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Technische Handelsonderneming Nederland b.v.

Postbus 390
7500 AJ Enschede
T. +31 (0)53 432 34 46
F. +31 (0)53 430 71 58
Technische Handelsonderneming Nederland b.v.

Postbus 390
7500 AJ Enschede
The Netherlands
T. +31 (0)53 432 34 46
F. +31 (0)53 430 71 58
E. info@thn.nl

Office:
H. ter Kuilestraat 30
7547 BD Enschede
The Netherlands

FK6 - Double-wound laminar sealing rings


FK6 Applications

FK6 laminar rings are double-wound steel sealing rings. They are used as a grease seal for roller bearings and bearing bushes, for example. When greased, they protect against grease leakage and the ingress of dust, dirt and splashing, particularly if the sealing requirements are high. Double-wound laminar rings have a uniform contact pressure and, unlike "FK3" single-wound laminar rings, have no butt openings. The sealing effect of the combined "FK6 ASKD" and "FK6 ISKD" sets (additional seal through an additional ring, which seals against the groove diameter) is optimised by the enhanced labyrinth effect.

The externally tensioned sets "FK6 ASD" and "FK6 ASKD" are usually preferred over the internally tensioned sets "FK6 ISD" and "FK6 ISKD". The reason is that they are easier to install and allow higher admissible speeds. Depending on the application and technical requirements, the ring holders can be made in steel, cast iron or plastic.


Types

Implementation Description
FK6 ASD Double-wound laminar ring, externally tensioned
Seal on the housing with groove in the shaft
1 set consists of 2 rings
FK6 ASKD Double-wound laminar ring, externally and internally tensioned
Seal on the housing with groove in the shaft
1 set consists of 2 externally tensioned and 1 internally tensioned rings
FK6 ISD Double-wound laminar ring, externally tensioned
Seal on the shaft with a groove in the housing
1 set consists of 2 rings
FK6 ISKD Double-wound laminar ring, internally and externally tensioned
Seal on the shaft with a groove in the housing
1 set consists of 2 internally tensioned and 1 externally tensioned rings

FK6-ASD Detail FK6-ASKD Detail FK6-ISD Detail FK6-ISKD Detail
FK6-ASD FK6-ASKD FK6-ISD FK6-ISKD

Materials

Material Temperature Surface treatment Colour
C75S DIN 1.0605 max. +300°C oiled varying ¹)
C60E DIN 1.1221 max. +300°C oiled varying ¹)
50CrV4 DIN 1.8159 max. +400°C oiled varying ¹)
CrNi DIN 1.4310 max. +450°C bright and dry varying ¹)

¹) The colour of the laminar rings may vary between silver, light brown and black as a result of the heat treatment.

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