valutazioni - 2, GPA: 3.5
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Facilità d'uso
Example: The desired metric pitch is 1.25 mm. Find this number in the chart and find the number of teeth of the two gears to the left. The F gear will need to have 47 teeth and the G will need 60 teeth. A diagram on the left side of the chart on the machine tells us the 47 tooth gear goes on top of the middle gear and the 60 tooth gear goes on the bottom. Figure 17. Metric thread chart Figure 18. Change gear bracket and gears. -18- G4002/3 Gear Head Lathes 5. Slide the middle gear until it is in mesh with Thread Selection Cont. the G Gear. Tighten the cap screw at the Metric threading requires 5 gear changes to achieve all of the available pitches listed on the chart. Refer to Figure 19 while reading the instructions below. To change gears: 1. Loosen the nut below the middle gear and rotate the bracket so the middle gear moves away from gear F. 2. Loosen the cap screw at the center of the middle gear and slide it away from gear G. 3. Gear F can be removed by loosening the cap screw in its middle. Gear G has a setscrew in its rim. Loosen this screw and pull the gear off of the shaft. 4. Replace these two gears with the gears which will produce the desired pitch and secure with screws provided. center. 6. Pivot the bracket until the middle gear is in mesh with gear F and tighten the nut below. Figure 19. Gear Placement G4002/3 Gear Head Lathes -19 Carriage Controls The carriage handwheel allows the cutting tool to move along the length of the lathe bed. The cross slide allows the cutting tool to travel perpendicular to the bed. The carriage features a top slide which allows linear movement of the cutting tool at any preset angle. This section will review the individual controls on the carriage and provide descriptions of their uses. See Figure 20. Compound Slide Handwheel -The Top Slide Handwheel controls the position of the cutting tool relative to the workpiece. The top slide is adjustable for any angle. The graduated dial is adjustable using the same method as the dial on the cross slide. Angle adjustment is controlled by hex nuts on the base of the top slide. Figure 20. Handwheel locations. Carriage Handwheel Cross Slide Handwheel Compound Slide Handwheel Cross Slide Handwheel -The Cross Slide Handwheel moves the top slide toward and away from the work. Turning the dial clockwise moves the slide toward the workpiece. The graduated dial can be adjusted by holding the handwheel with one hand and turning the dial with the other. Carriage Handwheel -The Longitudinal Handwheel moves the carriage left or right along the bed. The control is helpful when setting up the machine for turning or when manual movement is desired during turning operations. Figure 21. Spindle rotation control lever. Spindle rotation control -The spindle rotation is controlled from the lever on the right hand side of the carriage. Moving the lever down causes the spindle to rotate counter clockwise. Moving the lever up causes the spindle to turn clockwise. The middle position stops the motor and the lever is considered to be in a neutral position. See Figure 21. -20-G4002/3 Gear Head Lathes Tool Post and Holder Tool post -A quick change tool post and 2 tool holders are supplied with the Model G4002/3. Figure 22 shows tool post and a holder with optional bit. Cutting tools can be secured and removed by tightening or loosening the clamping screws in the top of the holder. A threaded stud is mounted in the top of the holder and has a knurled thumb wheel. Rotating the thumb wheel allows for adjustment of the tool holder so the cutting tool can be centered. The handle on the tool post can be rotated to lock and unlock the tool holder onto the dovetail ways. The tool post may be rotated by loosening the nut at the top of the tool post. More styles of tool holders are available through Grizzly Industrial, Inc. Consult the latest catalog for styles, prices and ordering information. Tailstock Controls The tailstock serves many functions. The primary use is for holding centers and drill chucks. The barrel has a Morse taper #3 bore and is imprinted with graduations in millimeters and inches. Please refer to Figure 23. Tailstock Handwheel -Turning the handwheel advances or retracts the barrel in the tailstock. The graduated dial on the handwheel is adjustable. Top Lock Lever -This lever locks the tailstock barrel in place. Side Lock Lever -This lever locks the tailstock in place on the lathe bed. Figure 22. Quick change tool post. Figure 23. Detail of tailstock controls. G4002/3 Gear Head Lathes -21 Test Run Always make sure the power switch is in the “OFF” position and the spindle control lever is in the neutral position before plugging in power cord. Now that the lathe is securely in place and you’ve read the safety guidelines, it’s time to give the machine a test run. Before starting the machine: 1. Make sure the machine is properly grounded, the Power Switch is in the “OFF” position and the spindle control lever is in the neutral position. See Fi...
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