THE SEEGER RETAINING RING

Reliability since 1927

Ten years after Willy Seeger had founded his company in October 1917 and had mainly produced transportable cylinder drilling machines for locomotives and cars, his engineer Hugo Heiermann had a groundbreaking idea: He filed a patent for the first SEEGER retaining ring, a cylinder bolt locking device.

Since 1941 the SEEGER retaining rings have been manufactured according to industry standards (DIN 471 and DIN 472) – nothing has changed since then.

Materials

SEEGER rings are manufactured from high-grade spring steels as standard. Depending on size, application and requirements, the steel grades vary in hardness and other, specific properties.

Other types of steel can also be used for special requirements, for example corrosion-resistant stainless steel.

Hardening Process

For heat treating spring steel parts, SEEGER-ORBIS mainly relies on isothermal conversion, as it offers enormous advantages compared to martensitic hardening, the classic quenching into oil.

This significantly increases the toughness and durability of the material, while minimizing the risk of distortion and hardening cracks. In addition, the process requires significantly less energy.

Surface Finish

In order to protect SEEGER retaining rings against corrosion during storage and transport, they are usually zinc-phosphated and oiled.

Depending on the requirements, the surfaces can also be treated specifically, for example by

• galvanizing with zinc and chromated for increased corrosion protection
• Electrophoretic Paint (KTL coating) for additional corrosion protection