Product Description
TCS-I Series Harmonic Reducer
TCS-I Series Product
Cup-Type Combined (Integrated Cam)The TCS Series Harmonic Reducer Type I connection configuration features a standard cup-type flexspline structure. The input shaft directly fits into the wave generator shaft bore and is connected and positioned via a flat key for transmission with the motor shaft. The typical installation and application method is: wave generator input, circular spline end fixed, and output from the bearing end connected to the flexspline.
TCS-Ⅱ Series Product
Cup-Type Combined (Oldham Coupling Type)The TCS Series Harmonic Reducer Type II connection configuration features a standard cup-type flexspline structure. The input shaft directly fits into the wave generator shaft bore and is connected and positioned via a flat key for transmission with the motor shaft. The wave generator features an Oldham coupling structure, providing automatic concentricity adjustment. The typical installation and application method is: wave generator input, circular spline end fixed, and output from the bearing end connected to the flexspline.
Functional Features
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.
Large Reduction Ratio: The reduction ratio of a single-stage harmonic reducer can reach i = 50–500.
Compact Size and Light Weight.
High Transmission Efficiency and Long Service Life.
Smooth Transmission: Operation is stable, free of impact and noise, with high motion accuracy.
Features of the TCS Series:
1. Simple and compact structure
2. High rigidity
3. High torque
4. Zero backlash
5. Excellent positioning and rotational accuracy
6. Coaxial input and output
Product Views
It primarily consists of three fundamental components:
Circular Spline : A rigid gear with an internal ring gear, analogous to the sun gear in a planetary system.
Flexspline : A flexible gear with an external ring gear, analogous to the planetary gear.
Wave Generator: Analogous to the planetary carrier.
Flexspline
Wave Generator
Circular Spline
Application
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.
Model Description
Harmonic gear reducers can be classified into two main categories based on the shape of the flexspline: Cup Type and Hollow Hat Type. Each category is further divided into Standard and Short Cylinder models based on the length of the flexspline. Each model includes several transmission ratios.
Type Code
The product type code consists of three parts: Flexspline Shape, Flexspline Length, and Torque.
Flexspline Shape is divided into Cup (C) and Hollow Hat (H).
Cup flexspline is denoted by the capital letter C.
Hollow Hat flexspline is denoted by the capital letter H.
Flexspline Length is divided into Standard (S) and Short Cylinder (D).
Standard flexspline is denoted by the capital letter S.
Short Cylinder flexspline is denoted by the capital letter D.
Torque is divided into Standard and High Torque.
High Torque is denoted by the capital letter G; otherwise, it is the standard type.
Structure Code
The structure code of the reducer is divided into two types: Unit (Complete Machine) and Part (Component).
Unit (Complete Machine) is denoted by the capital letter U.
Part (Component) is denoted by the capital letter P.
Connection Methods
Type I: Standard type, where the input shaft fits into the cam's inner bore and is connected via a flat key.
Type II: Oldham coupling type, where the input shaft and the cam are connected using an Oldham coupling.
Type III: Cylindrical hollow type, where the input shaft is connected to the hollow cam via screws.
Type IV: Solid shaft input type.
Type I: Standard type, where the input shaft fits into the cam's inner bore and is connected via a flat key.
Type II: Oldham coupling type, where the input shaft and the cam are connected using an Oldham coupling.
Type III: Cylindrical hollow type, where the input shaft is connected to the hollow cam via screws.
Type IV: Solid shaft input type.
