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RKB double row taper roller bearings can take up heavy loads.
The basic styles are two row converging TDI configuration and two row diverging TDO configuration.
RKB bearings in TDI configuration have a double cone assembly and two single cups and they are generally supplied with a cup spacer.
The cup spacer is face ground after accurate measurement of the distance to obtain a predetermined internal play. Spacers or components may not be interchanged.
RKB also produces the taper roller steep contact angle TDIS version with higher thrust capacity than the TDI type.
These TDIS bearings have combination of face slots (e.g. N, N1, N2) and bore key-way for locking the cone on the shaft.
Also helical groove in the bore and lubrication grooves in side faces of double cone and/or retention sleeve with annular groove and lubrication holes can be provided.
RKB bearings in TDO configuration have a double cup, two single cone assemblies and can be supplied with a shaft supported cone spacer.
The TDO style bearings are mainly used in a floating cup mounting. Additional features of a lubrication groove and oil holes in the double cup for simplified lubrication through the outer ring are included (suffix CD).
In the TDO type the contact angle diverges, so the rigidity of the shaft mounting is increased.
Bearing sets with steep contact angle and intermediate ring, pierced rollers and steel pin-type cage (TDOS design), bearing sets with extended inner rings which abut each other (TDONA and TDONASW designs), bearing sets with heavy wall cup (TNASWH design) and bearing sets with shields of pressed steel (TDO 4422 design) are also in RKB manufacturing program. |
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RKB four row taper roller bearings are installed as complete assemblies and take axial loads in addition to heavy radial loads.
For quick roll changes, they have a loose fit on the roll necks, but there is the disadvantage that the inner rings wander on their seatings causing wear. To reduce these negative effects they have a helical groov.
RKB produces these bearings in two base designs, TQO and TQI configuration.
The TQO type is composed in its standard configuration of two double cone assemblies, one central double cup, two single cups and factory adjusted cup and cone spacers.
Lubrication grooves and oil holes are provided.
The TQI type is composed in its standard configuration of one double cone assembly, two single cone assemblies and two double cups.
A four separated individual single cups configuration is also available.
It is also available the version with tapered bore (designation TQIT and TQITE).
In RKB sealed TQOS type sets, they have been developed to improve the lubrication in service.
The seals are produced in several designs depending on bearing size and application needs; the most common are the integrated lateral unitized seals (european version), the integrated lateral narrow seals (compact seal concept) and the loose flange lateral unitized seals (japanese version).
RKB seals have been redesigned in new type to increase seal durability and efficiency: these seals optimize the available space.
Phosphate treatment for rings, rollers and spacers (suffix PT4) is also available.
RKB produces special executions of TQO made of four single cups and two double cone assemblies (design without spacers). |
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RKB multi row have low cross section, high load carrying capacity, stiffness and are used for metal rolling equipment in mills.
They are of separable design that considerably simplifies mounting, maintenance and inspection.
They can tolerate moderate to high shaft speeds. The rollers and outer races are carefully matched to ensure the best load distribution.
Inner rings (designation L) are interchangeable with other assemblies (designation R).
They have cylindrical bore and some sizes are also available with tapered bore.
The use of them in metal rolling mills exposes them to very heavy stresses.The rings and rollers can be manufactured with very high quality case hardened carburizing alloy steels. Deep case depth and special heat treatment ensure superior size stability, fracture toughness and reliability.
Where the bearings are mounted with a loose fit on the roll neck, RKB multi row cylindrical roller bearings have C2 internal radial clearance and are supplied with a helical groove in the bore and/or lubrication grooves in the side faces of the bearing rings for the efficient lubrication (e.g. suffix AC).
RKB produces the multi row cylindrical roller bearings in several construction.
The various designs differ basically in the number of inner and outer rings, in the number of loose or integral flanges on the outer ring, in the cage type, in the number of rollers in the cage pocket.
Furthermore, on order RKB can produce the bearings sealed at both sides by radial rubbing seals or with wider inner ring.
