Évaluations - 3, GPA: 4.7
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Facilité d'utilisation
See Figure 27. 2. Open the sliding fingers by turning the knurled screws until they fit around the workpiece. Secure the steady rest in position. 3. Tighten the knurled screws so that the fingers are snug, but not tight against the workpiece. Tighten the setscrews and the lock nuts. 4. Lubricate the brass points with machine oil. The Follow Rest is setup in the same manner except that the place of the third finger is taken up by the tool bit. The follow rest prevents long, small diameter pieces from flexing under the cutting pressure from the tool bit. Lock Nuts Figure 27. Steady rest lock nuts. -24- G4002/3 Gear Head Lathes Tailstock The tailstock on the Model G4002/3 is aligned at the factory with the headstock. It is recommended that you take the time to ensure that the tail- stock is aligned to your own desired tolerances. To align the tailstock: 1. Center drill a 6'' long piece of bar stock on both ends. Set it aside for use in step 4. 2. Make a dead center by turning a shoulder to make a shank. Flip the piece over in the chuck and turn a 60° point. See Figure 28. As long as it remains in the chuck, the point of your center will be accurate to your spindle’s axis. Keep in mind that the point will have to be refinished whenever it is removed and returned to the chuck. Figure 28. Finished dead center. 3. Place the live center in your tailstock. 4. Attach a lathe dog to the bar stock and mount it between the centers. See Figure 29. 5. Turn approximately .010" off the diameter. Figure 29. Bar stock mounted on centers. TIP Before making adjustments to the tailstock, mount a dial indicator so that the dial’s plunger is on the tailstock barrel. See Figure 30. Viewed from above. Figure 30. Adjusting for headstock end taper. 6. Measure the stock with a micrometer. If the stock is fat at the tailstock end, the tailstock needs to be moved toward you the amount of the taper. See Figure 30. G4002/3 Gear Head Lathes -25 If the stock is thinner at the tailstock end, the tailstock needs to be moved away from the operator by at least the amount of the taper. See Figure 31. Figure 31. Adjusting for tailstock end taper. 7. Loosen the tailstock mounting bolt. Adjust the tailstock offset by the amount of the taper by turning the adjustment setscrews. See Figure 32. Turn another .010'' off of the stock and check for taper. Repeat as necessary until the desired amount of accuracy is achieved. NOTICE Do Not forget to lock down the tailstock after each adjustment. Adjustment Screw Lock Screw Figure 32. Tailstock offset adjustment screw. -26- G4002/3 Gear Head Lathes SECTION 7: MAINTENANCE ALWAYS disconnect the electric power to the machine before servicing. NEVER lubricate your lathe while it is running. Lubrication Your Model G4002/3 will function best when it is clean and well lubricated. Take the time to wipe down and oil the machine after use. We recommend using ISO 68 or SAE 20W non-detergent oil unless otherwise specified. Apron - Apply lubrication to the apron through the 2 ball fittings on the top face of the apron and one near the apron handwheel. See Figure 33. There is a level glass on the front of the apron and a fill plug on top. Make sure the oil level is between the 2 red marks on the glass before using lathe. Figure 34. External gears and port. External Gearing -Apply only a minimal amount of oil to the teeth of the end gears. Avoid getting oil on the belt or pulleys when lubricating. Apply one squirt of oil into the port shown in Figure 34. Oil Ports Figure 33. Viewed from behind for clarity. Cross-Slide and Compound -These slides are also supplied with ball fittings in their top surfaces and should be oiled the same as the apron. See Figure 33. Figure 35. Gearbox lubrication points. Quick Change Gearbox -Lubrication for the Gearbox is provided through 3 oil points, labeled oil nipple. Add a squirt or two of oil after every three-to-four hours of use. See Figure 35. Motor -The bearings used in the motor are shielded and lubricated for life. G4002/3 Gear Head Lathes -27 Slides and Ways -Apply oil to the ways and slides after each use. Wipe the ways with a clean rag prior to lubrication to ensure that no grime is carried along with your lubricant into friction-sensitive areas. Applying oil to the bedways and other bare metal parts also protect the lathe from rust and pitting. Lead Screw and Feed Rod -Be sure to clean and lubricate the leadscrew, feed rod and switch control rod. The lead screw and feed rod have a bearing on the tail stock end support that will require one to two squirts of oil. See Figure 36. Headstock Gearbox -The oil in the headstock should be changed after the first 2 hours of use. Then, every 6 months, depending on usage. It is recommended that a light weight, non detergent oil be used. Viscosity can range from 10W to 30W and may include multi-viscosity oil in this same range. Figure 36. Lead screw, feed rod and switch rod. Switch Control Rod Feed Rod Oil Ports Lead Screw Tailstock -The tails...
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