Precision One-Way Clutch & Freewheel Solutions
Trusted manufacturer of overrunning clutches, backstop clutches, and electric bicycle motor clutches with 25+ years of engineering excellence.
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Trusted manufacturer of overrunning clutches, backstop clutches, and electric bicycle motor clutches with 25+ years of engineering excellence.
Changzhou Dingsen Transmission Technology Co., Ltd., operating under the brand WOK, is a leading private enterprise specializing in the research, development, production, and sales of one-way clutches. Established in 2005 and located in the economically vibrant Changzhou region of the Yangtze River Delta, we have over 25 years of focused expertise in clutch technology.
We offer nearly 500 product varieties across eight categories, including one-way bearings, overrunning clutches, backstops, and motorcycle starter clutches. Our components are widely used in automobiles, electric vehicles, motorcycles, textile machinery, printing equipment, agricultural machinery, and industrial reducers.
Comprehensive selection of one-way clutches, freewheel mechanisms, and precision transmission components for industrial and automotive applications.
High-efficiency planetary gear clutches for mid-drive and inner rotor e-bike motors. Smooth engagement and compact design.
Precision-engineered overrunning clutches for reliable torque transmission in bidirectional systems.
Needle roller one-way bearings with high load capacity and low friction for compact assemblies.
Prevents reverse rotation in conveyors, elevators, and heavy machinery. High torque capacity and durability.
High-performance sprag-type overrunning clutches for automotive and industrial applications.
OEM-quality starter clutches for major motorcycle and ATV brands. Reliable engagement and long life.
Compact freewheel mechanisms for bicycles, fitness equipment, and light industrial drives.
Precision machined gears, splined shafts, and transmission components for custom clutch assemblies.
Engineered for performance, durability, and precision in demanding applications.
ISO-compliant processes, 100% testing, and advanced metrology ensure consistent performance.
Decades of R&D and manufacturing excellence in one-way clutch technology.
Distributed in 30+ countries with responsive technical and sales support.
OEM/ODM services available for specialized clutch and transmission needs.
An overrunning clutch, also known as a one-way clutch or freewheel, allows rotation in one direction while locking in the opposite direction. It is commonly used in motors, transmissions, and conveyor systems.
Our products are used in electric bicycles, motorcycles, automobiles, textile machinery, printing equipment, agricultural machinery, plastic machinery, mining, metallurgy, and medical fitness devices.
Yes, we offer OEM and ODM services. Our engineering team can develop custom clutch solutions based on your specifications and application requirements.
We follow strict quality control processes and have participated in the formulation of two national industry standards. Our manufacturing adheres to ISO practices with full in-house testing capabilities.
Please visit the official website at overrunningclutch.com to contact the sales team directly for inquiries and orders.
For product inquiries, technical support, or custom solutions, reach out to our team.
Phone / WhatsApp: +8613506119400
Email: [email protected]
Address: No. 9, Hejia Road, Benniu Town, Xinbei District, Changzhou City, Jiangsu Province, China
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