15-11-2012, 10:59 AM
Back Gear Mechanism
Back Gear Mechanism.pptx (Size: 115.42 KB / Downloads: 112)
.For winder range & higher reduction of spindle speed, back gear mechanism is used.
.back gear mechanism is an additional part of the belt drive lathe. It is used to obtain slower & wider range of spindel speed
.back gear disengagement & engagement is shown in fig .back gear are located on the back of cone pulley in the fig.
All Geared Drive Headstock
This is the most simple & very common arrangement to obtain multiple speed of the spindle to obtain various speed a set of gear is made to slide on a splinted shaft bringing them into mesh only one at a time with a cluster of gears mounted on a second shaft.
Modern lathes are equipped with both sliding gear & clutch mechanism.