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Bearings are mechanical devices that allow one part to move relative to another with minimal friction. They are commonly used to support the rotation of axes in various machines and equipment.

Bearings work by placing balls, rollers, or needles inside ring-shaped housings called outer and inner rings. Balls or rollers are placed between these rings and a lubricant such as oil or grease to reduce friction and wear.

There are different types of bearings including:

  • Ball bearings. Based on balls located in annular grooves, used to transmit radial and axial loads
  • Roller bearings. These are bearings in which rollers rotate in grooves inside a ring.
  • Linear bearings. Designed to move in a straight line, they include guides and swinging elements.
  • Spherical bearings. In turn, they provide rotation or rotation around an axis and are often used in connections and gaskets.

Each type of bearing has its own advantages and disadvantages, and the choice of a particular type depends on the specific requirements of the application.

Bearings play an important role in various industries, such as industry, transport, energy, medicine, etc. They allow efficient transmission of mechanical energy and ensure smooth rotation of the axis.

Advantages of contacting STEMAG GROUP

At STEMAG GROUP you can order and buy bearings at a competitive price with the possibility of delivering goods to all countries of the Middle East and Central Asia.

The company provides:

  • the ability to choose the required type of bearing independently or with the help of our consultants;
  • supplies only high-quality bearings from reliable, trusted manufacturers.

Conveyor units and elements

Bearing assembly is a structural element that combines a bearing and a bearing housing, and consists of the following components:

  • body made of cast iron or special materials. May consist of two or more parts that can be bolted to the mounting surface;
  • one or more bearings that are mounted directly on the shaft or connected using an adapter sleeve;
  • sealing system that protects bearings during operation;
  • device for re-lubricating bearings during operation.

Bearing units were first manufactured in Japan. Later, the production of housing bearings began in Europe and America. Bearing units are produced under the brands SNR, SKF, INA, Koyo, NTN, TIMKEN, FYH, ASAHI. The most common types of standard bearing housings are:

  • detachable stationary housings;
  • one-piece stationary buildings;
  • flanged housings;
  • tension housings.


The most common types of conveyors are:

  • Screw (auger) conveyor

consists of a groove and an Archimedean screw located in it; used for bulk solids.

  • Rope conveyor
  • Oscillating Conveyor

used for small objects rolling or sliding on an inclined swaying surface.

  • Bucket conveyor

the load-carrying part of the conveyor is buckets, the suspension axis of which passes through the middle point, which allows them to swing; for transporting bulk materials (coal, crushed stone, slag, clinker), buckets are installed with an overlap without gaps, in contrast to mechanisms for gravity loading, like elevators.

  • Belt Conveyor

consists of an annular belt, tension and drive drums and support rollers; It is usually used for transporting bulk substances; modifications are possible (tubular, z-shaped, rotatable by 90 and 180 degrees) due to the deformation of the belt.

  • Conveyor with modular belt

consists of a plastic (polyurethane, polypropylene, polyacetal) tape, tension and drive unit with sprockets; used for transporting bulk substances, piece goods, and open products. Conveyors with a modular belt can have a different movement path: rotary, zigzag, spiral.

  • Plate Conveyor

the load-carrying part of the conveyor is the plates;

  • Chain plate conveyor
  1. consists of two parallel circuits connected to each other by plates.
  2. special plastic or stainless steel chains
  • Pneumatic conveyor

conveyor, the traction of which is provided by air flow

consists of a tube and closed containers moved along it, tightly adjacent to the walls;

Bulk material moves in the air flow as a suspension (air chute).

  • Overhead conveyor

differ in that the moving bodies do not lie, but hang on load-carrying fasteners, and the conveyor mechanisms themselves are also suspended.

  • Roller conveyor

consists of rollers fixed to a frame, individual rollers can be driven, or the entire frame is inclined, as is the case with a gravity roller conveyor; used for large solid objects.

  • Scraper Conveyor

consists of a chute and scrapers moving bulk material along it, usually attached to a ring chain; unloading can be carried out either at the end of the conveyor or through openings in the chute.

  • Spiral conveyor (flexible)

consists of a groove and a spiral located in it; used for bulk solids, higher productivity compared to a screw conveyor.

consists of a chute and a (wire, ring) rope on which metal discs are attached that move a non-abrasive material (for example, coal) inside the chute.

  • Trolley conveyor

used for moving assembled and welded units in production lines. When using a floor-mounted trolley conveyor, it is advisable to use trolley platforms for mounting assembly and welding equipment on them.

  • Walking Conveyor (Stepper Conveyor)

used for moving assembled and welded units in production lines. When using a floor-mounted trolley conveyor, it is advisable to use trolley platforms for mounting assembly and welding equipment on them.

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