ISO 9001:2015

Roller Bearings

Tapered Roller Bearing

Name: Tapered Roller Bearing
Brand: ANDE Bearing
Availability: InStock

Designed to handle combined radial and axial loads with tapered raceways for heavy-duty applications.

Type

Single Row Tapered Roller Bearing

Bore Diameter

15 mm - 300 mm

Outer Diameter

35 mm - 540 mm

Width

12 mm - 140 mm

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Technical Overview

Tapered Roller Bearings handle combined radial and axial loads simultaneously. The tapered design creates line contact between rollers and raceways, providing high load capacity and excellent resistance to axial forces.

Key Features

High combined load capacity (radial + axial)

Excellent shock load resistance

Adjustable clearance for precision applications

Available in single, double, and four-row configurations

Operating temperature: -40C to +150C

Technical Specifications

PropertyValue

TypeSingle Row Tapered Roller Bearing

Bore Diameter15 mm - 300 mm

Outer Diameter35 mm - 540 mm

Width12 mm - 140 mm

MaterialCase-hardened bearing steel / Through-hardened steel

Cage TypePressed steel / Machined brass

Precision ClassP5 standard, P4/P2 available

Speed RatingUp to 5,000 RPM (size dependent)

Dynamic Load Rating14 kN - 1,700 kN

Static Load Rating10.6 kN - 3,000 kN

Seal OptionsOpen / Sealed configurations available

StandardsISO 355, ISO 492

Applications

Automotive wheel hubs and axle assemblies

Gearboxes and power transmissions

Rolling mill work rolls and backup rolls

Machine tool spindles

Designation & Suffix Decoder

Metric tapered roller bearings follow ISO 355 with a 5-digit base number plus suffix letters describing tolerance, contact angle, internal design and special features. Inch-series bearings follow the Timken designation system (e.g. JM207049/JM207010 = cone/cup). The most common suffixes used at quotation are below.

Suffix / Code	Meaning	Engineering notes
30200 / 30300	ISO 355 dimension series prefix	Light (302xx) and heavy (303xx) section, contact angle ~12°. Use 303xx when axial capacity at the same bore is the deciding factor.
32200 / 32300	Wide variant of 30200 / 30300	Higher load rating and longer bearing width T at the same bore/OD; preferred for vehicle hubs and gearbox output shafts.
32900	Low-section series	Slim cross-section for compact gearbox positions and machine tool spindles where radial space is limited.
B	Increased contact angle	Steeper cup angle (typically 25–28°) for higher axial capacity; applied as suffix on selected ISO 355 sizes.
X	ISO 355 redesigned to original dimension series	Boundary dimensions match the original Timken / SKF reference; used when an existing size code must remain interchangeable after a design update.
J / JM / HM / LM / M / NA	Inch-series cone/cup prefix (Timken-pattern)	Quoted as matched cone-and-cup pair, e.g. JLM104948/JLM104910. ANDE manufactures the popular ranges as direct interchanges.
TDO	Two-row, double-cup, single-cone-each-side	Pre-set bidirectional thrust capacity in a compact envelope; common on automotive wheel ends and idler positions.
TDI	Two-row, double-cone, single-cup	Used where the inner ring rotates with a tight shaft fit; common on roll-stand chocks and crane wheels.
TNA	Four-row tapered roller bearing assembly	Self-contained four-row unit for rolling mill work rolls and backup rolls; supplied with matched components.
C2 / CN / C3 / C4	Radial internal clearance class (ISO 5753-1)	CN is normal; C3 / C4 are larger for hot service or heavy interference fit. See clearance table below.
P0 / P6 / P5 / P4 / P2	Tolerance / precision class per ISO 492	P0 (normal) is standard; P5 and tighter are used for machine tool spindles and other high-rotation positions.
S0 / S1 / S2	Heat-stabilised	Dimensionally stable up to +150 °C / +200 °C / +250 °C respectively; specified for rolling mill chocks and continuous-caster service.
GR	Pre-greased / pre-lubricated	Sealed cone-and-cup pair shipped with starting grease charge; applied to TDO/TDI hub units and pre-set wheel-end packages.

Internal Clearance Classes (ISO 5753-1)

Tapered roller bearings are normally adjusted at mounting rather than running on a fixed pre-set clearance — but pre-set TDO/TDI hub units and four-row mill assemblies are supplied with a defined radial clearance class. The right class depends on the operating temperature, the housing fit and the shaft fit. Selecting too tight a class on a hot mill chock is a common cause of early heat-related failure.

Class	Description	Typical use
C2	Smaller than normal	Spindles and indexing positions where extra stiffness is needed; rare in heavy industry.
CN (Normal)	Normal clearance	Single-row pairs adjusted at mounting; default for vehicle hubs and standard gearbox shafts at moderate temperature.
C3	Larger than CN	TDO/TDI hub units, pre-set wheel ends and four-row mill assemblies running hot or with interference fits.
C4	Larger than C3	Hot strip mill work-roll and backup-roll chocks, vibratory or shock-loaded service, large interference fits.
C5	Larger than C4	Extreme thermal expansion or interference; consult engineering before specifying.

Frequently Asked Questions

Q1Why are tapered roller bearings used in pairs?

Tapered roller bearings generate an axial force component when loaded radially due to their cone geometry. A second bearing mounted in opposition (face-to-face or back-to-back) is required to absorb this thrust force and provide a stable shaft system. The pair arrangement also allows adjustable preload for precision applications.

Q2What is the difference between single-row and four-row tapered roller bearings?

Single-row tapered roller bearings handle combined loads in one direction and are typically mounted in pairs for bidirectional support. Four-row designs are self-contained units with very high load capacity, specifically engineered for rolling mill work rolls and backup rolls where extreme radial and axial loads exist simultaneously.

Q3How do I set the correct preload for tapered roller bearings?

Preload is set by adjusting the axial position of the bearing using shims, lock nuts, or spacers. Proper preload eliminates internal clearance to increase stiffness and load distribution. Too much preload causes excessive heat and reduced life; too little allows shaft play. Follow the manufacturer recommended axial displacement or starting torque values for your specific bearing series.

Q4What applications require tapered roller bearings?

Tapered roller bearings are essential where combined radial and axial loads exist: automotive wheel hubs, gearbox shafts, differential assemblies, rolling mill chocks, crane trolley wheels, and heavy-duty conveyor pulleys. They are preferred over cylindrical roller bearings whenever significant thrust loads are present alongside radial loads.

Q5What is the maximum operating temperature for tapered roller bearings?

Standard tapered roller bearings operate up to +150°C. For rolling mill applications with higher temperatures, heat-stabilised variants (S1 to +200°C, S2 to +250°C) maintain dimensional stability. Above +120°C continuous, synthetic or high-temperature oil lubrication is recommended instead of standard grease.