Name: Rolling Bearings and Plain Bearings - UMS
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Ball Bearings

Angular Contact Ball Bearings

Single-row angular contact ball bearings are self-retaining units with solid inner and outer rings and ball and cage assemblies with polyamide, sheet metal or brass cages. The raceways of the inner and outer rings are offset from each other along the bearing axis. The bearings are available in open and sealed designs. Their angular adjustment facility is very limited.

Double-row angular contact ball bearings can support axial loads in both directions and high radial loads. They are particularly suitable for bearing arrangements in which rigid axial guidance is required.

For other product variants of angular contact ball bearings information, click this link: https://www.schaeffler.de/content.schaeffler.de/en/products-and-solutions/industrial/product-portfolio/rolling_and_plain_bearings/angular_contact_ball_bearings/index.jsp

Deep Groove Ball Bearing by FAG

FAG deep groove ball bearings are available in radial and axial designs for many different variants.

Single-row deep groove ball bearings are available in open and sealed designs. They are designed for high to very high speeds and can accommodate radial as well as axial forces.

Double-row deep groove ball bearings correspond with single-row deep groove ball bearings in design and are used when the radial load capacity of single-row deep groove ball bearings is insufficient.

FAG axial deep groove ball bearings are available in single or double-direction design variants. These bearings are especially well suited to high axial loads.

For other product variants of deep groove ball bearings information, click this link: https://www.schaeffler.de/content.schaeffler.de/en/products-and-solutions/industrial/product-portfolio/rolling_and_plain_bearings/deep_groove_ball_bearing/index.jsp

Four-Point Contact Ball Bearings

Four-point contact bearings are single-row angular contact ball bearings and therefore require significantly less space in an axial direction than double-row designs.

The bearings comprise solid outer rings, split inner rings and ball and cage assemblies with brass or polyamide cages. The two-piece inner rings enable a large complement of balls to be accommodated. The inner ring halves are matched to the particular bearing and must not be interchanged with those of other bearings of the same size. The outer ring with the ball and cage assembly can be mounted separately from the two inner ring halves.

Self-Aligning Ball Bearings

Self-aligning ball bearings are double row, self-retaining units comprising outer rings with a concave raceway, inner rings with a cylindrical or tapered bore and ball and cage assemblies. The bearings are available in open and sealed designs.

Spindle Bearings

Spindle bearings are single-row angular contact ball bearings comprising solid inner and outer rings and ball and cage assemblies with solid window cages. They cannot be dismantled. The bearings are available in open and sealed designs.

Spindle bearings have restricted tolerances. They are particularly suitable for bearing arrangements with very high requirements for guidance accuracy and suitability for high speeds. They have proven ideal for spindle bearing arrangements in machine tools.

For other product variants information, click this link: https://www.schaeffler.de/content.schaeffler.de/en/products-and-solutions/industrial/product-portfolio/rolling_and_plain_bearings/spindle_bearings/index.jsp

Thin Section Bearings

Thin-section bearings are high-precision products with very little running noise and a high load-carrying capacity. These bearings are available in three different designs with extremely small, predominantly square cross-sections. Within each series, the cross-section remains constant even in the case of larger shaft and housing bore diameters. The bearings are therefore also described as constant section (CS) bearings. This feature distinguishes thin section bearings from the conventional bearings that are described in standardized ISO series.

In this way, a larger cross-section can be selected in a graduated manner and, thus, a bearing with high load-carrying capacity can be used without the need to increase the shaft diameter. Thin-section bearings can be used to achieve extremely light and compact designs.

Thin-section bearings are available as deep groove ball bearings, four-point contact bearings and as angular contact ball bearings. Each of these designs is available in various series. The series correspond to the cross-section sizes. The balls are matched to the series.

Roller Bearings

Barrel Roller Bearings

Barrel roller bearings are single-row, self-aligning roller bearings. They comprise solid outer rings with a concave raceway, solid inner rings with two ribs and a cylindrical or tapered bore as well as barrel rollers with cages. The bearings cannot be dismantled.

Barrel roller bearings are particularly suitable where high radial shock type loads occur and misalignments must be compensated; see section on compensation of angular misalignments. They have only a low axial load-carrying capacity.

Cylindrical Roller Bearings

Single-row cylindrical roller bearings with cage are units comprising solid inner and outer rings and cylindrical roller and cage assemblies. The outer rings have rigid ribs on both sides or no ribs, and the inner rings have one or two rigid ribs or are designed without ribs. The cage prevents the cylindrical rollers from coming into contact with each other during rolling. Cylindrical roller bearings can be supplied with or without a cage

Optimized rib contact

“Classic” cylindrical roller bearings have extremely high radial load-carrying capacity and high rigidity. In addition to high radial loads, cylindrical roller bearings can also support axial loads if they are used as semi-locating or locating bearings. Whereas radial loads are transferred via the raceways, axial loads are transferred via the rolling element end faces and ribs, which, of course, limits the axial load. This is precisely where Schaeffler gets to work! Click this link for more information: https://www.schaeffler.de/content.schaeffler.de/en/products-and-solutions/industrial/product-portfolio/rolling_and_plain_bearings/cylindrical_roller_bearings_optimized_rib_contact/index.jsp

Needle Roller Bearings by INA

Needle roller bearings have a long track record as proven machine elements for the design of radially compact bearing arrangements with very high load-carrying capacity. In X-life configuration, they now have an up to 50 % longer service life.

