USA LLC sells bearings of domestic and foreign production. There are more than 17,000 items of technical products in stock. If there is no model you need, we will offer analogues of bearings that are not inferior in quality to the original. Consultants will help you deal with the modifications, recommend optimal interchangeability.
What is a modification, what are the differences from an analogue
In order to choose a bearing from another manufacturer that is suitable for technical parameters, you need to understand the basics of their classification. If you are looking for a modification of a particular model, then it will be a product of the same manufacturer, but in a different design. Bearings will differ from each other in performance characteristics, technical requirements. At the same time, the main dimensions of the clips (d D B) remain unchanged for each model.
When the task is to find an analogue, it will be products from different manufacturers. Specifications, dimensions and performance must match the original. For example, if you do the same as selection of bearings single-row deep groove ball type, then models will be interchangeable not only with an identical design and with the same cage dimensions (d D B). The accuracy class, radial clearance, maximum load indicator, and other performance characteristics must correspond to the original.
In the auto parts market, table of bearing analogs called "CROSS" is used. The column indicates interchangeable models from other manufacturers. Analogues will differ from the originals by marking. For example, according to the numerical designation, the bearing with the number 180205 will be interchangeable with model 6205.
Each manufacturer adds an additional abbreviation to the main marking. For example, you need a analogue of bearings SKF, NSK, FAG or another company with the number 6205. After the main digital designation, the marking 2RS, 2RS2 or another plan will be applied. As a result, the designation will consist of a combination of two abbreviations: 6205-2RS, 6205-2RS2 or another plan.
How to choose a bearing analogue according to GOST and ISO
Bearings, like any product, are manufactured according to developed standards. The document contains requirements, characteristics, application specifics and other information. ISO standards belong to an international organization that does not certify products. The right to do this is transferred to the manufacturer, who can make his own adjustments.
GOST standards are domestic. Certified products must be produced in accordance with established requirements. The manufacturer does not have the right to make its own adjustments.
By order of Rosstandart, imported analog products manufactured according to ISO standards are marked with GOST R ISO. Hence, interchangeable GOST and ISO products may differ in design.
For example, according to GOST analogues of bearings 3182120K, they will be ISO NN3020K. At the end of the digital marking is the same letter "K", but it reflects different information. In ISO, "K" denotes the conical shape of the landing clip. In GOST "K" indicates the presence of a groove on the outer race for the supply of lubricant. If the number designation is the same, for example - NN3020, but there is no letter “K” at the end, then this is a completely different bearing in design. In this example, the cylindrical shape of the seat race is indicated.
Why do we need interchangeability of bearings, what are the features of the selection of analogues
Branded spare parts are expensive, they are not always on sale. analogues of imported bearings produced by another manufacturer cover the deficit and allow you to quickly repair equipment. In terms of quality, they are no worse, and sometimes even better than the original.
It is necessary to select imported and Russian analogues of bearings taking into account the type of their interchangeability:
- Single-sided . An analogue can be used instead of the original, but replacement is not allowed in the reverse order.
- Equivalent. It is permissible to replace the original with an analogue and in the reverse order.
Selection must be carried out according to modification, purpose, size, design and other technical parameters. For example, if you need analogue of a thrust bearing, then in this category, by appointment, you need to look for it in accordance with the main characteristics. When difficulties arise, contact the consultants of USA LLC for help.
