DIFFERENTIATE BETWEEN CAPSTAN AND TURRET LATHE
TURRET LATHE
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CAPSTAN LATHE
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1. Turret tool head is directly
fitted on the saddle and both of them appear like one unit.
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1. Turret head is mounted on a
slide called ram which is mounted on the saddle
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2. Saddle is moved to provide
feed to the tool.
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2. To provide feed to the tool,
saddle is locked at a particular point and the ram is moved.
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3. It is difficult to move the
saddle for feed.
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3. It is easy to move the ram
for feed.
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4. As the saddle can be moved
along the entire length of the bed, it is suitable for longer workpieces.
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4. As the movement of the ram
is limited, it is suitable for machining shorter workpieces only.
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5. To index the turret tool
head, a clamping lever is released and the turret is rotated manually.
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5. When the handwheel for the
ram is reversed, the turret tool head is indexed automatically.
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6. Limit dogs are used to
control the distance of tool movement.
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6. To control the distance of
tool movement, feed stop screws are provided at the rear side of the turret.
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7. Some turret lathes have the
facility of moving the turret at right angles to the lathe axis.
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7. No such facility.
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8. Heavy
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8. Lighter in construction.
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9. Suitable for machining heavy
and large workpieces.
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9. Only small and light
workpieces are machined.
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10. Machining can be done by
providing more depth of cut and feed.
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10. Only limited amount of feed
and depth of cut are provided for machining.
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REFERRED BY : - ER. DINESH JAIN, A.P.,MECHANICAL ENGG. DEPTT., SGI
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