For other product variants of needle roller bearings information, click this link: https://www.schaeffler.de/content.schaeffler.de/en/products-and-solutions/industrial/product-portfolio/rolling_and_plain_bearings/needle_roller_bearings/index.jsp

Spherical Roller Bearings

Delivering an outstanding performance: Spherical roller bearings are designed for systems in which high loads must be supported and shaft flexing and misalignments compensated. They deliver extremely high performance and are designed to carry extreme loads

The decades of experience our engineers have gathered combined with innovative ideas improve our spherical roller bearings even further. As a matter of fact, our quest for perfection in development and production ensures optimum kinematics and low wear, which increases the service life even more. And that comes at a low maintenance outlay and minimum maintenance costs.

For other product variants, click this link: https://www.schaeffler.de/content.schaeffler.de/en/products-and-solutions/industrial/product-portfolio/rolling_and_plain_bearings/spherical_roller_bearings/index.jsp

Tapered Roller Bearings by FAG

FAG tapered roller bearings can support high radial and axial loads. They have a broad range of speeds. They are efficient at supporting forces and ensure a precise and rigid shaft guidance system due to the large effective distance between the bearings. Tapered roller bearings can be adjusted and dismantled, which makes mounting easy.

Tapered roller bearings in X-life quality – reliable and energy efficient with a high load-carrying capacity

Numerous FAG tapered roller bearing series are available in X-life quality. In order to fulfil the requirements of X-life, the geometry, surfaces, dimensional and running accuracy, and the material and heat treatment process were all optimized. FAG tapered roller bearings in X-life quality increase the overall efficiency of your machines and equipment.

For other product variants of tapered roller bearings, click this link: https://www.schaeffler.de/content.schaeffler.de/en/products-and-solutions/industrial/product-portfolio/rolling_and_plain_bearings/tapered_roller_bearings/index.jsp

Other Rolling Bearings

Bearings for Screw Drives

Screw drive bearing arrangements are subjected to requirements that often cannot be optimally fulfilled by the design construction of conventional bearings. In order to configure bearing arrangements for the highly dynamic operating conditions in screw drives with high accuracy, high load-carrying capacity, high rigidity, low friction, easy fit and maintenance-free or low-maintenance design, INA/FAG has a wide range of axial angular contact ball bearings. With this well thought-out product range, ideal application-specific solutions can now be found for all the technical and economic demands placed on the bearing arrangements of screw drives.

Crossed Roller Bearing

Crossed-roller bearings are bearings for high-precision applications whose dimensions conform to ISO dimension series 18 as per DIN 616. They comprise outer rings, inner rings, rolling elements and plastic spacers. The outer ring is split and is held together by three retaining rings.

Due to the X arrangement of the cylindrical rollers, these bearings can support axial forces from both directions as well as radial forces, tilting moment loads and any combination of loads by means of a single bearing position. As a result, designs involving two bearing positions can be reduced to a single bearing position. Crossed roller bearings are very rigid, have high running accuracy and are supplied with normal clearance, low clearance or preload. The bearing outer rings are easily fixed to the adjacent construction using clamping rings.

Rotary Table Bearings

Axial-radial bearings are double-direction axial bearings for screw mounting with a radial guidance bearing. These ready-to-fit, pregreased units are very rigid, have high load-carrying capacity and operate with particularly high accuracy. They can support radial forces, axial forces from both directions and tilting moments free from clearance. ZKLDF axial angular contact ball bearings are low-friction, ready-to-fit, greased bearing units with high accuracy for very high speeds, high axial and radial loads and high demands on tilting rigidity. Axial-radial bearings with angular measuring system YRTM and YRTSM correspond in mechanical terms to series YRT and YRTS but are additionally fitted with an angular measuring system.

Slewing Rings

INA slewing rings are known worldwide as premium products in the field of rolling bearing technology. These machine elements have proven themselves many times over; they have high load carrying capacity, a versatile range of applications and are highly cost-effective. Due to their design, a single bearing can reliably support radial, axial and tilting moment loads. It is therefore possible in many cases to replace bearing arrangements comprising a combination of radial and axial bearings by a single bearing. This reduces ─ in some cases considerably ─ the costs and work required in the design of the adjacent construction and the fitting of bearings.

Slewing rings are sealed on both sides, lubricated with a high-quality grease, can be relubricated via lubrication nipples and are particularly easy to fit. The bearing rings are supplied without gear teeth or, in order to achieve simple drive solutions, are available with external or internal gear teeth.

INA slewing rings are designed as four-point contact bearings and as Crossed roller bearing.

Track Rollers, Backup Rollers and Cam Rollers

Ball bearing track rollers are self-retaining, single or double-row ball bearings with particularly thick-walled outer rings. In addition to high radial forces, these bearings can also support axial forces in both directions.

