Timken Tapered Roller Bearings
Single Row Bearing
Inch Single Row
Single-row tapered roller bearings are the most basic and widely used, consisting of a cone assembly and a cup. Timken patented the first in 1898 and today offers the world's widest variety in inch and metric sizes.
TS |
This is the most basic and most widely used type of tapered roller bearing. It consists of two main separable parts: the inner race assembly and the outer race. It is typically mounted in opposing pairs on a shaft. Size Range : ID 7.937 to 1562.100 mm (0.31225 to 61.5000 in.) OD 31.991 to 1806.575 mm (1.2595 to 71.1250 in.) Design Attributes : - Single cone and cup - One-piece pressed steel cage retains rollers on the cone and spaces them evenly - Pin type cages also available Applications : - Vehicle front wheels, Differential and pinion configurations, Conveyor rolls, Machine tool spindles, Trailer wheels |
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TSF (Flanged Cup) |
TSF bearings have flanged cups to facilitate axial location and accurately align seals in through-bored housings.
ID 7.937 mm to 1270.000 mm (0.3125 in. to 50.0000 in.) OD 31.991 mm to 1435.100 mm (1.2595 in. to 56.5000 in.) Design Attributes : - Cup is backed against flange face to allow housing to be through-bored. - Accurate alignment of housing bores. - Reduced machining costs. Applications : - Machine tool spindles, Gear reduction units, Automotive transaxles ,Transmissions |
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TSU (Unit-Bearing) |
TSU bearings are self-contained, unitized assemblies that carry heavy radial loads and can manage thrust loads in either direction.
ID 30.000 mm to 45.000 mm (1.811 in. to 1.7717 in.) OD 58.000 mm to 80.000 mm (2.2835 in. to 3.1496 in.) Design Attributes : - Self-contained, unitized assembly. - Manages heavy radial loads and thrust loads in either direction. Applications : - Automotive rear wheels, Transmissions, Gear reduction units, Industrial equipment |
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TSL bearings are similar to TS bearings, but feature DUO FACE-PLUS™ seals pressed onto the outside diameter of the cone rib.
ID 19.050 mm to 68.262 mm (0.7500 in. to 2.6875 in.) OD 45.237 mm to 110 mm (1.7810 in. to 4.3307 in.) Design Attributes : TS design with a seal pressed onto the cone rib OD. One seal lip operates in the housing bore while the other seals against the cup face. Applications : - Moderate- to low-speed automotive and industrial applications, Aircraft wheels, Farm implement wheels, Idler rollers, Side-delivery hay rakes |
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TSRB (Snap-ring cup) |
Size Range :
ID 22.225 mm to 117.475 mm (0.8750 in. to 4.6250 in.) OD 57.150 mm to 180.975 mm (2.2500 in. to 7.1250 in.) Design Attributes : - Basic TSF design with groove to accommodate a snap ring instead of flange. - Can be ordered with or without snap ring. Applications : - Machine tool spindles, Gear reduction units, Automotive transaxles, Transmissions |
Fuel Efficient Bearings |
At first glance, you may not be able to tell the difference between this tapered roller bearing and any other. Upon closer inspection, you’ll find Timken® fuel efficient bearings are lighter and thinner than their standard counterparts. From improved fuel economy to increased reliability, fuel efficient bearings offer exactly what you want to build a better axle system.
- Advanced tapered design results in a 30 percent reduction in power consumption and up to a two percent gain in vehicle fuel economy. - Power dense design reduces bearing weight by 10-15 percent. -Controlled set-up torque helps you achieve more accurate settings, resulting in the highest axle performance possible. Applications : Light and commercial vehicles (original equipment and aftermarket) |
454-Series™ Tapered Roller Bearings for Commercial Vehicles |
Engineered with performance-enhancing features for severe-duty applications, Timken® 454-SeriesTM wheel bearings help increase fuel efficiency, improve load-carrying capacity, fit in popular axle and hub designs – and simplify installation – helping you gain fleet uptime.
- As a leader in tapered roller bearing technology, we engineer bearings to outlast and outperform those frequently used on original equipment. Design Attributes : - Engineered steel: Manufactured with super-clean alloy steel, these long-lasting bearings are designed to meet severe-duty application requirements. - Precision profiles: Internal raceway profiles reduce stress on bearing components by distributing the loads evenly across contact surfaces – increasing load-carrying capacity. - Tight tolerances: Uniform internal geometry, including angle of contact for cones and rollers, creates a precise match between cup and cone – extending bearing life. - Enhanced surface finishes: Advanced finishing processes generate smoother surface finishes on races and rollers to reduce friction – helping increase fuel efficiency. - Flexibility: Engineered for severe-duty applications in any configuration – dual and wide singles – 454-Series wheel bearings maintain consistency and simplicity within fleets. - Compatibility: 454-Series wheel bearings fit popular axle and hub designs, allowing retrofit into existing equipment. Applications : - Commercial vehicles (original equipment and aftermarket) |
Set-Right® Commercial Vehicle Hub Rebuild Kits |
Engineered to help increase fuel efficiency and simplify installation, Timken® Set-Right® Commercial Vehicle Hub Rebuild Kits are available for severe duty, dual and wide single tire applications.
