Slim Bearings


Bearing type

  • 2 Race rings with profiled raceways 
  • Plastic cage with retained balls


  • Simple, compact integration, LSA, infinitely variable Ø range
  • Cost-effective alternative to standard slim bearings
  • Not preloaded bearings

Diameter range

  •  from 4" to 30"

In detail

Bearing type

Franke slim bearings of type LSA deliver a convincingly smooth run, require extremely compact mounting space, ensure simple assembly and come at a favorable price.


Slim bearings type LSA consist of one inner and one outer race ring with hardened and profiled raceway and a plastic cage with retained balls. The rolling elements touch the race rings at two points each, hence ensuring the 4-point system. The race rings are separated; their diameter can therefore be altered elastically for mounting.

Mating structure

The slim bearing determines the overall construction's load bearing capacity. Hence the mating construction can be made of alternative materials such as steel, aluminium or plastic. Axial and radial accuracy (see diagram below) are defined to a substantial extent by the mating components. These properties can be enhanced by boosting the accuracy of manufacture.

In order to ensure the best possible function of the bearing, technical advice and design is absolutely necessary. Please contact our specialists.

Constructive example

Technical details


Material Ball race rings: 54SiCr6, rolling elements: 100Cr6, cage: PA12
Temperature in use –30 °C to +80 °C, briefly up to +100 °C
Circumferential speed max. 5 m/s, without seals max. 10 m/s
Lubricant grease Klüber Isoflex Topas NCA52 or Shell Gadus S3 V220
Lubricant schedule see Technical Information
Tolerance details see Technical Information