Ringfeder TNR Torsional Highflex Couplings for Diesel Engine and Generator Applications (SAE J 620 Standard)

1. What Are Torsional Highflex Couplings?

Torsional Highflex Couplings are specialized flexible shaft couplings that ensure smooth torque transmission while compensating for misalignments and absorbing torsional vibrations. The Ringfeder TNR series is engineered to handle high torque loads and harsh working conditions, making it ideal for coupling diesel engines to generators.

The typical structure of a Torsional Highflex Coupling includes:

• Elastic element: Usually a rubber or polymer insert, this is the core that provides flexibility. Such as: Pb 70, 16 Pb 70 /Pb 60/80 H7; 11,5 Vk 90 /Vk 80/2517/48; Vk 90/100 H7; v.v..

• Hubs or flanges: Attached to the shafts, these connect with the elastic element.

Torque transmission design: Depending on the series, such as the TNR series, this may include teeth, bushings, or molded grooves that maximize grip while allowing for torsional movement.

2. Technical Specifications of Ringfeder TNR Couplings

• Torque capacity: From 160 Nm up to 68,000 Nm

• Speed range: 1,500 – 6,000 RPM

• Temperature range: −50°C to +130°C

• Construction materials: High-performance steel, elastomers in synthetic rubber or polyurethane

• Flange standard: Compliant with SAE J 620

• Design options: Sizes 2425.1, 2425.2, 2428.1, 2428.2, 2424.1, 2424.2

These Ringfeder TNR Couplings feature a unique hub-housing geometry with intermeshing gear teeth and a preloaded elastomer element. This design ensures gradual torque transmission with enhanced vibration damping performance, even under dynamic load variations.

Key Features of TNR Series Couplings

These attributes make the TNR series a preferred option for OEMs and MRO professionals looking for long-term reliability and flexible drive solutions.

3. Application in Diesel Engine and Generator Systems

Below is the interaction of stiffness changes and resonance speeds demonstrated on a diesel engine driven generator:

As demonstrated in the figure above, the effects of resonances may be shifted to lower speeds by reducing the dynamic coupling stiffness without changing the connected dimensions. Hyper-critical operation is possible and optimal running smoothness is achieved by adjusting the stiffness of coupling through judicious selection of elastic buffers.

When integrated between a diesel engine and a generator, TNR couplings play a critical role:

• Damp torsional vibrations to protect engine and generator shafts

• Compensate for axial, radial, and angular misalignments

• Minimize stress on connected equipment

• Operate quietly and smoothly under fluctuating load conditions

With SAE J 620 flanges, these Diesel engine couplings are easy to mount and replace, supporting efficient system maintenance and reducing downtime.

4. Maintenance and Durability Advantages

Ringfeder TNR Couplings are nearly maintenance-free flexible shaft couplings. The elastomeric elements can be replaced without disassembling the connected machinery or moving the shafts, which significantly cuts down maintenance time and cost.

The long service life and operational safety under extreme temperatures and harsh environments make them a preferred choice in power generation, marine, oil & gas, and heavy machinery sectors.

5. Why Dai Hong Phat Corp Leads in Gear Coupling Solutions

Dai Hong Phat Corp is a trusted name in the industrial Torsional Highflex Couplings market. With over 15 years of experience in mechanical transmission solutions, Dai Hong Phat is a trusted name in Vietnam and Southeast Asia. As an Authorized Distributor of Ringfeder Germany.

Benefits of Partnering with Dai Hong Phat:

• Direct import of Ringfeder products from Germany

• Full CO/CQ documentation provided for all items

• 24/7 product availability with fast delivery

•  Dedicated technical support team offering tailored consultation

•  Free product specification conversion upon request

• Technical drawings available for design and installation purposes

•  Professional processing workshop to refine products to match operational needs

Whether you’re upgrading a single machine or equipping a full production line, Dai Hong Phat ensures that you get the best coupling solution with expert support.

Contact Dai Hong Phat Corp Today!

Discover how Gear Couplings can boost your machinery's performance and reliability. Let Dai Hong Phat help you choose the right model tailored to your exact needs.

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