Thread Selection Cont.
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.
5.Slide the middle gear until it is in mesh with the G Gear. Tighten the cap screw at the 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 |