Special non-contact CF seals are suitable to seal spindle bearings.
They have the highest efficiency in minimal installation space. The L/M or S/Sa designs are made to seal standard bearings.

Labyrinth seals made of metal from the L and M series achieve 1 to 4-stage labyrinths (depending on the size) in the smallest radial design space.

The CF design provides absolute leak tightness within a minimized space of 6 mm width only (all sizes) – even when the machine is stopped.

Non-contact seals work completely free of friction and wear.

They are particularly suitable for use with high RPM’s (such as in machine spindles) and in systems in which the seal friction is relevant and not desired (for example, in the electronics industry).

Friction-free operation additionally increases efficiency (no power losses). Labyrinth seals made of plastic meet the highest purity requirements (no abrasion) for the food and chemical industries.

Non-contact seals can be used against any spraying and dusting, but they cannot seal against liquid levels or differences of pressure.

For sealing against non-metallic dust, specially greased labyrinth seals made of plastic (types S and Sa) are suitable.

If the use of a contact seal is unavoidable because of liquid levels, the service life of this seal can be substantially increased by an additional non-contact seal, e.g. as a protective seal against chips.

GMN labyrinth seals in designs CF… S10 are made of hardened steel, normally roller bearing steel.

(Special versions of the CF design made of aluminum or uncured steel for sealing standard bearings on request)L and M GMN labyrinth seals have an inner ring made of unalloyed structural steel and an outer ring made of aluminum (GD AlSi12).

S and Sa GMN labyrinth seals are made of high-quality polyoxymethylene.

Labyrinth seals made of plastic, models S-, and Sa can be used up to 60 °C.

GMN labyrinth seals made of metal, models CF..S10 can be used up to 170 °C.

GMN labyrinth seals made of metal, models L and M can be used up to 200°C.

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