- Accurate Bearing Setting: Set-Right kits feature bearings that significantly reduce the width variation found in standard bearings. Our tight bearing width tolerance enables consistent and accurate bearing setting of pre-adjusted hubs. - Consistent Bearing Setting: Consistently achieve proper wheel bearing setting, avoiding the need for manual bearing adjustment and promoting optimum bearing and seal life. - Streamlined Inventory Management: With a wide range of part numbers, each kit features two Timken® MileMate® matched bearing sets and a precision-machined spacer (five common spacer types available). - More Uptime: MileMate bearings, manufactured with super-clean high-strength alloy steel, precision profiles and enhanced surface finishes, feature high load ratings, and outlast and outperform competitor bearings. Applications : - Commercial vehicles (aftermarket) |
MileMate Wheel Bearing Sets for Commercial Vehicles |
Engineered for superior performance and increased reliability, Timken® MileMate® matched cup and cone bearing sets help increase uptime. Precisely matched sets enable easier installation and bearings will distribute loads more evenly, extending bearing life.
- Engineered steel: Manufactured with super-clean alloy steel, these long-lasting bearings are designed to meet severe-duty application requirements. - Precision profiles: Internal raceway profiles reduce stress on bearing components by distributing the loads evenly across contact surfaces – increasing load-carrying capacity. - Tight tolerances: Uniform internal geometry, including angle of contact for cones and rollers, creates a precise match between cup and cone – extending bearing life. - Enhanced surface finishes: Advanced finishing processes generate smoother surface finishes on races and rollers to reduce friction – helping increase fuel efficiency. - Flexibility: Engineered for severe-duty applications in any configuration – dual and wide singles – to maintain consistency and simplicity within fleets. Engineered to also handle the 2-inch offset loads found in wide single-tire configurations. - Compatibility: Fits popular axle and hub designs, allowing retrofit into existing equipment. With 56 sets to choose from, it’s easy to find the right pair for the most popular applications, including manually adjusted and pre-adjusted wheel ends. - Easier Installation: Matched wheel bearing sets make it easier and faster to install bearings correctly every time. - Meets or exceed original equipment manufacturers’ specifications, including specifications for ConMet® PreSet® hubs and Spicer® LMS™ hubs. Applications : - Commercial vehicles (aftermarket) |
Metric Single Row
The company continues to extend its line of Timken® single row metric tapered roller bearings to respond to customer needs and today offers one of the industry's broadest ranges of metric parts.
Metric Single Row |
Known for having the widest range of inch single row tapered roller bearings, Timken also offers a wide range of popular metric single row tapered roller bearings in accordance with ISO 355:2007. Please see the Timken Metric Tapered Roller Bearings catalog below for product tables and part-numbering system information.
- Standard design bearings reflected in the catalog deliver long service life for a wide range of industrial and mobile applications. - Premium design bearings are available on many part numbers upon request to meet higher performance requirements for the most challenging applications. - Certain sizes are available with a flanged outer ring, facilitating accurate alignment of housing bores. - Two single-row metric matched bearing assemblies are also available for applications requiring higher load carrying capacity or where the shaft must be located axially in both directions with a specific axial clearance or preload. Applications : - Gear boxes, pumps and conveyors used in power gen, mining, oil and gas, wind energy, pulp and paper, food and beverage, gear drives, cement and metals applications. - Drive trains, gear drives, axle centers, wheel ends and transmissions used in construction, mining, rail, automotive and commercial vehicles. |
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Double Row Bearing
Inch Double Row
Double- or two-row Timken® tapered roller bearings feature double cups and two single cones. They are available in a variety of configurations for general industrial and automotive applications.
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TDI bearings have a one-piece double inner race and two single outer races and are typically supplied complete with an outer race spacer as a pre-set assembly. The bearing can be used at fixed positions on rotation shaft applications. For rotating housing application it can be used to float on the stationary shaft. TDI bearings are sometimes used on rotating shaft applications where a loose fit is required for ease of removal.
