Flywheel Couplings offer hardness mixture option.

Press Release Summary:

With Arcusaflex® natural rubber hardness mixture, element version UN, Arcusaflex® Flywheel Couplings feature durability for high-torque applications such as compressors and gen-sets. Units come in 21 sizes with torque ranges from 1,770-973,580 lb-in., which corresponds to approximately 6,500 kW at 1,000 rpm. All couplings meet European explosion protection standards set by ATEX 95 and are certified for use in hazardous locations according to 64/9/EC Directive.

Original Press Release:

Ringfeder Offers New Hardness Mixtures For Arcusaflex® Flywheel Couplings

Westwood, NJ- Ringfeder Corporation is pleased to announce a new option for their Arcusaflex® flywheel coupling product. A hardness mixture for higher torque applications is now available across the entire Arcusaflex® line.

The new Arcusaflex® hardness mixture, element version UN, was specifically designed for high inertia applications. By using high quality materials the new hardness mixture provides extreme durability in high torque applications such as in compressors and gen-sets.

Ringfeder offers four natural rubber hardness levels across the Arcusaflex® line. They are, from softest to hardest, element versions WN, NN, SN and UN. They also offer a silicon mixture, element version WX to handle higher temperature applications up to 266°F (130°C).

All Arcusaflex® flywheel couplings meet European explosion protection standards set by ATEX 95 and are also certified to be used in hazardous locations (Categories M2, 2 + 3) according to the 64/9/EC Directive.

Arcusaflex® flywheel couplings are available in 21 different sizes, with torque ranges from 1,770 to 973,580 lb-in which corresponds to approximately 6500 kW at 1000 rpm. Special configurations are available upon request. Download the latest
AC-31 catalog at

Ringfeder Corporation markets a wide range of quality power transmission components and has been the industry leader in keyless shaft/hub technology for more than 36 years. Some other power transmission solutions provided by Ringfeder include shock absorbing devices, flexible elastometric couplings, flexible disc couplings and torque limiters, along with other specialty and custom made products.

For more information, specifications, pricing or delivery, contact your local Ringfeder distributor. Ringfeder engineering and technical support groups are available for specific technical data or Q&A on all Ringfeder products at or at 800-245-2580.

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