Strain Wave (harmonic) gear units and component sets

WP_SeriesWP Series variants, FLEXWAVE product family

Achieving new heights in compact, zero backlash gear technology. NIDEC-SHIMPO has had a long and storied history supplying the leading robotics and machine tool manufacturers in Japan. Our loyal customers within these industries strongly urged us to develop our own strain wave gear technology, and leverage our primary competencies – modularity and flexibility of the core design and consistent production in mass volume – to help them become more competitive in the global marketplace. After extensive effort to refine harmonic gear technology and to manufacture at a level that exceeds our customers’ expectations, NIDEC-SHIMPO is proud to introduce our new FLEXWAVE product line.

The NIDEC-SHIMPO FLEXWAVE is a very compact harmonic gear reduction mechanism that achieves zero backlash, as well as exceptional accuracy and repeatability. The FLEXWAVE consists of three major internal elements – the elliptical wave generator, the flexspline, and the circular spline. The elasticity properties of the flexspline and the teeth differential between the flexspline and the circular spline result in the unique reduction characteristics. When compared to other reduction technologies, the FLEXWAVE offers the following advantages:

  • Zero backlash
  • High efficiency ratings
  • High reduction ratios in a compact footprint
  • Exceptional repeatability and positional accuracy
  • Light weight with superior torque density

These characteristics enable the FLEXWAVE to be the superior choice when sizing and selecting the proper reduction technology for ROBOTICS, MEDICAL EQUIPMENT, SEMICONDUCTORand CIRCUIT MANUFACTURING, MACHINE TOOLS or any ASSEMBLY AUTOMATION applications requiring fine positioning.

 

Flexwave Harmonic Gear Technology: Operating Principles | Structural Overview | FLEXWAVE Brochure

 

WP Series, Summary Level Table

Product Series Frame Size Reduction Ratios Torque Output Housing Style
WPC
Component sub-assembly
WPC_S Smallest: 35mm
Largest: 80mm
Variety: 5
Minimum: 50:1
Maximum: 120:1
Variety: 4
23Nm ~ 346Nm Closed
WPS
Simple contained assembly
WPS_S Smallest: 35mm
Largest: 80mm
Variety: 5
Minimum: 50:1
Maximum: 120:1
Variety: 4
23Nm ~ 346Nm Open
WPU
Complete unit assembly
WPU_S Smallest: 35mm
Largest: 80mm
Variety: 5
Minimum: 50:1
Maximum: 120:1
Variety: 4
23Nm ~ 346Nm Closed
Open (input shaft)
Open (input shaft)