Air Spindle

SPM28 (Crash-proof) Type

Accurate rotation air spindles for HDD disk test equipments and other devices

SPM28 Type


  • Crash-proof
  • Small, light and compatible with high-speed rotation
  • Cleanness: Class 10 (0.1μm)
  • Vacuum suction mechanism at the center of the bearing for holding a disk or other workspiece


SPM28 Type Dimensions


Type SPM28
Air supply pressure 0.4MPa(G)
Maximum rotation speed 20,000 r/min
Rotation speed change*1 0.001% and below
(Encoder Z phase jitter)
Non-repeatable run-out
(NRRO) accuracy
Radial 0.005μm (0.2μinch) and below
Axial 0.005μm (0.2μinch) and below
Repeatable run-out
(TIR) accuracy
Radial 2μm (78.7μinch) and below
Axial 1μm (39.4μinch) and below
Rigidity Radial 9.5N/μm (0.054lb/μinch) and above
Axial 33N/μm (0.192lb/μinch) and above
Load capacity Radial 30N (6.74lb) and above
Axial 100N (22.5lb) and above
Air mass consumption 6Nl/min (0.21scfm) and below
Motor capacity 50W at 15,000 r/min
Cleanness Class 10 (0.1μm)
Unbalance force 0.05gmm and below
Mass 2.0Kg (4.41lb)
  • Achieved when the air spindle is used with ShinMaywa's non-switching driver NS20-A.
  • Specifications and dimensions are subject to change without notice.

Catalog Download

Air Spindle SPM28 Type[PDF/364KB]


ShinMaywa Industries, Ltd.
Automatic Machinery Group, Wire Processing Systems Department
1-1 Shinmeiwa-cho, Takarazuka-shi, Hyogo 665-0052  Japan
Phone: +81-798-54-1834