Skf bearing select has been designed in alignment with the bearing selection. This booklet is intended as a guide to bearing maintenance, with the main consideration being onsite bearing maintenance. Bearing design and features, sealshield bearing types and selection shield type seal type type, code no. Ntn bearing cross reference chart, ntn bearing interchange. Ntn bearing cross reference chart, ntn bearing interchange ntn bearing cross reference can help you to match various other brand bearing designations to ntn bearings. Bearing units skf bearing units typically consist of a housing, bearing, seal, lubricant and shaft locking mechanism. Technical data ntn the ntn bearing unit is a combination of a radial ball bearing, seal, and a housing of highgrade cast iron or pressed steel, which comes in various shapes. The above diagram shows these selection criteria and the related bearing ratings and static safety factor, which are described in detail in the relevant subsections.
Our supporting materials such as catalogs, spec sheets, faqs and success reports, keep you, your team, and your customers up to date with our entire product line, important technical information, and the benefits of ntn products. The outer surface of the bearing and the internal surface of the housing are spherical, so that the unit is selfaligning. The table above is applicable to oil bath lubrication and recirculation lubrication. Home bearing manufacturing india spherical roller bearings. Precision rolling bearings technical data ntn global. Generally, for the same dimensions, the cylindrical roller bearing stands heavy loads than the deep groove balls bearing. Skf can provide a portfolio of different calculation methods to optimize bearing selection for any kind of application.
Replacement by lownoise bearings, selection of small clearance bearings. Linear bushing bearings use a round shaft and linear way bearings have a rectangular shaped track. Thrust roller bearings ntn standard class 0 class 6 class 5 class 4 table 2 spherical roller thrust bearings iso 199 class 0 table 4. Special bearings are available for the chain and mast guide, steel mill, rear wheel and pinion applications. Rolling element bearings are available in a variety of types, configurations, and sizes. To provide the highest levels of quality and customer service, these products are available worldwide through skf sales channels. Fullcomplement needle roller bearings 4 ntn needle roller bearing handbook 1. Ntn bearing competes with the biggest names in the bearing industry.
The choice of a special cage will depend on the particular bearing operating criteria. Main selection criteria for bearing size and related bearing ratings and safety factor. Pillow blocks, flanges, take up units and bearing inserts pillow block bearings, flange bearings and take up bearings consist of a housing with a bearing mounted in it. When special consideration is necessary, consult with ntn engineering. Bearing calculation when selecting an axlebox bearing or unit, skf should be contacted for assistance with necessary calculations. Basic calculation principles are mentioned in this chapter, to give an overview of. The history of rolling bearings goes back a long time, but.
Bearing types, applications, failures, selection, advantages. Life adjustment factor for operating conditions, a3. Other bearings can be engineered for special requirements. Skf uses cookies on our web site to align the information shown as closely as possible to the visitors preferences and to tailor our web site user experience in. The operating conditions life adjustment factor, a3, is.
Needle roller bearings with machined rings 4 8 7 1. Over the years, ntn has gained considerable expertise in bearings selection. Estimation of bearing internal preload at maximum speed and consideration about bearing initial clearance according to. Hub bearing selection order hub bearing selection flowchart. Ntn seal and shield type ball bearings are built to meet these trends. The allowable speeds listed in the bearing tables for grease and oil lubrication are for normal tolerance ntn bearings. Please, use our online bearing selection tool, skf bearing select, which has a fully updated, clean and userfriendly interface.
Consult ntn if your operating condition is not shown in the table. We have over 75 plants worldwide and over 100 years of premium quality to our name. Advanced selection table more detailed application information speed for ball bearings speed for roller bearings m medium30 to 110. This method can be applied where axial load is less than or equal to. Hr 32210 j j lubrication hole on the same side as the mounting screws or eccentric collar lock, example. Grease types a lithiumbased grease, whose base oil is mineral oil, is commonly used as a lubricant for rolling bearings, as. Founded in 1918 and headquartered in osaka, japan, ntn is a leading manufacturer of a comprehensive range of bearings, constant velocity joints, wheel hub assemblies, and other precision industrial and automotive components. In most cases, shaft diameter or the bearing bore diameter has been determined according to the machines other design specifications.
