Sferax is a Swiss company that specialises in linear bearings manufacture. They produce a wide variety of different bearing types, including Metric ball bearings, Open ball bearings and Miniature ball bearings. Sferax also produces Compact ball bearings and bearings for rotating shafts in both stainless steel and other materials.

A Brief History of Sferax Linear Bearings Manufacture

The Sferax company was originally founded by Claude-André Bétrix back in 1962, before notable expansions in 1967 and 1980 brought the company closer to the globally renowned entity they are regarded as today. These days, not only do they continue to operate out of their main facility in Cortaillod in the west of Switzerland (in a building architecturally designed by Bétrix’s eldest daughter), but they also have subsidiary premises in Emmendingen, Germany.

Sferax Linear Bearing Product Specifications

The dynamic load of Sferax linear bearings is usually half of a static load, with the preload specifications depending on the application of the machinery they are being used with and the dimension they are intended to fit. In general, it can be anywhere between 0.002 and 0.02mm on the shaft diameter.

The maximum movement speed for the ‘Standard’ Sferax linear ball bearing is 5 m/s, with an acceleration of 100 m/s squared (150 m/s squared for the ‘Special’ Sferax linear ball bearings). It should also be noted that in the event of ball-bearing movement, there must be a reduction of the speed at the end of the stroke.

As the Sferax linear bearings feature a significant reduction in friction, this allows any heavy loads they are managing to be shifted longitudinally with a minimum expenditure of power and energy. This makes the Sferax linear ball bearings some of the most energy and power efficient bearings on the market, hence their popularity around the world.

The bearings do require lubrication, with there being a strong preference for thin-bodied oil during high speed applications. A lithium-based grease is recommended, but again the viscosity will be entirely dependent on how much speed is being applied in the process. If it is a slower paced application, then a thicker lube is fine, but the faster the process goes the thinner the lubricant needs to be to allow the bearings to operate at full functionality.

Sferax Linear Bearings Maintenance Advice

It’s imperative that the bearings are kept clean, so make use of rectified benzene and/or petroleum to ensure the cleanliness of the bearing is maintained. Another good piece of advice regarding keeping the bearings clean is to use compressed air, either in a canister or other source. This allows you to blast the hard to reach areas clean without causing them any unnecessary wear and tear.

JESA is a top-quality, reliable global partner for applications such as machines used in packaging, printing, textiles and transport, as well as high-speed and high-precision linear guidance applications.

Examples of industrial applications:

Intecom is a leading company in the production and selling of rolling bearings, having a dynamic and always updated catalogue that offers all the different types of product.

The company is also specialised in the production of spare part bearings for fork lifts with small and big capacities, and in the design of special bearings for general handling.

The very flexible structure of Intecom allows us to design, manufacture and sell small and big quantities of rolling bearings with balls or rollers.

Fixed combined bearings for laminated standard U profiles.

INTECOM full complement ball fixed combined bearings are particularly suitable to be used in fork lift masts and in any other moving and handling system, where laminated or extruded profiles are used.

The excellent combination of radial-axial part allows high load capacity with extremely small dimensions, in addition to assembly easiness on any type of structure.U steel laminated profiles

Steel laminated profiles are used in different industrial sectors, where a linear mouvemnt is necessary. They are also used for fork lift masts, but also in the food, textile and automotive industry.

Within these profiles, slide all the types of combined bearings with centred (not inclined) external profile, both with little and big dimensions.

Back-up rollers with pivot for flattening machine

Materials:Outer rings: UNI 16CrNi4 case and core hardened steel with hardness 60±2 HRC

Inner rings: UNI 100Cr6 core hardened steel with hardness 60±2 HRC.
Cages: glass-fibre-reinforced polyamide, pressed steel plate, M-shaped section structural steel (depending on the size).
Track rollers with cylindrical rolls - NNTR Series
The rollers of this type of bearing have a very thick outer ring in order to guarantee the mechanical strength to reduce deformations due to loads and to bear high impacts.

Track rollers are designed to run on all types of tracks and to be used in cam drives, conveyor systems, etc.

The outer ring running surface is crowned as standard. With the exception of single row cam rollers, track rollers are also available with a cylindrical (flat) outer ring running surface.