Title:
HIGH-PRECISION MACHINING REAMER AND FINISHING METHOD FOR SPINDLE HOLE USING THE SAME
Document Type and Number:
Japanese Patent JP2002200523
Kind Code:
A
Abstract:
To provide a reamer that can finish a spindle hole cut, for example, in an aluminum baseplate for a hard disk drive(HDD) spindle motor to severe requisite precision by suppressing workpiece deflection and contraction of the diameter of the hole due to elastic reversion after machining.
A cutting edge tip 4 is brazed to the peripheral point of a cylindrical shank 2. The chamfer angle λ of a cutting edge 5 formed in the tip is set at 90°, and the back taper of a cutting part 6 is set at 0 to 0.015 mm/100.
Inventors:
UEDA SHOJI
MARUYAMA KATSUYOSHI
MARUYAMA KATSUYOSHI
Application Number:
JP2000401924A
Publication Date:
July 16, 2002
Filing Date:
December 28, 2000
Export Citation:
Assignee:
SUMITOMO ELECTRIC INDUSTRIES
International Classes:
B23D77/00; (IPC1-7): B23D77/00
Attorney, Agent or Firm:
Bunji Kamata (2 outside)
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