Roller bearings exhibit less elastic a 14 0bearing selection table 2. Selection of bearing type according to the direction and magnitude of loads the magnitude and direction of loads greatly influence the selection of bearings. Accordingly, a 2 1 is used for the life adjustment factor in formula 5. Which selection criteria you should use depends on the operating conditions of the bearing. The units are preassembled and adjusted at the factory. They simplify shaft design, are maintenancefree, and are the bearing of. Skf bearings catalogue pdf download skf bearing catalogue contains the standard assortment of skf rolling bearings typically used in industrial applications. Jul 11, 2012 this article helps mechanical engineers understand the selection of ball bearings depending upon the application and load conditions. They are available in a wide variety of materials, mounting configurations. Using variations of the life formulas and application information, it is possible to select bearings based on desired life, load applied, and shaft speed. Other causes of bearing failure are often attributed to problems such as seizing, abrasions, cracking, chipping, scuffing, rust, etc.
Bearing selection, and shaft and housing design ntn. Please consult ntn for advice and assistance with any bearing selection problem. Ball and roller bearings cad data of model numbers given in the catalog is available as an electronic catalog. Bearing arrangements and structures of bearings for main. Selection criteria procedure for bearing selection vertical turret lathes belong to the category of machine tools operating by cutting methods. Skf bearing select has been designed in alignment with the bearing selection process. Early failure is mostly attributable to inadequate handling or maintenance. When selecting the correct bearing for your application, it is important to consider several factors, and analyse in various means. Ntn rolling bearings are available in a variety of types, configurations, and sizes. For ntn cylindrical and tapered roller bearings which utilize case carburized steel, a2 1. Typically, ball bearings are usually specified on applications with lighter loads but have a higher speed capacity. The bearing arrangement type i to xii on the free or fix side is selected. Roller bearings exhibit less elastic deformation than ball bearings. Bearings may fail earlier than the expected rolling fatigue life.
Bearing selection is influenced by many factors such as loads, geometry, maintenance, available clearance, displacement, rotation, deflection, availability, policy, designer preference, construction tolerances and cost. Warranty ntn warrants, to the original purchaser only, that the delivered product which is the subject of this sale a will conform to drawings and specifications mutually established in writing as applicable to the contract, and b. The design and material variants are extensive and offer an unparalleled selection from which to meet your application needs. They simplify shaft design, are maintenancefree, and are the bearing of choice for an increasing number of applications. We manufacture and supply the most comprehensive range of bearings, constant velocity joints, and other precision industrial and automotive equipment to meet a variety of applications, across a variety of industries. Please refer to our catalogue for these bearing series codes. The most common bearing types and nomenclature of bearing parts are shown in fig. Browse deep groove ball bearings in the ntn bearing corp. Tdocd outer rings also are available in most sizes. Values for the limiting speed are listed in the bearing tables. Bearing selection an example of the procedure for selecting bearings is shown in the following flow chart. For applications exceeding this range, consult ntn engineering. However, these so called causes of bearing failure are usually themselves caused by improper installation, insufficient or improper lubrication, faulty sealing or inaccurate bearing selection. With snrs capacities and strength, ntn obtains a powerful ally in order to extend its activities worldwide.
In order to fulfil the relevant requirements, the bearing arrangement must have the appropriate characteristics. The process of selecting the most appropriate bearing for the application can seem overwhelming. J102020g mf miniature metric bearing with special dimensions and flanged outer ring mr. When selecting the correct bearing for your application. Handling of bearings deep groove ball bearings d 3 200 mm angular contact ball bearings d 10 200 mm selfaligning ball bearingsd 10 100 mm cylindrical roller bearings d 20 200 mm tapered roller bearings d 15 200 mm spherical roller bearings d 25 300 mm. Calculation results can be obtained fast and are presented directly near the required input data.
We urge our customers to take advantage of this service. Ntn provides rolling bearings hereinafter referred to as bearings of various types and dimensions. Primarily the article helps you calculate the minimum and maximum load bearing capacity of bearing and most importantly life of the bearing as an individual. Doublefractured r 2 r 1 r 1 r 1 d d d d d c c c b b b drawing a drawing cdrawing b d 150 1,400mm 150 200 190 240 315. F vh very high cp 10 temperature load 2 bearing operating. Table of contents ahr international ball bearings roller. The bearings with more rows of rolling elements, especially. To facilitate the selection process and to be able to select the most suitable bearing for the job, it is necessary to analyze the application requirements. For bearings constructed of specially improved materials or with special manufacturing methods, the life adjustment factor a 2. Ntn warrants, to the original purchaser only, that the delivered product which is the subject of this sale a. Oilimpregnated sintered bearings handbook ntn global. These tables should not be used as a method to select or design a bearing into an. Bearing selection flow chart basic procedure selection of bearing type and configuration dimensional limitations the allowable space for bearings is generally limited. Tdo bearings can be used in fixed locating positions or allowed to float in the housing bore, for example, to compensate for shaft expansion.
705 1154 1448 1394 921 1111 1659 503 1431 943 1657 687 1313 111 868 1644 898 232 1340 478 1466