Product parameters
TCS-I Series Performance Parameter Table
Model | GR | TR (2000r/min) | Tmax,start/stop | Tavg,max | Tinst,max | Ninst,max | Navg | Backlash | Weight | Design Life |
Nm | Nm | Nm | Nm | r/min | r/min | Arc_Sec | kg | hour | ||
40 | 50 | 132 | 385 | 186 | 664 | 4000 | 3000 | ≤20 | 4.96 | 12000 |
80 | 198 | 502 | 272 | 962 | ≤10 | 15000 | ||||
100 | 252 | 554 | 360 | 1062 | ||||||
120 | 282 | 602 | 442 | 1162 | ||||||
160 | 282 | 634 | 442 | 1162 | ||||||
45 | 50 | 166 | 482 | 252 | 934 | 4000 | 3000 | ≤20 | 5.55 | 12000 |
80 | 301 | 690 | 378 | 1250 | ≤10 | 15000 | ||||
100 | 341 | 740 | 482 | 1550 | ||||||
120 | 392 | 810 | 610 | 1750 | ||||||
160 | 392 | 865 | 620 | 1890 |
Symbol/Model | 40 | 45 |
ØA h7 | 160 | 180 |
ØB h7 | 110 | 124 |
ØC | 32 | 42 |
ØD | 24 | 25 |
ØE H7 | 32 | 32 |
ØF | 109 | 127 |
ØG | 126 | 147 |
ØH h7 | 127 | 148 |
I | 70.5 | 78 |
J | 66.5 | 74 |
K | 4 | 4 |
L | 16 | 16 |
M | 4.5 | 5.5 |
N | 45.5 | 52 |
O | 6 | 6 |
P | 1.5 | 1 |
Q | 19 | 25 |
R | 5.5 | 10 |
S | 15.5 | 16 |
T | 144 | 164 |
U | 8 | 16 |
Ø V | 9 | 9 |
W | 8 | 16 |
X | M8 | M8 |
Y | 50 | 50 |
Z | 5 | 6 |
a | 4 | 4 |
b | M4 | M5 |
c | 9.3+0.10 | 12.5+0.10 |
Ød H7 | 14 | 19 |
e | 68 | 82 |
f | 8 | 8 |
g | M10 | M12 |
h | 81*2 | 97*2 |
i | 122*2 | 142*2 |
TCS-II Series Performance Parameter Table
Model | GR | TR (2000r/min) | Tmax,start/stop | Tavg,max | Tinst,max | Ninst,max | Navg | Backlash | Weight | Design Life |
Nm | Nm | Nm | Nm | r/min | r/min | Arc_Sec | kg | hour | ||
40 | 50 | 132 | 385 | 186 | 664 | 4000 | 3000 | ≤20 | 5 | 12000 |
80 | 198 | 502 | 272 | 962 | ≤10 | 15000 | ||||
100 | 252 | 554 | 360 | 1062 | ||||||
120 | 282 | 602 | 442 | 1162 | ||||||
160 | 282 | 634 | 442 | 1162 | ||||||
45 | 50 | 166 | 482 | 252 | 934 | 4000 | 3000 | ≤20 | 5.75 | 12000 |
80 | 301 | 690 | 378 | 1250 | ≤10 | 15000 | ||||
100 | 341 | 740 | 482 | 1550 | ||||||
120 | 392 | 810 | 610 | 1750 | ||||||
160 | 392 | 865 | 620 | 1890 |
Symbol/Model | 40 | 45 |
ØA h7 | 160 | 180 |
ØB h7 | 110 | 124 |
ØC | 32 | 32 |
ØD | 24 | 25 |
ØE H7 | 32 | 32 |
ØF | 109 | 127 |
ØG | 126 | 147 |
ØH h7 | 127 | 148 |
| | 72.5 | 79.5 |
J | 66.5 | 74 |
K | 6 | 5.5 |
L | 50.5 | 58 |
M | 16 | 16 |
N | 4 | 4 |
O | 1.5 | 1 |
P | 24 | 27 |
Q | 4.5 | 5.5 |
R | 15.5 | 16 |
S | 35.5 | 39.5 |
T | 27.5 | 28 |
ØU | 144 | 164 |
V | 8 | 16 |
ØW | 9 | 9 |
X | 8 | 16 |
Y | M8 | M8 |
Z | 5 | 6 |
Øa H7 | 14 | 19 |
b | 9.3+0.10 | 12.5+0.10 |
Ø c | 68 | 82 |
d | 8 | 8 |
e | M10 | M12 |
f | 81*2 | 97*2 |
g | 122*2 | 142*2 |
Description of Symbol
Model：Model
GR：Reduction Ratio / Gear Ratio
TR：Rated Torque (at 2000 r/min)
Tmax,start：Maximum Allowable Torque During Start/Stop
Tavg,max：Maximum Allowable Average Load Torque
Tinst,max：Maximum Allowable Instantaneous Torque
ninst,max：Maximum Allowable Instantaneous Input Speed (with Lubricating Oil)
navg：Allowable Average Input Speed (with Lubricating Oil)
Backlash：Backlash
W：Weight
Ldesign：Design Life
1. Rated Torque
The continuous load torque allowed at the output end when the input speed is 2000 r/min.
