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Дворедни комплетни цилиндрични ваљкасти лежајеви

Double-row full complement cylindrical roller bearings can absorb the greatest radial force due to the largest possible number of rolling elements. The bearings are very robust and are especially suitable for space-saving construction. The speed of full complement bearings is significantly lower than that of cylindrical roller bearings with cages. Double row full complement cylindrical roller bearings are removable, easy to install or remove. They are suitable for low speeds and only allow a limited degree of angular error.

Димензије и толеранције

AUB offers double row full complement cylindrical roller bearings with standard tolerances (PN) according to DIN 620-2 (Roller bearing tolerances) and ISO 492 (Radial bearings - Dimensional and geometrical tolerances). All other deviations or special tolerances must be specified on the order.

Беаринг Десигн

Double row full complement cylindrical roller bearings are dismountable and non-locking bearings in NNC, NNCL, NNCF and ACB types.

  • The inner ring of NNC bearing has 3 integral ribs, and the outer ring has 1 integral rib and looper shoulder. They can absorb axial forces from both directions and can therefore be used as fixed bearings. The support of the loose shoulder ring through structural design is to absorb the requirement of axial force from two directions.
  • NNCL bearings have three solid ribs on the inner ring and a ribless outer ring with two locking rings. The absence of a flange helps maintain shaft clearance in the axial direction of the housing and enables the bearing to function as a floating bearing.
  • The inner ring of the NNCF bearing has 3 integral ribs and 1 rib on the outer ring, which is conducive to absorbing axial force in a single direction.

Comparison of Roller Profile and Tension Distribution of Cylindrical Rollers

By default, AUB's cylindrical roller bearings are designed with an optimized contact area between rolling elements and raceways. Due to the logarithmic profile of the cylindrical rollers, damaging edge tensions are avoided even under very high loads. Cylindrical roller bearings can have cylindrical or tapered bores.

Зазор лежаја

AUB offers double row cylindrical roller bearings with standard clearance (CN) according to DIN 620-4 (Rolling bearing tolerances) and ISO 5753-1 (Rolling bearings - Internal clearance), but they are also available with restricted clearance in all clearance classes or special permission. Bearing components of standardized bearing types with the same standard clearance are interchangeable with each other. For clearance classes smaller than CN or restricted clearance classes, the interchangeability of bearing assemblies is no longer possible because the assemblies must be compatible.

AUB cylindrical roller bearings are available in a variety of designs, dimension series and sizes. Most are single row bearings with cages. Single and double row full complement bearings (without cage) complete General Engineering's standard range. Bearings with cages can withstand large radial loads and can run at high speeds. Full complement cylindrical roller bearings are suitable for very heavy radial loads at moderate speeds.

The rollers of AUB cylindrical roller bearings are the key components. Their geometry, the so-called logarithmic distribution, provides optimum stress distribution in the contact zone of the bearing. Their surface finish maximizes the lubricant film and optimizes the rolling motion of the rollers. The resulting benefits include enhanced operational reliability and greater insensitivity to misalignment compared to conventional designs.

AUB cylindrical roller bearings have the following design features:

1. Optimize the rib and roller design to improve the axial load capacity.

2. Optimize the geometric surface design between the roller and the raceway to balance the radial load distribution.

3. Limit the undercutting of the raceway width, increase the contact area between the raceway and the rollers, and improve the radial load capacity.

4. High standard materials, strictly control element content, such as Ti<30ppm.

5. Low-noise design, reaching the V1 noise level, which helps to run the car engine and gearbox more quietly.