Ringfeder Barrel Couplings
Ringfeder barrel couplings deliver high torque capacity, precise misalignment compensation and durable performance for crane and hoist systems.
The Ringfeder TNK / TKVO barrel coupling series is a high-performance, application-optimised solution designed specifically for rope drum connections in crane and hoist lifting systems. Manufactured from high-strength materials, this coupling type delivers exceptional torque capacity, durability and operational reliability in demanding lifting applications.
Engineered in accordance with SEB 666212 German steel industry standards, the TNK / TKVO series is purpose-built for heavy-duty rope drum hinge joints, combining compact design with simplified assembly and long service life. The TNK / TKVO barrel coupling consists of a high-strength housing with semi-circular internal gearing and a matching hub. Steel barrel rollers are positioned within this circular interface to transmit torque efficiently while allowing controlled relative movement between components. This design enables the coupling to accommodate angular misalignment and limited axial displacement during operation, making it highly suitable for dynamic lifting environments.
Features
- Torsionally rigid design with controlled compensation for angular and axial shaft misalignment
- High-strength steel construction for hub and housing
- Steel barrel roller torque transmission system
- Integrated inner ring enables fast, simplified installation
- Compact design optimised for rope drum applications
- Built-in wear indicator for easier condition monitoring
- Effective sealing system to protect against contamination and lubricant loss
Technical Range
- Available in 18 sizes
- Bore diameter (d1): up to 440 mm
- Outer diameter (D): up to 850 mm
- Overall length (L): 95 – 450 mm
- Maximum torque (TKmax): up to 815,000 Nm
- Maximum radial load (Frad): up to 490,000 N
Applications
- Crane lifting gear systems
- Rope drum drive assemblies
- Hoist and winch systems
- Heavy-duty material handling equipment
- Industrial lifting and hoisting applications
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