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| 1. |
Premature failure
of thrust bearing: Excessive
axial load causes
premature failure of thrust ball bearing provided
inside CENTRE. Use adequate hydraulic pressure or manual force
to press
Live Centre on centre hole of component. It should be just enough
to prevent slippage between component and
Bullet.
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2. |
Vibration and chatter marks
on components:
Ensure direct fitting of taper shank
of Live Centre into taper hole of tail-stock. Use of
reduction socket may cause vibrations and chatter mark on
components.
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3. |
Fast wear of Bullet
Tip:
Never apply grease to centre hole of
component when you want to support it with Live Centre.
Ensure adequate axial force to prevent slippage.
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4. |
Run-out more than
specified : |
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Either because
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b.
Reground Bullet is being used. |
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c.
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Run-out is
checked at wrong portion. If it is checked on portion of Bullet other than
its 60 degrees
cone, like cylindrical portion
or 15 degrees relief portion, it may be noticed to be more. Always
check on 60 degrees cone.
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5. |
DO
NOT lubricate CENTRE using any
oil or grease. |
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6. |
DO
NOT hold housing in bench
vice by mistake while replacing BULLET.
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