Wanheshun Technology Co., Ltd. | Precision Harmonic Reducers Manufacturer
Precision Motion · Global Supply

Precision Harmonic Drives Manufacturer

Zero backlash, high reduction ratios, compact design. We deliver core transmission components for robots and precision equipment to 60+ countries.

Get a Quote Explore Products
ISO 9001 Certified
CE Compliant
RoHS & REACH
R&D Center
Global Shipping
Product Series

Product Series

From standard to precision-grade harmonic drive solutions

HCS Standard Cup-Type Harmonic Reducer
Cup-Type

HCS Standard Cup-Type Harmonic Reducer

6 model codes · frame 14 / 17 / 20 / 25 / 32 / 40

The flexspline adopts a cup-type standard cylindrical structure with compact size; the input shaft mates directly with the wave generator bore and connects via a flat key, typically with the circular spline fixed and the flexspline as output. Highly meshed and lightweight. The HCS harmonic reducer features high transmission accuracy, low noise, fast response and excellent reliability. Because multiple teeth engage simultaneously at two symmetric 180° positions, pitch and cumulative pitch errors average out, yielding very high positional and rotational accuracy.

  • Model Range: WHS-HCS-14 ~ WHS-HCS-40
  • Structure: Standard cup
  • Mounting Holes: 6 / 8 / 10 / 16 hole groups
  • Reduction Ratio: 50 : 1 – 160 : 1 (custom)
Learn more →
HYT Integrated Harmonic Actuator
Integrated

HYT Integrated Harmonic Actuator

23 model codes · frame 14 / 17 / 20 / 25 / 32 / 40

The HYT-I series is a miniaturized product developed to meet market needs. Its flexspline is a hollow-flange standard cylindrical structure; the whole unit is compact and integrates the bearing flange internally, allowing the motor to be mounted directly and used immediately. Compared with the HCS series of the same torque capacity, HYT is more compact with a thin-wall structure, pursuing smaller size without changing performance. The HYT-I harmonic reducer offers high precision, high efficiency and high rigidity, with compact structure and light weight — ideal for space-constrained applications.

  • Model Range: WHS-HYT-14 ~ WHS-HYT-40
  • Structure: Integrated actuator (flange + output plate)
  • Reduction Ratio: 30 / 50 / 80 / 100
  • Ratio Code: U-I
Learn more →
HCD Ultra-Short Cup Harmonic Reducer
Cup-Type

HCD Ultra-Short Cup Harmonic Reducer

4 model codes · frame 14 / 17 / 20 / 32

The HCD series is a miniaturized product developed to meet market needs. Compared with the HCS series of the same torque capacity, HCD is more compact with a thin-wall structure, pursuing smaller size without changing performance and pushing "small but beautiful" to the limit. In this harmonic reducer, the wave generator (usually a cam combined with a flexible bearing) is inserted into the flexspline, forcing it into an elliptical elastic deformation. The long axis fully meshes with the circular spline tooth space while the short axis fully disengages. As the wave generator rotates continuously, the flexspline deforms repeatedly through engage/disengage cycles, transmitting motion and reducing speed.

  • Model Range: WHS-HCD-14 ~ WHS-HCD-32
  • Structure: Ultra-short cup (with keyway)
  • Reduction Ratio: 50 : 1 – 160 : 1 (custom)
  • Keyway: With keyway
Learn more →
HST Standard Hat-Type Harmonic Reducer
Hat-Type

HST Standard Hat-Type Harmonic Reducer

17 model codes · frame 14 / 17 / 20 / 25 / 32 / 40

The HST-I series flexspline is a hollow-flange standard cylindrical structure; the whole unit is compact, the input shaft mates directly with the wave generator bore and connects via a flat key. It can be configured either with the circular spline fixed and flexspline as output, or vice versa. The HST-I harmonic reducer offers high precision, high efficiency and high rigidity, with compact structure and light weight — well suited to space-constrained applications.

  • Model Range: WHS-HST-14 ~ WHS-HST-40
  • Structure: Standard hat
  • Variants: U-I simple / U-III vacuum / U-IV solid shaft
  • Reduction Ratio: 50 : 1 – 160 : 1 (custom)
Learn more →
HSD Ultra-Short Hat-Type Harmonic Reducer
Hat-Type

HSD Ultra-Short Hat-Type Harmonic Reducer

3 model codes · frame 14 / 17 / 20

The HSD series is an ultra-short hat-type product developed from the HST platform. Its flexspline uses a hollow-flange structure; the unit is shorter axially and more compact, with an internal support bearing and fully sealed construction for easy installation. The HSD harmonic reducer offers high precision, high rigidity and light weight — ideal for axial space-constrained, weight-sensitive applications.

  • Model Range: WHS-HSD-14 ~ WHS-HSD-20
  • Structure: Ultra-short hat (simple + keyway)
  • Reduction Ratio: 50 : 1 – 160 : 1 (custom)
  • Keyway: With keyway
Learn more →
Catalogue

Full Model Range — 53 codes

Every orderable WHS model code in the 2025 catalogue: HCS, HCD, HYT, HST and HSD across frame sizes 14–40.