Yoke-type track rollers are single or double-row units mounted on shafts or studs. They comprise thick-walled outer rings with a profiled outside surface and needle roller and cage assemblies or full-complement rolling element sets.

Cam rollers are similar in their construction to single and double-row support rollers, except that the raceway is formed by a heavy-section roller stud with a fixing thread and lubrication hole.

Radial Insert Ball Bearings and Housing Units

Belt Tension Pulleys

Idler pulley units are tensioning systems for belt drives and idler units.

The ready-to-fit units comprise deep drawn, profiled sheet steel pulley halves riveted together and deep groove ball bearings. Pulleys of larger diameters are additionally welded together. A lead chamfer on the pulley profile prevents damage to the belt. Due to the sheet steel construction, the additional rotating masses and the out-of-balance masses generated are low.

Type A is suitable for V-belts, type B for flat, V and round belts, type D for round belts, steel cables and hemp ropes.

Housing Units

Radial insert ball bearings and housing units are robust, ready-to-fit machine elements for the design of economical bearing arrangements. These products have proven effective over many years and are available in many different series. They predominantly comprise a radial insert ball bearing fitted in a housing.

The bore of the housing and the outer ring of the bearing have a spherical profile and are matched to each other. This adjusts the bearing ring in the housing for static shaft misalignments. Thanks to its special mounting type ─ primarily eccentric locking collars or grub screws ─ the radial insert ball bearings are easy to affix onto the shaft. They are particularly easy to fit when they are used in combination with drawn shafts.

The radial insert ball bearings are fitted with multi-piece seals that effectively protect the rolling element set against contamination and moisture, even under difficult and critical operating conditions. Schaeffler offers a wide variety of housing units with radial insert ball bearings. Radial insert ball bearings are based on single-row deep groove ball bearings.

Radial Insert Ball Bearings

Radial insert ball bearings are single-row, ready-to-fit units comprising a solid outer ring, an inner ring extended on one or both sides, cages made from plastic or sheet steel and seals of type P, R, L or T. Bearings with an inner ring extended on both sides undergo less tilting of the inner ring and therefore run more smoothly.

The outer ring has a spherical or cylindrical outside surface. In combination with an INA housing matched to the design, bearings with a spherical outside surface can compensate for misalignment of the shaft; see Compensation of misalignments.

They are located on the shaft by means of eccentric locking collars, grub screws in the inner ring, adapter sleeves, drive slots or fit. Radial insert ball bearings are particularly easy to fit and are suitable for drawn shafts of grades h6 to h9 and can be relubricated with only a few exceptions.

Some series with eccentric locking collar or grub screws in the inner ring are also available with inch size bore dimensions.

Roller Chain Idler Sprocket Units

INA roller chain idler sprocket units are guidance and return units for roller bush chains and roller chains. They can compensate for chain stretch resulting from operation and provide smoother system running under high loads and speeds.

The ready-to-fit units comprise sprockets and deep groove ball bearings. The sprockets are made from high-strength steel, sintered iron or plastic (polyamide). Sprockets made from plastic offer particularly smooth running and generate very little noise. Since the inner ring of the deep groove ball bearing is extended on both sides, no additional spacer rings are required.

In series KSR..B0, the inner ring is located on the shaft by means of a locking collar. The bearing bore of this series has a plus tolerance. As a result, unmachined shafts up to ISO tolerance h9 can be used under moderate loads and speeds.

Bearing Housings

Bearing Housing

FAG standard housings encompass split and unsplit plummer block housing designs. With split plummer block housing designs, the upper part of the housing can be removed. This greatly simplifies assembly and maintenance. Unsplit plummer block housings are used in applications that place extremely high demands on bearings.

For other product variants of bearing housing information, click this link: https://www.schaeffler.de/content.schaeffler.de/en/products-and-solutions/industrial/product-portfolio/rolling_and_plain_bearings/bearing_housings/index.jsp

Plain Bearings

Maintenance-Free Plain Bearings

Schaeffler offers a comprehensive catalogue of maintenance-free plain bearings. Innovative plain bearing materials are used here, such as ELGOGLIDE, ELGOTEX, and the metal-polymer composite E40. These PTFE plain bearing materials enable ultra-low coefficients of friction for spherical plain bearings and rod ends as well as bushes, washers and strips while ensuring low wear and very long-life cycles. Maintenance-free plain bearings considerably reduce lubricant and maintenance costs as they do not require any oil or grease while also being very environmentally friendly.

Plain Bearings – Special Solutions

FAG are constantly developing new solutions which are subsequently offered as catalogue products. These are often ready-to-fit components or complete assemblies.

The surrounding construction is taken into consideration from the very beginning of the development process so that expensive changes to the adjacent construction are no longer necessary and the overall solution is cost-effective for the customer.

Plain Bearings Requiring Maintenance

Plain bearing and rod end designs that require maintenance with steel/steel and steel/bronze material pairs are easy to maintain, cost effective, and excellently suited to alternating loads. Plain bushes, washers, and strips employ the low-maintenance metal-polymer composite E50. The sliding layer features lubricant pockets, which means that an initial lubrication is sufficient in most cases.