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RINGFEDER TNM Elastic Couplings

RINGFEDER TNM are torsionally flexible, puncture-proof shaft couplings with two metal hubs with front claws and a rubber element. They transmit torque through pressure-stressed elastic buffers connected to each other in an intermediate ring, which absorbs shocks and torsional vibrations. This element is oil resistant and electrically conductive. TNM coupling hubs are made of grey cast iron as unbored.

TNM couplings can be used for both directions of rotation and each mounting position.

Formerly they were sold under the TSCHAN NORMEX designation.

RINGFEDER TNM E Elastic Couplings - Preview

E Series (Complete Kits)

Basic Design with One-Piece Hubs
Kit: 2 hubs + elastic element
RINGFEDER TNM G Elastic Couplings - Preview

G Series (Complete Kits)

Design with Claw Ring
Kit: 2 hubs + claw ring + elastic element
RINGFEDER TNM Elastic Elements - Preview

Elastic Elements

Spare parts for RINGFEDER TNM couplings of various sizes

Series of TNM Couplings

We offer flexible TNM couplings in two versions:

Product Series Description Illustration

E Series

Basic Design with One-Piece Hubs

Each of the hubs therefore consists of only one part.

When replacing a worn flexible element or disassembling and assembling, it is necessary to move the individual machine parts.

RINGFEDER TNM E - Basic Design with One-Piece Hubs

G Series

Design with Claw Ring

One of the hubs is composed of two parts – a flange hub and an outer claw ring, which is bolted to the hub.

When replacing the worn flexible element, or disassembling and assembling, it is not necessary to move the individual machine parts, but it is sufficient to disassemble the two-piece hub.

RINGFEDER TNM G - Design with Claw Ring

In addition to these basic series, it is also possible to order couplings with a spacer (TNM H), couplings with a brake drum (TNM EBT and TNM GBT), couplings with a brake disc (TNM ETW and TNM GTW) or couplings with a flange (TNM LE and TNM LG). If you are interested, please use the form below.

Couplings Construction

RINGFEDER TNM E Coupling Construction

  1. One-piece hubs
  2. Elastic ring

Couplings Fields of Use

RINGFEDER TNM (formerly TSCHAN NORMEX) elastic couplings are designed for the highest requirements in a wide range of industries, especially for compressors, pumps, conveyors and many other machines.

Robust design and excellent damping properties guarantee users maximum operational reliability, especially in applications with significant shock, alternate or vibration loads.

Couplings Characteristics

  • Compensates for angular, parallel and axial shaft misalignments of the connected machines
  • Elastic elements of two different Shore hardness are available
  • Elastic elements operate in temperature ranges of −30 °C to +100 °C
  • Replacement of elastic elements without axial movement of the coupled machines (principle of the multi-part design)
  • Max. finished bore: 280 mm
  • Nominal torque of coupling TKn = 41,000 Nm / TKmax = 97,500 Nm
  • Operating speed to nmax = 5000 1/min

Documents for Download

TNM Elastomer Jaw Couplings - Preview

TNM Elastomer Jaw Couplings


English (PDF 2.55 MB)

Ask Our Specialists

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We also provide design and calculation of transmission components, including shaft couplings. In the case of your interest in this service, use the detailed Transmission Drive Design Form.

Shaft Coupling Manufacturer Profile


RINGFEDER POWER TRANSMISSION GMBH is the international leader in niche markets for drive and damping technology. The company offers their users worldwide outstanding locking devices, damping solutions and coupling systems for the highest functionality and durability requirements in a wide variety of industries.

They not only provide their customers with expert advice based on almost 100 years of experience and expertise, but also develop innovative, tailor-made solutions together with them. Subsidiaries in Germany, the USA, Brazil, China and India as well as a worldwide service and partner network contribute to the global success of the company.

TYMA CZ is an authorized regional distributor of RINGFEDER.

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