CSF CSG PDF - Harmonic Drive LLC

Ordering InformationModelCustomized Specification (special)Size 2A - Component Set such as shape and performance2UH - Housed Unit SetModel NameIndicates short cup designHarmonic Drive® gearingGear RatioGR = Specificationfor ComponentCSF: Standard versionCSG: High torque versionHarmonic Drive® Gear RevolutionHarmonic Drive® precision gear continues to evolve by improving performance and functionality.SSeriesBy pursuingstrength andstiffness, a newCSFCSG SeriesThe CSG achieved a 30% increasein torque capacity. Life (L10) wasincreased from 7,000 hrs to 10,000 hrs.The CSF achievedtooth profilea reduction inwas invented.axial length ofThe “S” tooth Series approximately 50% Ratio 30:1 was added fordoubled thehigher output speeds.torque, lifeand stiffness.Ratio 30:1Miniature SeriesMiniature series was developed to expandthe range of Harmonic Drive® gearing.Tooth ProfilesThe Harmonic Drive® CSF/CSG component sets and housed unitspresented in this catalog incorporate the “S” gear tooth profile. Thispatented tooth profile provides a significant improvement in gear operatingcharacteristics and performance.The new “S” tooth profile significantly increases the region of toothengagement. For the traditional tooth profile 15% of the total numberof teeth are in contact, while for the new profile up to 30% of the teethare in contact. The increased number of teeth in engagement results ina 100% increase in torsional stiffness in the low & mid torque ranges.The new tooth profile also features an enlarged tooth root radius,which results in a higher allowable stress and a corresponding increasein torque capacity. Furthermore, the enlarged region of tooth engagementleads to a more even loading of the Wave Generator bearing,resulting in more than double the life expectancy for the gear.Initial EngagementFull Engagement4