They are produced with the normal precision grade for roll neck bearings, conform to class P6 for dimensional and running accuracy to ISO 492. |
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Description
Durable twin row tapered roller bearing with spring locking collar and variety of mounting styles.
Features/Benefits
Reduced length through bore allows installation in tight spots. Split cast iron housing with replacement bearing insert units available. Self-aligning.
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Self-Aligning Tapered Roller Bearing
Offers Important User Benefits
Cost Reduction!
Advantages Not Found in One-Piece Housing |
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Track rollers are self-retaining, single or double row units with particularly thick-walled outer rings. These bearings can support axial forces in both directions as well as high radial forces. The bearing outer rings have a crowned or cylindrical outside surface. Designs with a crowned outside surface are used where there is misalignment in relation to the raceway and edge stresses must be avoided. The track rollers are available with an inner ring, with a stud and with a plastic tyre on the outer ring.
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YTGW Guide Wheels are the main components of the Linear Motion system, they can be widely used in the industrial robot, cutting machine, motion track, production flow and so on.
The surface of outer ring is the "W" profile formed by the two "V" with an angle of 90 degrees. The internal or external side face can be matched separately with the concave or protrudable track that both have a "V' profile with the angle of 90 degrees, and also the internal side face can be matched well with the cylindrical track.
Wheels feature the internal design of double row angular contact ball bearing and a thick-walled outer ring, so the wheels can accommodate higher loads.
Wheels are made of the high-quality bearing steel, processed by heat treatment and precision grind, and are filled with a long service life, high-grade and multi-purposes grease. Wheels mantle the metal shield or rubber seal (suffix X) to prevent the dust. YITONG also can provide the wheels with the concentric or eccentric bushings, as well as the wheels made from the corrosion resistance stainless steel.
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Wire Guides and Straightening Rollers - type A or AT
Field of Application :
The straightening of cables, strips and wires is performed in steps with successive stages until the final product is obtained. To rationalize the handling between the different steps the material is stocked on reels or on bobbins and takes forms which are not natural.
For every production step, it is therefore necessary to carry out the inverse process by taking the material off its support. At that moment, the straightening operation takes place. It may be divided into three steps:
The straightening, consisting of putting the material back into its original shape. The operation is carried out by the first straightening rollers.
The removal of the residual constraint in the material, due to the winding on the bobbin. This operation is performed by the rollers located in the central part of the straightener.
The forming of the wire carried out by the last rollers on the straightener, generally placed at an angle of 90°compared to the angle of the first rollers.
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Track rollers with Gothic arch groove - type SG
The function of series SG rollers is same as the series LFR rollers. But they are mainly used in the flat track and in the condition required compact structure. After rollers are installed to the slider, the shaft will be not or seldom over the roller's side planes. |
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| The Diabolo rollers are special arranged in the meat hook that running on a long tubular rail in the Abattoirs. These rollers feature to accept high carrying loads and to have long service life. The rollers have different hardness in external profile surface and internal structure so that the rails are prevented from wear in operation. These rollers are filled with high-grade grease which can run in the range - 40°C to + 180°C with waterproof & anti-washing function. |
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Linear roller bearings are suitable in conjunction with guideways for locating/locating or locating/non-locating bearing arrangements and form a bearing arrangement system for linear motion with unlimited stroke length. In closed arrangements, they can support loads from all directions and moments about all axes. Their load carrying capacity is extremely high and the space required is very small. The guidance systems can be preloaded by adjusting gibs and have extremely high rigidity when preloaded.
Since the guidance elements have a versatile range of possible arrangements, linear recirculating roller guidance systems are suitable for numerous applications in general machine building, especially for linear guidance systems in machine tools where high guidance and positioning accuracies are required over long traverse distances.
The range is supplemented by adjusting gibs for precise setting of the preload, setting devices for measuring the deformation of the adjacent construction where preload forces must be supported and adapters for easy mounting of the linear roller bearings in a 45° arrangement.
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