โดย admin | ม.ค. 12, 2016 | Roller bearings
Tapered roller bearings have tapered inner and outer ring raceways and tapered rollers. They are designed to accommodate combined loads, i.e. simultaneously acting radial and axial loads.
Single row tapered roller bearings
The SKF standard assortment of single row tapered roller bearings comprises popular sizes of metric single row tapered roller bearings in accordance with ISO 355:2007 and inch bearings in accordance with ANSI/ABMA Standard 19.2-2013.
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Double row tapered roller bearings
Double row tapered roller bearings can carry heavy loads and are stiff. They are suitable for the accommodation of combined (radial and axial) loads and can locate a shaft axially in both directions with a given axial clearance or a given preload. Their main use is in gearboxes, hoisting equipment, rolling mills and machines used in the mining industry, e.g. tunnelling machines.
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Four-row tapered roller bearings
Four-row tapered roller bearings are used successfully worldwide for rolling mill bearing arrangements where rolling speeds are slow to moderate. Because of their design they are able to take up those axial loads which occur in such applications in addition to radial loads and generally no separate thrust bearings are required in such arrangements.
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โดย admin | ม.ค. 12, 2016 | Roller bearings
SKF needle roller bearings are bearings with cylindrical rollers that are small in diameter relative to their length. The ends of the rollers are relieved slightly to modify the line contact between the rollers and raceways.
Needle roller and cage assemblies
SKF needle roller and cage assemblies are ready-to-mount, self-contained bearings. They are an excellent choice for applications that require a very rigid bearing arrangement as well as a high load carrying capacity.
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Drawn cup needle roller bearings
SKF drawn cup needle roller bearings have a deep drawn, thin-walled outer ring. They are characterized by a very low sectional height and high load carrying capacity.
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Needle roller bearings with machined rings
SKF needle roller bearings with machined rings are made of carbon chromium bearing steel. Relative to their low sectional height, they have a high load carrying capacity.
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Alignment needle roller bearings
SKF alignment needle roller bearings have an outer ring with a sphered (convex) outside surface. Two polymer seating rings with a sphered (concave) inside surface are encased in a drawn sheet steel sleeve and fitted over the outer ring.
Universal joint bearings
SKF manufactures these bearings with a cold forged or machined cup needle roller bearings with a closed end for different applications.
Needle roller bearing components
Needle roller bearing inner rings
SKF supplies inner rings for needle roller bearings separately. They are typically combined with needle roller and cage assemblies or drawn cup needle roller bearings in applications where the shaft cannot be hardened and ground.
SKF needle rollers are made of carbon chromium steel. The rollers have a hardness of 58 to 65 HRC and have a precision ground surface. They can be used to design full complement bearing arrangements for slow-speed or oscillating applications.
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Combined needle roller bearings
SKF combined needle roller bearings consist of a radial needle roller bearing combined with a thrust bearing. They can accommodate both radial and axial loads. Combined needle roller bearings provide the means to design locating bearing arrangements where radial space is limited.
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Needle roller thrust bearings
SKF needle roller thrust bearings are fitted with a form-stable cage to reliably retain and guide a large number of needle rollers. The very small diameter deviation of the rollers within one assembly enables these bearings to accommodate heavy axial loads and shock loads.
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Track runner bearings
Track runner bearings are designed to run on all types of tracks and to be used in cam drives, conveyor systems, etc. These bearings have a thick-walled outer ring, which enables them to accommodate high radial loads, while reducing distortion and bending stresses.
โดย admin | ม.ค. 12, 2016 | Roller bearings
SKF cylindrical roller bearings are available in many designs, series and sizes. The majority are single row bearings with a cage. High-capacity bearings, double row bearings, multi-row bearings, single, double and multi-row full complement bearings (without a cage) and split bearings complete the SKF standard assortment provided here.
Single row cylindrical roller bearings
Single row cylindrical roller bearings are separable i.e. the bearing ring with the roller and cage assembly can be separated from the other ring.
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Double row cylindrical roller bearings
Double row cylindrical roller bearings have a low cross section, high load carrying capacity and high stiffness. Therefore they are mainly used in machine tools, rolling mill stands, plastic calenders, grinding mills and also large gearboxes.
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Multi-row cylindrical roller bearings
The low bearing cross section allows for relatively large roll neck diameters in comparison with the roll diameter. Since very many rollers can be incorporated, the radial load carrying capacity is exceptionally high.
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Single row full complement cylindrical roller bearings
The basic SKF assortment of single row full complement cylindrical roller bearings provided here includes NCF and NJG design bearings. They are used to locate the shaft axially in one direction and eventually to accommodate axial displacement of the shaft relative to the housing in the opposite direction.
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Double row full complement cylindrical roller bearings
The basic SKF assortment of double row full complement cylindrical roller bearings provided here includes NNCL , NNCF and NNC open design bearings, as well as sealed NNF design bearings.
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Multi-row full complement cylindrical roller bearings
Multi-row full complement cylindrical roller bearings are mainly used in small cold rolling mills where very considerable rolling forces occur but where rolling speed is limited. Other applications for these bearings include straightening machines, shears and extruders.
โดย admin | ม.ค. 12, 2016 | Ball bearings
SKF thrust ball bearings are manufactured as single direction or double direction thrust ball bearings. They are designed to accommodate axial loads only and must not be subjected to any radial load.
Single direction thrust ball bearings
SKF single direction thrust ball bearings consist of a shaft washer, a housing washer and a ball and cage assembly.
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Double direction thrust ball bearings
SKF double direction thrust ball bearings consist of one shaft washer, two housing washers and two ball and cage assemblies.
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โดย admin | ม.ค. 12, 2016 | Ball bearings
Angular contact ball bearings have raceways in the inner and outer rings that are displaced relative to each other in the direction of the bearing axis. This means that they are designed to accommodate combined loads, i.e. simultaneously acting radial and axial loads.
Single row angular contact ball bearings
SKF single row angular contact ball bearings can accommodate axial loads in one direction only. A single row bearing is typically adjusted against a second bearing.
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Double row angular contact ball bearings
SKF double row angular contact ball bearings correspond in design to two single row angular contact ball bearings arranged back-to-back, but take up less axial space.
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Four-point contact ball bearings
Four-point contact ball bearings are radial single row angular contact ball bearings with raceways that are designed to support axial loads in both directions.
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