Harmonic Drive LLC Product

Hollow Shaft Gearing Components

Model: SHF, SHG

Harmonic Drive LLC

Image of Hollow Shaft Gearing Components

Component set, silk hat type gears feature a large hollow through hole and provide exceptional positioning accuracy in a compact design. The flexspline of the silk hat gears features a brim that looks very similar to a silk hat, hence the name. The brim acts as a perfect mounting surface, leaving a large through hole. They are available with reduction ratios 30:1 - 160:1.

  • Zero backlash
  • Hollow bore units available
  • Excellent positioning accuracy
  • Compact and simple design
  • High torque capacity
  • High torsional stiffness
  • Peak torque 9 ~ 1800 N•m
  • Ratios 30:1 ~ 160:1
  • SHG has 30% higher torque rating than SHF series

Consisting of three basic components: flexspline, circular spline and wave generator; component gear sets offer ultimate design flexibility and can be tightly integrated in equipment sub-structures.

This simple three element construction combined with the unique operating principle allows extremely high reduction ratio in a very compact and lightweight package. Neither the size nor weight of the gear vary with the reduction ratio. The high performance attributes of this gearing technology including zero backlash, high torque, compact size, excellent positional accuracy and repeatability are all a direct result of the unique operating principle.

Superior Gear Performance Using an S Tooth Design
Harmonic Drive developed a unique gear tooth profile that optimizes the tooth engagement. This tooth profile (the "S tooth") enables up to 30% of the total number of teeth to be engaged simultaneously. Additionally the large tooth root radius increases the tooth strength compared with an involute tooth. This technological innovation results in high torque, high torsional stiffness, long life and smooth rotation.

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