Harmonic Drive Components
Your Professional Harmonic Drive Components Supplier
Jiangsu Zhengfang Dynamics Technology Co., Ltd. is located in Nanjing, and stands as a benchmark enterprise in the field of high-end equipment precision manufacturing.
Our main products include humanoid robot parts, medical components, electronic parts, new energy components, automotive parts, and other high-precision CNC machined parts for complex industrial applications.
-
![Flex Spline]()
Flex Spline
Our Robot Reducer Flexspline is a key core component of harmonic reducers, which achieves high reduction ratio, zero backlash and high-precision transmission through meshing with the circular splineAdd to Inquiry -
![Circular Spline]()
Circular Spline
As the fixed reference of the harmonic transmission system, the internal gear ring meshes with the flexspline to form a high-precision and zero-backlash transmission structure, which is a keyAdd to Inquiry -
![Wave Generator Bearing]()
Wave Generator Bearing
Our Robot Reducer Wave Generator Bearing is a core driving component of harmonic reducers, which drives the elastic deformation of the flexspline through a precision elliptical cam to achieve highAdd to Inquiry -
![Output Bearing]()
Output Bearing
Processed on high-precision CNC lathes from Japan’s Tsugami, it ensures ultra-precise raceways and accurate preload adjustment, which significantly improves positioning accuracy and dynamic stabilityAdd to Inquiry -
![Robot Reducer Hollow Shaft]()
Robot Reducer Hollow Shaft
Our Robot Reducer Hollow Shaft is a core transmission component of robotic reducers, which integrates high torque bearing capacity with an oversized inner bore design to achieve seamless integrationAdd to Inquiry
Why Choose us
Quality Control
We have obtained five major international certifications, including ISO 9001, AS9100, IATF 16949, ISO 45001, and ISO 14001, ensuring full compliance with global standards in quality, environmental management, and occupational health & safety.
Advanced Production Equipment
We are equipped with world-class manufacturing systems, including DMG MORI and GF Mikron 5-axis machining centers, EMAG electrochemical machining equipment, Charmilles EDM machines, Tsugami turn-mill centers, as well as Zeiss CMM and GOM optical inspection systems, ensuring exceptional precision and reliable quality control.
Production Capacity
With an annual output exceeding one million high-precision components, we are capable of efficiently meeting large-scale and complex manufacturing requirements.
Parameter
|
Item |
Parameter |
|
Cam Profile Accuracy |
≤0.005 mm |
|
Bearing Rotation Accuracy |
Inner Ring Runout ≤0.002 mm |
|
Axial Stiffness |
≥500 N/μm |
|
Maximum Operating Speed |
6000 rpm |
|
Vibration Velocity |
≤1.5 mm/s |
Wave Generator Bearing Custom Machining
Made from drawings, 3D models, or samples
Custom cam contact, bearing seat, bore, and mounting structure
Precision fit for flex spline and wave generator reducer systems
Controlled datums and mating surfaces per drawing
Process defined by material, heat treatment, finish, and batch size
Features of Harmonic Drive Components
High reduction ratios in a single stage
With only three components, reduction ratios of 30:1 to 160:1 are achieved in a single stage. In customer-specific solutions, reduction ratios of up to 400:1 have already been realised. The high gear ratio enables the use of small electric motors.
Zero backlash
Due to the permanent preload, harmonic drive components have no backlash in the teeth over their entire lifetime. There is no backlash of the teeth when the load is reversed.
Highest precision
Harmonic drive components have an excellent positioning accuracy of less than one minute of arc and a repeatability of only a few seconds of arc.
Central hollow shaft
Harmonic drive components offer the option of a central hollow shaft. Cables, shafts, laser beams, etc. Can be easily guided through the hollow shaft.
Highest torque capacity and low weight
Since power is transmitted over a large tooth engagement area, harmonic drive components can transmit higher torques than conventional gears. This enables compact dimensions and low weight of the drive system.
Robustness and durability
Harmonic drive components are maintenance free and highly reliable over their entire lifetime. The gear's overload capacity also makes it robust against shock loads.
Types of Harmonic Drive Components for Precision Manufacturing
Wave Generator: An elliptical steel cam wrapped in a thin-section ball bearing. The bearing's outer race deforms with the cam, which lets the wave generator spin freely inside the flexspline while imposing the elliptical shape. The bearing is the consumable element — typical L10 life is 7,000–10,000 hours under rated load.
Flexspline: A thin-walled steel cup with external teeth on the open end and a solid mounting flange on the closed end. Wall thickness is usually 0.5–1.5 mm depending on size, and tooth-form tolerance must hold ±5 µm or tooth engagement gets sloppy at the major axis. Strain at the major axis runs around 0.3% — well below yield, but high enough that fatigue eventually wins.
Circular Spline: A rigid internal ring gear with Nf + 2 teeth. It bolts to the gearbox housing in standard configurations. Tooth profile is a modified involute ground to ±3 µm to match the flexspline at the major axis without binding at the short axis.
Cross-Roller Output Bearing: Most modern strain wave units integrate a cross-roller bearing on the output flange to handle the moment loads from a robot arm or rotary table directly. It eliminates the need for an external bearing and keeps the package short — often under 50 mm axial length for a CSG-25 size.
Flex Spline
The Flexspline is slightly smaller in diameter and has two fewer teeth than the Circular Spline. The elliptical shape of the Wave Generator causes the teeth of the Flexspline to engage the Circular Spline at two opposite regions across the major axis of the ellipse. For every 180 degree clockwise rotation of the Wave Generator the Flexspline teeth are advanced counterclockwise by one tooth in relation to the Circular Spline. Each complete clockwise rotation of the Wave Generator results in the Flexspline moving counter-clockwise by two teeth from its original position relative to the Circular Spline.
Superior Gear Performance Using an S Tooth Design
It has a special curved surface unique to the S tooth profile that allows continuous contact with the tooth profile. It also alleviates the concentration of stress by widening the width of the tooth groove against the gear tooth thickness and enlarging the radius on the bottom. This tooth profile enables up to 30% of the total number of teeth to 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.
Flexible Global Shipping Solutions
We support multiple shipping methods including sea freight, air freight, rail transportation, and express delivery to meet different delivery timelines and project requirements. Professional packaging and export handling ensure safe and efficient transportation for international orders.
FAQ
As one of the most professional harmonic drive components manufacturers and suppliers in China, we're featured by quality products and good price. Please rest assured to buy customized harmonic drive components made in China here from our factory. Contact us for pricelist.
Flex Spline, Robot Reducer Hollow Shaft, Circular Spline