Product Description
CSF-mini Series Precision Harmonic Reducer
The CSF Series represents the most compact and user-friendly combination type products. The main bearing employs our independently developed “compact 4-point contact ball bearing,” enabling direct support of external loads.
The CSF Series comprises two types: the motor-mount type (2XH) and the shaft-input type (1U) supporting input configurations such as belts, gears, and couplings. Please select the most suitable model based on your mechanical device's design requirements.
CSF - 05 - XXX - 2XH - A
Model Type Reduction Ratio Form
1U-U
03 30 1U-C
05 50 1U-D
CSF 08 80 1U-E
11 100 2XH-A
2XH-B
Note: The CSF series is categorized into 4 types based on model and 6 variants based on configuration, offering extensive customization options. Please refer to the above symbols when placing orders.
Functional Features
Ultra-Precision with Zero Backlash
Featuring exceptionally low backlash (≤10-20 arcsec), this product achieves near-zero backlash transmission. It maintains sub-arcsecond positioning accuracy and repeatability even under high-speed start/stop and frequent reversing conditions, making it the ideal choice for high-precision motion control.
Ultra-Compact Design with High Torque Density
The product diagram reveals an exceptionally compact structure and small footprint, while the specifications demonstrate its ability to deliver substantial torque within a minimal volume. This high torque density enables seamless integration into space-constrained precision equipment, achieving “small size, big torque.”
High Dynamic Response and Smooth Operation
With a maximum allowable input speed of 10,000 r/min and extremely low rotational inertia, this series delivers exceptional dynamic response capabilities. Simultaneously, the harmonic drive principle ensures minimal vibration and noise even at high speeds, guaranteeing smooth and fluid motion.
Structure and Types of the CSF Series
Shaft Input Type
Features a complete input shaft assembly. Supports input configurations such as belts, gears, and couplings.
Motor Mounting Type
A gear reducer integrated with a high-performance compact servo motor. Delivers the highest output performance among gear reducers of the same size.
1U-U: Shaft Input, Shaft Output
Output shaft Input shaft
Steel sulley (housing) Flexible pulley
1U-E: Shaft input, flange output
Flange output Input shaft
Steel pulley (housing) Flexible pulley
1U-C: Motor direct-coupled input, shaft output
Shaft output Flexible pulley
Steel pulley (housing) Motor direct-coupled input
1U-D: Motor Direct Input, Flange Output
Flange output Flexible pulley
Steel pulley (housing) Motor direct input
2XH-A: Motor Direct Input, Flange Output
Flange output Flexible pulley
Steel pulley (housing) Motor direct input
2XH-B: Motor Direct Input, Flange Output
Output shaft Flexible pulley
Steel pulley (housing) Motor direct input
Product parameters
CSF-03 Type
Item | 30 | 50 |
Rated Torque at 2000 r/min [N·m] | 0.06 | 0.11 |
Allowable Peak Torque During Start/Stop [N·m] | 0.13 | 0.21 |
Maximum Allowable Average Load Torque [N·m] | 0.1 | 0.13 |
Instantaneous Maximum Allowable Torque [N·m] | 0.22 | 0.41 |
Backlash [Arcsec] | ≤20 | ≤20 |
Maximum Allowable Input Speed [r/min] | 10000 | 10000 |
Permissible average input speed [r/min] | 6500 | 6500 |
Rotational inertia (1/4GD) [kg·cm²] | 5.3×10⁻⁷ | 5.3×10⁻⁷ |
CSF-03-XX-1U-U Mounting Hole Layout Plan
CSF-05 Type
