5. SPINDLE HEALTH CHECK UP
• SPINDLE HEALTH CHECK UP: A TOOL
TO KEEP AN EYE ON SPINDLE
CONDITION AND IN TURN MACHINE
ACCURACY
6. PARAMETERS WHICH AFFECT SPINDLE
HEALTH
• BLUE MATCHING OF SPINDLE TAPER
• GO-NO GO OF SPINDLE TAPER
• BORE RUN OUT
• MANDREL RUN OUT NEAR SPINDLE
FACE AND 300 MM/350 MM
• RADIAL PLAY/AXIAL PLAY
• CLAMPING FORCE
• VIBRATION
• OVERALL FUNCTIONING OF SPINDLE
7. BLUE MATCHING
• APPLY A BAND OF
BLUE OF 15 MM
WIDTH AT 120º
• INSERT GAUGE IN
SPINDLE TAPER
• ROTATE SLOWLY
AND CHECK SPREAD
OF BLUE ON GAUGE
• BEST RESULTS >90%
• IF LESS THAN 70%
IMMEDIATE REPAIRS
8. BORE RUN OUT
* BORE RUN OUT
SHOULD BE
LESS THAN 5 µ
• BORE RUN OUT IS TO BE
CHECKED IN SPINDLE
TAPER.
• USE 1 OR 2 µ PEACOCK
DIAL
• PLACE DIAL STAND
EITHER ON SPINDLE
HOUSING OR ON
PALLET TABLE.
9. MANDREL RUN OUT
• PLACE MANDREL IN
SPINDLE TAPER.
• CHECK THE RUN
OUT NEAR TO
SPINDLE FACE AND
300 MM AWAY FROM
SPINDLE FACE
• NEAR SPINDLE FACE
SHOULD BE LESS
THAN 5 µ AND AT 300
MM SHOULD BE
LESS THAN 20µ
10. RADIAL AND AXIAL PLAY
• SPINDLE SHOULD BE RIGID RADIALLY
AND AXIALLY
• THIS CAN BE CHECKED BY APPLYING
HAND FORCE ON MANDREL.
11. CLAMPING FORCE
• PLACE THE CLAMP FORCE METER IN SIDE
SPINDLE TAPER USING APPROPRIATE ADAPTER
• COMAPRE THE READING WITH CLAMP FORCE
GIVEN IN MACHINE MANUAL
12. VIBRATION
• MONITOR VIBRATION LEVEL
PERIODICALLY OF SPINDLE AND
EXTERNAL SOURCE AS WELL
• BEST ACCEPTABLE LEVEL <2.25
MM/SEC
13. OVER ALL FUNCTIONING OF
SPINDLE
• CHEECK OVERALL FUNCTIONING OF
SPINDLE LIKE NOISE, TEMPERATURE,
PROPER COOLING ETC
