Products Synchronizer Rings


Composing Synchronizer Rings

128 years of automobile and 58 years of synchronizer rings

128 years ago, Daimler and Benz invented the motorised vehicle. Diehl Metall produced the first synchronizer ring to synchronize the manual transmission more than 58 years ago. The invention of the automobile reduced the distance between cities and rural areas.

In 1902, in the same year, when the cornerstone for the foundation of the Diehl Group was set, Robert Bosch had a big idea. A high-voltage ignition, that brings the internal combustion engine up to speed. With that idea Robert Bosch became the pioneer of constructing electrical equipment for automotives.

But the Americans were those, who enabled the mass production of cars. Henry Ford was the first, who introduced the conveyor-belt production for cars in 1903.

The world grows together but also grows bigger

About one billion of cars and trucks are on the road worldwide. One billion is supposed to be added by the year 2025. Economic growth and progress are depending on mobility. Every day more and more people and goods are on the streets with increasing ways to go. The world grows together but also grows bigger.

Diehl Metall synchronizer rings - always one gear ahead

Gearboxes ensure driving dynamics. The keystone of the mechanical transmission is the synchronizer ring. For more than 50 years Diehl Metall is successful partner of the international automotive industry in the synchronizer ring production. The product portfolio comprises traditional brass synchronizer rings as well as steel synchronizer rings with innovative coatings. Those improve the friction and wearing quality and cover the entire range of performance. As the worldwide market leader in this field Diehl Metall is a competent specialist for the optimisation of existing gearboxes and the development of exactly fitting solutions for new transmission projects.

The drive comes from within

The drivers hardly see the synchronizer rings, but the reliability of the transmissions is decisively depending on them. Diehl Metall synchronizer rings prove their enormous capability a million times on the roads, day by day. They have been providing comfortable and noiseless shifting in the vehicle. Our product range comprises about 150 different types of synchronizer rings for almost every European vehicle manufacturer of manual transmissions. Every year more than 50 million high-quality brass synchronizer rings are produced. Each of them goes through an intensive quality control. The patented Diehl hybrid multiple-cone set is the solution for optimum heat regulation.

Synchronizer rings made of brass and steel

The challenges of the automotive industry increase

A perfect partnership is always based on confidence. Both, the development and in-house production of high-performance alloys as well as our own tool manufacture provide the best conditions for a tailored design of modern engine and transmission technologies.

The close collaboration with our customers and focusing our development activities to your demands are the centre of our actions. It goes without saying that the development of new synchronizer rings is always done in close cooperation with the transmission and vehicle manufacturers. We gladly support you with your projects and are always focused on the trustful interaction with respect to the demanded goals: smaller aggregates and reduced consumption as well as light weight construction in the whole vehicle.

  • Miniaturisation to reduce weight
  • Lower fuel consumption
  • Stability and running smoothness
  • High engine performance while reducing emissions (high temperature applications, wear resistance)
  • New legal guidelines; recycle ability of components (limitation of lead, ideally lead-freeness)

Technology impulses of the Diehl Group

Diehl Metall focuses on the principle of miniaturisation in an international manufacturing management concept. Thus, a significant increase in the efficiency of existing technologies can be achieved with innovative products.
The innovative technology concepts of the whole Diehl Group enable the use of impulses of other technological fields for our developments in the driveline. So, Diehl Metall offers "customized solutions" for all types of vehicles at any time.
The requirements to each type of vehicles are as different as the variety of all series of the major automotive manufacturers with the respective philosophies behind it. Due to our international locations in Germany, Brazil, China and India, the supply of the international markets is ensured. In addition, we are able to customize the development partnerships with our customers to the market requirements in an optimsed way. As our customer you can be sure to receive the product in the demanded quality.

Diehl Metall brands for synchronizer rings with or without friction layers

  • Formed@Diehl
  • Diehl BlackLine
  • Diehl GoldLine
  • Diehl SilverLine

The brand Formed@Diehl offers cold formed as well as forged products to the customers - directly from one single source.

Diehl BlackLine represents high-end friction layers out of carbon, which were developed for highest demands on friction performance and wear resistance. Diehl GoldLine is a sintered powder friction layer based on bronze with an excellent friction performance. Diehl SilverLine is an innovative and cost-effective sintered friction layer based on iron.

Read more about the Diehl Metall Schmiedetechnik brands


Your Contact Persons

For Europe and North America:

Diehl Metall Schmiedetechnik
Tel. +49 911 5704-0
Mail: sales-schmiede@diehl.com

For South America:

Diehl do Brasil Metalúrgica Ltda.
Tel. +55 11 216401-02
Mail: sales-brasil@diehl.com


For Asia:

Diehl SynchroTec Manufacturing (Wuxi) Co. Ltd.
Tel. +86 510 881564-01
Mail: sales-wuxi@diehl.com


For India:

Diehl Metal India Pvt. Ltd.
Tel. +91 20 66742-603
Mail: sales-india@diehl.com

Download Brochure

Download product brochure synchronizer rings

Mega Trends

Mega Trend Mobility

Our synchronizer rings are the drive for high-performance transmission solutions within the mega trend mobility.

Mega Trend Energy

The patented Diehl hybrid multiple-cone set for dual-clutch transmissions to reduce fuel consumption.

Mega Trend Industry

More than one billion synchronizer rings have been produced by Diehl Metall for the European automotive industry.

Mega Trend Green Technologies

We attach great importance to sustainable alloys for our synchronizer rings.

Read more about the Diehl Metall mega trends