Item | 30 | 50 | 80 |
Rated Torque at 2000 r/min [N·m] | 0.25 | 0.4 | 0.52 |
Allowable Peak Torque During Start/Stop [N·m] | 0.5 | 0.9 | 1.35 |
Maximum Allowable Average Load Torque [N·m] | 0.38 | 0.53 | 0.84 |
Instantaneous Maximum Allowable Torque [N·m] | 0.9 | 1.8 | 2.5 |
Backlash [Arcsec] | ≤20 | ≤20 | ≤10 |
Maximum Allowable Input Speed [r/min] | 10000 | 10000 | 10000 |
Permissible average input speed [r/min] | 6500 | 6500 | 6500 |
Rotational inertia (1/4GD) [kg·cm²] | 2.5×10⁻⁴ | 2.5×10⁻⁴ | 2.5×10⁻⁴ |
ST-CSF05-XX-1U-U Mounting Hole Layout Plan
ST-CSF05-XX-1U-D Mounting Hole Layout Plan
ST-CSF05-XX-1U-E Mounting Hole Layout Plan
CSF-05-XX-2XH-A Mounting Hole Layout Plan
CSF-08 Type
Item | 30 | 50 | 80 | 100 |
Rated Torque at 2000 r/min [N·m] | 0.9 | 1.8 | 2.2 | 2.4 |
Allowable Peak Torque During Start/Stop [N·m] | 1.8 | 3.3 | 4.3 | 4.8 |
Maximum Allowable Average Load Torque [N·m] | 1.4 | 2.3 | 2.9 | 3.3 |
Instantaneous Maximum Allowable Torque [N·m] | 3.3 | 6.6 | 8 | 9 |
Backlash [Arcsec] | ≤20 | ≤20 | ≤10 | ≤10 |
Maximum Allowable Input Speed [r/min] | 8500 | 8500 | 8500 | 8500 |
Permissible average input speed [r/min] | 3500 | 3500 | 3500 | 3500 |
Rotational inertia (1/4GD) [kg·cm²] | 3.2×10⁻³ | 3.2×10⁻³ | 3.2×10⁻³ | 3.2×10⁻³ |
CSF-08-XX-1U-U Mounting Hole Layout Plan
ST-CSF08-XX-1U-C Mounting Hole Layout Plan
CSF-08-XX-1U-D Mounting Hole Layout Plan
CSF-08-XX-1U-E Mounting Hole Layout Plan
CSF-08-XX-2XH-A Mounting Hole Layout Plan
CSF-08-XX-2XH-B Mounting Hole Layout Plan
CSF-08-XX-2UP Mounting Hole Layout Plan
CSF-11 Type
Item | 30 | 50 | 80 | 100 |
Rated Torque at 2000 r/min [N·m] | 2.1 | 3.5 | 4.5 | 5 |
Allowable Peak Torque During Start/Stop [N·m] | 4.1 | 8.3 | 10.2 | 11 |
Maximum Allowable Average Load Torque [N·m] | 3.1 | 5.5 | 8.5 | 8.9 |
Instantaneous Maximum Allowable Torque [N·m] | 8.2 | 17 | 22 | 25 |
Backlash [Arcsec] | ≤20 | ≤20 | ≤10 | ≤10 |
Maximum Allowable Input Speed [r/min] | 8500 | 8500 | 8500 | 8500 |
Permissible average input speed [r/min] | 3500 | 3500 | 3500 | 3500 |
Rotational inertia (1/4GD) [kg·cm²] | 1.4×10⁻² | 1.4×10⁻² | 1.4×10⁻² | 1.4×10⁻² |
CSF-11-XX-1U-U Mounting Hole Layout Plan
CSF-11-XX-1U-C Mounting Hole Layout Plan
CSF-11-XX-1U-D Mounting Hole Layout Plan
CSF-11-XX-1U-E Mounting Hole Layout Plan
CSF-11-XX-2XH-A Mounting Hole Layout Plan
CSF-11-XX-2XH-B Mounting Hole Layout Plan
Application
Industrial Automation and Robotics
Collaborative Robots (Cobots): Functioning as articulated actuators, enabling flexible and safe human-robot collaboration.
Industrial Robotic Arms: Used in high-speed, high-precision pick-and-place robots such as SCARA and Delta robots.
Automation Equipment: Providing precise motion control for applications like semiconductor manufacturing, precision assembly lines, and 3D printers.
Precision Instruments and Medical Devices
Medical Robots: Such as surgical robots and rehabilitation robots, demanding extreme precision and reliability.
Optical Equipment: Precision focusing and positioning systems for microscopes, telescopes, and laser devices.
Laboratory Automation: Ensuring precise, controllable processes in equipment like DNA sequencers and sample handling systems.
Aerospace and Defense
Satellites and Drones: Serving as drive units for attitude control and antenna pointing systems, adapted to harsh space environments.
Navigation and Guidance Systems: Delivering high-precision motion feedback and execution capabilities.