- ID 25.400 mm to 1200.150 mm (1.000 in. to 47.2500 in.) - OD 30.480 mm to 2460.000 mm (1.2000 in. to 96.8504 in.) Design Attributes : - Double cone and two single cups, with or without a cup spacer. - Furnished as a matched assembly. - Cups ground to fit. Applications : - Gear reduction units, Cranes, Calendar rolls, Industrial machinery |
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The configuration of the TDO provides a wide effective bearing spread, making it ideal for applications in which overturning moments are a significant load component. TDO bearings can be used in fixed positions or allowed to float in the housing bore.
Size range : - ID 25.400 mm to 1200.150 mm (1.0000 in. to 47.2500 in.) - OD 30.480 mm to 2460.000 mm (1.2000 in. to 96.8504 in.) Design Attributes : - Double cup and two single cones, with or without a spacer. - When spacers are used, bearing is furnished as a preset, matched assembly. - Cup features groove and lubrication holes in the OD. - Spacers available with or without lubricant grooves and holes. Applications : - Heavy-duty gear drives - Various industrial configurations |
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TNA bearings are similar to the TDO, but the inner race narrow faces are extended to abut and eliminate the need for a separate inner race spacer. Supplied with an in-built clearance to give a standard setting range, these bearings provide a solution for many fixed or floating bearing applications where simplicity of assembly is required.
- ID 25.400 mm to 1200.150 mm (1.0000 in. to 47.2500 in.) - OD 30.480 mm to 2460.000 mm (1.2000 in. to 96.8504 in.) Design Attributes : - Double cup and two single cones. - Internal bearing clearance controlled by extending the front faces of the cones so they contact each other. - SW variation features chamfers in the bores at the front faces of the two single cones to form a lubrication groove. - SE variation features a back face rib design to accommodate radial lip seals or stamped closure. Applications : - Sheaves, Crane sheaves, Oil-field drilling rig sheaves, Applications where two-row preset bearings are required |
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SR (Two-Row Non-Adjustable) |
SR bearings are made to a standard setting range, based on Timken’s Set-Right™ automated setting technique, and are suitable for most industrial applications. They have two spacers and an optional snap-ring for axial location. Because both types are made from popular sizes of single-row bearings, they provide a low-cost choice for many applications.
- ID 26.987 to 200.000 mm (1.0625 in. to 7.8740 in.) - OD 61.999 to 300.000 mm (2.4409 in. to 11.811 in.) Design Attributes : - Two TS bearings mounted indirectly with cone and cup spacers. - Cup spacer features lubrication slots to allow commercial snap rings to locate bearings axially. - Two J-Line™ Class N bearings with metric envelop and non-metric internal geometry. Applications : - Automotive configurations |
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2TS-IM (Spacer Assembly with Indirect Mounting) |
2TS-IM assemblies are comprised of two single-row bearings with an inner and outer ring spacer. In some applications, a shoulder in the bearing housing replaces the outer ring spacer.
- Steel spacers are used to create Bench End Play (BEP) or Preload (BPL) in the bearing assembly. - Available with or without spacers. - Spacers preset during manufacture. Applications : - Gear reduction units, Industrial machines |
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2TS-DM assemblies are comprised of two single-row bearings with abutting back facing inner rings and an outer ring spacer with lubricating holes is typical. These are generally used at fixed positions on rotating shaft applications.
- Two single row bearings, with or without a spacer. - When spacers are used, bearing is furnished as a preset, matched assembly. - Spacers available with or without lubricant grooves and holes. Applications : - Gear reduction units, Industrial machines |
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2TS-TM (Spacer Assembly with Tandem Mounting) |
Where combined radial and thrust load capacity is required, but the thrust component is exceptional and beyond the capacity of a single bearing (within a given maximum OD), two single-row bearings can be mounted in tandem. Appropriate inner and outer ring spacers are supplied.
Size range : 0 to 8 inches (Larger sizes available on request) Design Attributes : - Steel spacers are used to create Bench End Play (BEP) or Preload (BPL) in the bearing assembly. - Spacers preset during maintenance. Applications : Hydrostatic axial piston pumps and motors |
Metric Double Row
Timken features one of the industry's largest selections of metric tapered roller bearing matched assemblies. With industry standard part numbering, it's now easier to find the bearing you need.
Metric Double Row |
Timken metric tapered roller bearing matched assemblies consist of two single-row bearings with individually matched spacers that are set at the factory to pre-determined dimensions and tolerances. Matched bearing assemblies are used in applications requiring higher load carrying capacity or where the shaft must be located axially in both directions with a specific axial clearance or preload. Timken offers a wide range of sizes and configurations and follows industry standard part numbering system for easy interchanges. Please see the Timken Metric Tapered Roller Bearings Matched Bearing Assemblies catalog below for product tables and part-numbering system information.
