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Manafacture: Harbor Freight Tools File size: 2.01 mb File name: Language of manual:

SetscrewChuck 4. Loosen the setscrew, and use the provided Chuck removal wrenches to remove the Chuck. Use one tool to hold the spindle in place and the other to rotate the Chuck counterclockwise. The Live Center The Live Center supports stock that 1. is too long to be supported by the chuck alone. Stock protruding more than three times its diameter should also be supported by the live center. When using a Live Center, the tail stock barrel should protrude about 1/2’’ and not more than 3’’. To remove the Live Center, back the 2. tailstock barrel all the way into the casting. The Live Center will pop out; catch it when it comes out to avoid damaging it. Steady Rest The steady rest supports long, small 1. diameter stock that otherwise could not be turned. The steady rest can also replace the tailstock to allow for cutting tool access at the outboard end of the workpiece. To mount the Steady Rest, secure the 2. bedway from below with the locking plate, and use setscrews to secure it in place. Follow Rest The follow rest is used with small 1. diameter stock to prevent the workpiece from ‘’springing’’ under pressure from the turning tool. The follow rest is secured to the 2. saddle with two cap screws. Spindle Speeds The rotation speed of the headstock 1. is controlled by the position of the belts on the pulleys. The cover on the end of the headstock must be removed to access them. Refer to the following chart (or the plate on the headstock) to determine which belt combinations produce what speeds. The speed settings on this machine are 120, 320, 420, 620, 1130 and 2200 RPM. See photograph, chart and diagram below. ABCIdle Pulley Speed 120 320 420 620 1130 2200 Settings BC1 BC2 AC1 BC3 AC2 AC3 CBA123 The Belt Tension Lever on the top 2. of the headstock, loosens the drive belt to allow the operator to change speeds and can be used like a clutch during operation. See photograph below. Direction SwitchBelt Tension Lever Do not change the Direction Switch rotation while running Lathe. Feed Rate 1. The Feed Rate Lever (above) changes the number of threads-per-inch (TPI) that can be cut. The plate on the machine and the following charts list typical settings. 408040127acbFeed rate portion of machine plate Lever 9 1 9 1 1 a 28 28 28 28 45 b 80 80 60 60 60 c 80 80 120 120 120 Feed 0.0023 0.004 0.005 0.008 0.013 During metric thread cutting the half 2. nut must remain engaged through entire threading process. The thread dial cannot be utilized. 408040120a80bThreading rate portion of machine plate for Inches Lever a Lever b 1 2 3 4 5 6 7 8 9 60 30 8 9 9.5 10 11 11.5 12 13 14 30 30 16 18 19 20 22 23 24 26 28 30 60 32 36 38 40 44 46 48 52 56 408040127a120bThreading rate portion of machine plate for Millimeters Lever 7 1 1 4 7 1 1 1 7 1 1 a 30 28 30 30 30 30 30 42 60 60 60 b 60 60 60 45 30 36 30 36 30 36 30 0.5 0.7 0.75 0.8 1 1.25 1.5 1.75 2 2.5 3 General Operating Instructions Every ten hours of operation, lubricate the lathe’s gears and ways with white lithium grease, as directed in the Maintenance Section of this manual. The Lathe can perform a wide variety 1. of operations; the purchase of reference materials, such as books about machining or engineering tables, is highly recommended. If Lathe use requires a higher de2. gree of accuracy than supplied by the standard set-up, have the Lathe serviced by a qualified machinist. Settings for the spindle, chuck, gibs, 3. ways, and ends, will be determined by the length of the stock and the intended operation. Turn the chuck by hand to make sure 4. it rotates smoothly. Plug the Lathe into a standard, 5. grounded 120V electrical outlet. General Milling Guidelines When performing any operation with 1. the Lathe it is best to proceed slowly and make several passes. A 1000th of an inch of movement 2. yields a 2000th inch cut. Use of a high-quality cutting fluid (not 3. included) will greatly aid in most milling processes. Facing Operations Facing is the process of removing metal from the end of a workpiece to produce a flat surface. To safely perform a facing operation 1. the jaws of the chuck must be as close as possible to the end of the workpiece. The workpiece should not extend more than 2 or 3 times its diameter from the chuck jaws unless the steady rest is used to support the end of the workpiece. Softer metals require higher cutting 2. speeds. Consult a machining manual to determine the rotation speed that must be set to cut the metal. The tumbler gear lever must be in the 3. neutral position so that the leadscrew does not rotate. Clamp the half nut on the leadscrew 4. to keep the saddle from being forced back from the workpiece during cutting. To center the workpiece; close the 5. chuck until the jaws touch its surface, twist the workpiece to seat it; then tighten the jaws. Tighten the jaws from all three chuck key positions to ensure even gripping by the jaws. Clamp the cutting tool in the tool post 6. and turn the toolpost so that the tip of the cutting tool will meet the...

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