Turret Head Indexing Mechanism
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Turret Head Indexing Mechanism
Turret Head Indexing Mechanism - Turret head indexing mechanism is an arrangement that indexes the turret head automatically when it is brought back away from the spindle nose or chuck after the first operation is completed. That means, automatically the present tool in the turret head will rotate away and the next tool will come in its place for the next operation.
Turret Head Indexing Mechanism
| A - Spring | D - Pin | G - Index Plate |
| B - Cam | E - Turret Spindle | H - Turret |
| C - Pawl | F - Ratchet Wheel | I - Plunger |
As the turret head reaches the backward position that is away from the chuck holding the workpiece, the plunger actuating cam lifts the plunger from the slot S of the index plate and thus unlocks it so that, now, the turret head is free to rotate. As the saddle is still moving, the ratchet wheel comes in contact with the projecting pin of the pawl.
The pin pushes and rotates the ratchet wheel which results in the indexing of turret. When the turret head has reached its extreme right position, ratchet wheel has also been rotated through 60° and the plunger has again set in one of the slots of the index plate.
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