Browse all models →
About Us

About Us

Hebei Wanheshun Technology Co., Ltd. is a technology-driven manufacturer specializing in the research, production and sales of high-precision harmonic drive gear reducers. Built around core harmonic transmission technology, we operate a complete in-house chain covering component machining, heat treatment, precision assembly and final inspection, backed by a full-process quality management system. Our product range covers the Standard Cup (HCS), Ultra-Short Cup (HCD), Integrated Unit (HYT), Standard Hat-Type (HST) and Super-Short Hat-Type (HSD) series, with reduction ratios from 30:1 to 160:1. They are widely applied in industrial robots, collaborative robots, CNC machine tools, semiconductor equipment and automated production lines. We serve our customers with consistent accuracy, dependable service life and competitive lead times, supplying both the domestic market and overseas buyers. Custom drawings and samples are welcome — we provide one-stop support from model selection to volume supply.

5Product Series
30:1 - 160:1Reduction Ratios
Manufacturing Strength

Manufacturing Strength

In-house precision manufacturing with full-process quality control

500K+Annual Output (units)
60+Countries Exported
ISO 9001Quality Certified
15+Years of R&D
72hSample Lead Time
99.2%Yield Rate
Applications

Applications

Key industries powered by harmonic drives

Automation Equipment

Automation equipment relies on reducers to convert high-speed, low-torque motor output into slow, high-torque motion. A precision harmonic reducer delivers zero backlash and high repeatability, so pick-and-place units, indexing tables and assembly lines hit the same position every cycle — improving throughput, yield and uptime.

Metal Machine Tools

In metal-cutting machine tools, reducers are integrated into rotary tables, tool changers and feed axes. Harmonic reducers provide the high torsional stiffness and positioning accuracy needed for rigid, chatter-free machining, while their compact hollow design simplifies integration into space-tight machine structures.

Industrial Robots

Industrial robots are multi-joint manipulators whose every axis demands compact, precise and repeatable motion. Harmonic reducers are the standard choice for robot joints because they combine zero backlash, high torque density and a hollow bore for cable routing — enabling smooth, accurate path control across all six axes.

Medical Devices

Medical devices demand smooth, precise and quiet motion with a high safety margin. High-precision harmonic reducers deliver low backlash, low noise and reliable positioning, making them well suited to surgical-assist robots, imaging positioning systems and laboratory automation where accuracy and safety are critical.

Knowledge & Insights

Technical Knowledge

Technical articles on the working principle, selection and structure of harmonic reducers.

Technical article

How Harmonic (Strain Wave) Gears Work

The three core parts — wave generator, flexspline and circular spline — and how elastic deformation produces precise, backlash-free motion.

Read article →
Technical article

How to Select the Right Harmonic Reducer

Torque, reduction ratio, backlash, size and mounting — the five parameters that decide which model fits your machine.

Read article →
Technical article

Reduction Ratio & Backlash, Explained

Two specs buyers see on every datasheet but often misread — what they really mean for speed, torque and accuracy.

Read article →
Technical article

Cup vs Hat vs Integrated: Choosing a Structure

The flexspline shape defines how the reducer mounts and where it fits — a quick guide to the three main structural families.

Read article →
View All Articles
FAQ

Frequently Asked Questions

Answers to the questions buyers ask us most.

What is your minimum order quantity (MOQ)?

We support both prototype/small-batch and volume orders. Tell us your target quantity and application and we will confirm the most suitable arrangement.

Can you provide custom / OEM / ODM designs?

Yes. We support custom bore sizes, flange interfaces, ratios and integration requirements. Share your drawings or specifications and our engineering team will evaluate feasibility and propose a solution.

Do you offer selection support and CAD models?

Yes. We provide free technical consultation, selection guidance, datasheets and CAD models to help you integrate the reducer into your design. Contact us with your load, ratio and mounting requirements.

What is the typical lead time?

Lead time depends on the model, quantity and any customization. Standard models are generally faster than custom builds. Share your requirement and we will confirm a realistic schedule.

Can I get a sample before a bulk order?

Yes, samples can usually be arranged for evaluation and fit-checking before you commit to volume production. Contact us to discuss the model you want to test.

What warranty and after-sales support do you provide?

Every reducer is inspected before shipment and backed by our quality-management process. For any issue after delivery, our team provides responsive technical support and after-sales service — contact us and we will work to resolve it quickly.

Need a Custom Harmonic Drive Solution?

Our engineering team provides selection and technical support.

Contact Us
Request a Quote

Request a Quote

Tell us your requirements — we reply within 24 hours

  • Free technical consultation
  • CAD models & datasheets provided
  • OEM & ODM support
This field is required
This field is required
Please enter a valid email
This field is required
This field is required