THS Series Harmonic Reducer

The THS Series Harmonic Reducer is a high-performance, precision gear reducer designed for demanding automation and robotics systems. It offers four connection types, a wide range of sizes and reduction ratios , and is engineered to deliver exceptional rigidity, torque capacity, and positioning accuracy. With its coaxial input/output design and large hollow shaft, the BHS reducer simplifies integration and supports applications requiring cable or shaft pass-through.

1. High Load Capacity: In harmonic reducers, tooth engagement is surface contact, and the number of simultaneously engaged teeth (overlap coefficient) is relatively high. This results in low unit area pressure and higher load capacity compared to other transmission forms.

2. Large Reduction Ratio: The reduction ratio of a single-stage harmonic reducer can reach i = 50–500.

3. Compact Size and Light Weight.

4. High Transmission Efficiency and Long Service Life.

5. Smooth Transmission: Operation is stable, free of impact and noise, with high motion accuracy.

It primarily consists of three fundamental components:

1. Circular Spline : A rigid gear with an internal ring gear, analogous to the sun gear in a planetary system.

2. Flexspline : A flexible gear with an external ring gear, analogous to the planetary gear.

3. Wave Generator: Analogous to the planetary carrier.

Thanks to its core features including high precision, zero backlash, compact design, high rigidity, and large hollow shaft, the BHS Series Harmonic Reducer serves as an ideal transmission solution for fields such as aerospace, industrial robotics, inspection and analysis equipment, medical devices, communication equipment, and high‑end processing machinery. Its zero‑backlash transmission and high rotational accuracy meet the stringent positioning requirements of aerospace and inspection systems. The compact coaxial design facilitates integration into the confined spaces of medical and communication devices, while the high torque density and rigid structure support continuous high‑load operation in industrial robots and processing equipment. Furthermore, the hollow‑shaft design enables easy routing of cables and tubes, optimizing overall machine layout and reliability.

Recommended Lubricating Oil

※Combination type products are lubricated with grease, which is pre-added before delivery and no additional injection is required during assembly; simple type products are not filled with grease at the factory and need to be added separately during assembly.

※Do not mix with other types of lubricating grease.

※Improve lubrication life through the following measures: Apply grease to all contact parts thoroughly at the initial stage of operation to completely remove initial wear dust generated during the sealing stage of each contact, and replenish grease to each contact part.

Installation

1.Motor direct connection with wave generator (Type Ⅰ Connection)

2.Motor connection with cross slider coupling (Type Ⅱ Connection)

Incorrect Mounting Direction                                                                                                                                            Correct Mounting Direction

1. 1.Before installation, check that the flatness of the mounting plate is good and that there are no protrusions or foreign objects around the screw holes.

2. 2.Avoid applying excessive external force to the bearing part of the wave generator during assembly. The wave generator can be smoothly inserted into the flexspline by rotating it.

3. 3.When using a coupling structure without a cross slider, pay special attention to controlling the geometric accuracy of the installation position (suggested within 0.01~0.015mm).

   
   

Lock the screws in sequence according to the cross method shown in the picture in the table, then re-tighten them in sequence for reinforcement. The locking torque shall refer to the data in the table.

1. 1.Under the conditions of normal assembly, rated load operation and sufficient lubrication, the warranty period is 15 months or 3000 hours from the date of delivery, whichever comes first.

2. 2.Failures caused by the following circumstances are not covered by the warranty:

   a. Prolonged exposure to air, which affects product use due to dust, humidity, water immersion, etc.;

   b. Modification or disassembly of the product not carried out by our company, and our company shall not be liable for any damage caused thereby;

   c. Failures caused by improper use or violation of usage regulations;

   d. Failures not caused by the quality of the product itself;

   e. Failures caused by natural external forces beyond human control.

Notes

1. 1.Do not exceed the allowable torque during use.

2. 2.Use the product in the following environment:

   Ambient temperature: 0°C ~ +40°C; No corrosive or explosive gas, no metal dust, no splashing water, oil, etc.

3. 3.Seal the product before and after use to prevent dust, moisture and other impurities from entering; store in a cool place and avoid direct sunlight.

4. 4.Do not strike any parts of the product with a hammer or other heavy force; ensure that the product will not be deformed or cracked due to falling during installation and use. If the product is used in a damaged state, its performance cannot be guaranteed and may lead to malfunctions.

1. 1.The surface of the combination type product is not treated with anti-rust process.

2. 2.Apply anti-rust agent to the surface if anti-rust treatment is required.

3. 3.In addition, please consult our company if you need our company to perform surface anti-rust treatment.

Founded in 2015, TransRex specializes in providing precision transmission solutions for industrial applications. Our core products include worm gear reducers, high-precision reducers, planetary gear reducers, robotic reducers, hardened gear reducers (K/F/R/S series), and integrated adjustable/fixed speed gearmotors, along with a wide range of transmission components. We are committed to delivering reliable, efficient, and customized drive systems to meet the evolving needs of global industries.