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Fault condition Failure causes and eliminating methods
Diameter is too large, the diameter is too small
  1, the main axis of the position adjustment is too far;
  2, rolling time is too short;
  3, rolling pressure is too low.
Diameter is too large, diameter qualified Blank diameter is too large
Diameter is qualified, outside diameter is too small Blank diameter is too small
Diameter is qualified, outside diameter is too large Blank diameter is too large
Diameter is too small, outside diameter is too large
  1, the center of the spindle is too small;
  2, rolling time is too long;
  3, rolling pressure is too high.
No taper in the middle diameter, outside diameter of taper Blank with taper
Middle diameter taper Two the parallel adjustment of the rolling wheel is not good, so the adjustment should be carried out.