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Four Row Bearing
Timken® four-row tapered roller bearings combine the inherent high-load radial/thrust capacity and direct/indirect mounting variables of tapered roller bearings into assemblies offering maximum load rating in minimum space.
TQO (Straight Bore Four-Row Assembly) |
TQO bearings are directly mounted and comprised of two double inner races, two single and one double outer race, with an inner race spacer and two outer race spacers. Slots in the inner race spacer permit lubricant to flow from the bearing chamber to the roll neck. The inner race spacers are hardened to minimize face wear.
Size range :- ID 50.800 mm to 1500.000 mm (2.0000 in. to 59.0551 in.) - OD 83.337 mm to 2032.000 mm (3.2810 in. to 80.0000 in.) Design Attributes :- Two double cones, two single cups and a double cup with a cone spacer and two cup spacers. - Spacers have slots or holes for lubrication. - Cone spacers are hardened to reduce face wear. - Numbered serially to assure correct installation sequence. Applications : - Low- and medium-speed rolling mills |
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TQOW (Straight Bore with Cone Face Lubrication Slots) |
TQOW bearings are similar to TQO bearings. When the fillet and/or filler rings do not already have lubrication slots, they are provided in the faces of the bearing inner race.
Size range :- ID 50.800 mm to 1499.872 mm (2.0000 to 59.0501 in.) - OD 83.337 mm to 2032.000 mm (3.2810 in. to 80.0000 in.) Design Attributes :- Similar to TQO, except that the cone faces have lubrication slots at each face. - Two double cones, two single cups and a double cup with a cone spacer and two cup spacers. - Cone spacers are hardened to reduce face wear. - Numbered serially to assure correct installation sequence. Applications : - Low- and medium-speed rolling mills |
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TQIT (Tapered Bore Four-Row Assembly) |
Type TQIT bearings have a tapered bore that is matched and continuous through the inner races. This allows for an interference fit on the backup rolls of high-speed mills, where a loose inner race fit of a straight bore bearing could cause excessive neck wear. The indirect mounting of the bearing pairs increases the overall effective spread of the bearing, providing optimum stability and roll rigidity.
Size range :- ID 123.022 mm to 1004.633 mm (4.8434 in. to 39.5525 in.) - OD 174.625 mm to 2032.000 mm (6.8750 mm to 80.0000 in.) Design Attributes :- Two tapered-bore single cones, one tapered-bore double cone, four single cups and three cup spacers. - Front faces of single cones and both faces of double cone are extended to contact each other. - Tapered cone bores are matched for continuous taper through the cones. - Lubrication delivered through three cup spacers. - Preset, matched assemblies, serial numbered to assure correct installation. Applications : - Roll necks of high-speed rolling mills |
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SRNB (Sealed Four-Row Bearing) |
Timken® sealed roll neck bearings provide strength where it counts for flat product rolling mills. Our premium quality four-row sealed bearings are designed to operate at high speeds and withstand harsh environments, even while carrying heavy loads.
Built with highly rated Timken® tapered roller bearings, our sealed roll neck bearings are expected to provide a lower cost of ownership due to less required maintenance and longer bearing life. Timken case-carburized, high-capacity tapered roller bearings offer durable toughness. The newest Timken sealed roll neck bearing is the integrated seal design that exemplifies our focus on advancing technology for the metals industry. Also available are the seal carrier design, many special designs and custom designs. Size range :- ID: 195.000 mm to 710.550 mm (7.6772 in. to 28.2500 in.) - OD: 270.000 to 946.150 mm (10.6300in. to 37.2500 in.) Design Attributes :- Four single cups for optimum load sharing. - Cup spacers available with or without lube groove and holes. - Improved surface finishes to enhance lubrication performance. - Inboard and outboard cone face slots that reduce cone face wear. - Spiral bore grooves with blended radii to eliminate roll neck damage. - Case-carburized components to improve toughness and increase fatigue life. - Patented seal designs with improved contact geometry for enhanced sealing. - Enhanced roller profiling for even load distribution, which reduces edge stress. - No central cone or cup spacers to minimize number of components to be handled. - Effective sealing at cup outer diameter (OD) to seal contaminants away from bearing OD and chock bore. Applications :- Rolling mills |
Integrated Bearing Assemblies
Timken® integrated bearing assemblies are the result of our collaborations with customers to design, engineer and test a continuous stream of next-generation solutions, including AP-2™ bearings for rail applications..