2. Maximum Allowable Torque During Start/Stop
The maximum allowable torque generated during start/stop that exceeds the normal load.
3. Maximum Allowable Average Load
The average load calculated based on variations in input speed and torque. This average load must not exceed the rated value listed in the table.
4.Maximum Allowable Instantaneous Torque
The maximum allowable torque from unpredictable external impact, beyond the usual load torque and the torque during start/stop.
5.Transmission Accuracy
Under operating conditions, the degree of closeness between the actual rotation angle of the output shaft and the corresponding theoretical rotation angle when the input shaft rotates in a single direction.
6.Design Life
The service life of the reducer when the input speed is 2000 r/min and the output torque is at the rated torque.
Backlash: With both the output end and the reducer housing fixed, a slight angular displacement generated at the input end when a torque of ±2% of the rated torque is applied clockwise and counterclockwise.
Lost Motion: Under operating conditions, the lag in the rotation angle of the output shaft when the input shaft changes from forward to reverse rotation.
Part Numbering Rules
Part Number Explanation for TransRex Harmonic Reducers
TCS Harmonic Reducer Code Explanation | ||||||||||
TCS | 40 | 80 | U | I | *** | |||||
Model | Size | Reduction Ratio | Structure Code | Connection Type | Special Specifications | |||||
TCS T: TransRex C: Cup Flexspline S: Standard Flexspline Length
| 40 | — | 50 | 80 | 100 | 120 | 160 | U：Complete Assembly
| Type I: Standard Type Type II: Oldham Coupling Type
| 1. Z + Shaft Bore Diameter 2. LW: Lightweight Model (e.g., -Z8, -Z14) If a lightweight harmonic reducer is selected, use "LW" to indicate; if blank, it denotes the standard product.
|
45 | — | 50 | 80 | 100 | 120 | 160 | ||||
The product number consists of the type code, size code, reduction ratio, structure code, and connection method.
Quality Assurance
Lubricating Oil Product Name | SK-1A | SK-2 | 4BN0.2 |
Viscosity | 265~295 | 265~295 | 290~320 |
Temperature Resistance & Melting Point | 197Ω | 198Ω | 247Ω |
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
TCS Series Harmonic Reducer Mounting Methods
1.TCS Series Mounting Method - A
2.TCS Series Mounting Method - B
Mounting Precautions
Improper mounting may cause vibration, abnormal noise, or even damage during operation. Please strictly adhere to the following precautions:
Before mounting, ensure the flatness of the mounting plate and check for any protrusions or foreign objects around the screw holes.
During assembly, avoid applying excessive external force to the wave generator bearing area. Gently insert the flexspline by rotating the wave generator to ensure smooth engagement.
When using a coupling structure other than the Oldham coupling type, pay special attention to controlling the geometric accuracy of the mounting position (recommended within 0.01–0.015 mm).
Note:
When the wave generator is mounted facing upward or downward, fill the gap between the wave generator and the flange mounting surface with lubricating grease.
Screw grade | 12.9 |
|
Screw Spec | N.m | |
M3 | 2 | |
M4 | 4.5 | |
M5 | 9 | |
M6 | 15.3 | |
M8 | 37 | |
M10 | 74 |
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.
Service
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.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.Do not exceed the allowable torque during use.
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.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.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.The surface of the combination type product is not treated with anti-rust process.
2.Apply anti-rust agent to the surface if anti-rust treatment is required.
3.In addition, please consult our company if you need our company to perform surface anti-rust treatment.
Company Introduction
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.
