiece Up To 1” Diameter:

1.Workpieces with a diameter of up to 1” should be gripped with the internal jaws of the 3-Jaw Chuck (part #67). (See Figure D.)

2.If necessary, reverse the jaws for internal gripping. To do so, unscrew, remove, and clean each of the three jaws. Turn the knurled tension ring until the begin- ning of the spiral thread comes to the respective groove. (See Figure D.)

3.The jaws are then inserted in the following order: (See Figure D.)

A.Jaw #1 is inserted in reverse in groove #1, then rotate the tension ring.

B.Jaw #2 is inserted in reverse in groove #2, then rotate the tension ring.

C.Jaw #3 is inserted in reverse in groove #3, then rotate the tension ring.

JAW 3

3

1

1

2 2

JAWJAW

FIGURE D

3-JAW CHUCK

PIN(#67)

CAPACITY

UP TO

1”

PIN

WORKPIECE

4.Once the three jaws are securely attached to the 3-Jaw Chuck (part #67), center the end of the workpiece within the three jaws. Insert the two Pins (included) in the 3-Jaw Chuck, and securely tighten the jaws onto the workpiece.

CAUTION: Make sure to remove the two Pins from the 3-Jaw Chuck once the jaws have been tightened.

(See Figure D.)

SKU 04019 PAGE 8