6. Thread cutting and automatic feed
6.2 Tumbler gear drive
Setting for right thread and longitudinal feed (factory preset)
■ The toothed wheel (4) on the tumbler gear (1) is in contact with the toothed wheel (5) of the main
spindle, thus, when the spindles rotate ant-clockwise (seen from the point of view of the lathe
chuck), the tool skid moves towards the lathe chuck.
Setting for left thread
■ Undo the clamping screw (2)
■ Swivel the tumbler gear (1) to the left so that the toothed wheel (3) comes into contact with the
toothed wheel (5) of the main spindle.
■ With the main spindle in the same direction of rotation, the skid moves away from the lathe chuck
and towards the tailstock.
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