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Table of Contents
Lee
Cone roller bearing (conical roller bearing)
1. What is a Cone Roller Bearing?
A cone roller bearing, commonly known as a tapered roller bearing (TRB), is a rolling-element bearing designed to support combined radial and axial loads.
It consists of tapered rollers positioned between two raceways that are also tapered.
The geometry allows the bearing to carry very high loads, maintain alignment, and operate in harsh conditions.
2. Basic Components
A tapered roller bearing has four main components:
1) Cone (Inner Ring)
Contains the inner raceway
Guides the rollers
Includes the cone assembly (cone + rollers + cage)
2) Cup (Outer Ring)
Separate from the cone
Provides the outer raceway
3) Tapered Rollers
Truncated conical rollers
Support heavy radial and axial forces
Arranged so all roller axes intersect at a common apex
4) Cage
Holds and spaces rollers
Ensures smooth rotation and reduces friction
3. How Tapered Roller Bearings Work
Because all tapered surfaces (rollers, cone raceway, cup raceway) point toward a common apex on the bearing centerline:
The bearing can handle both radial and thrust (axial) loads.
Load capacity increases with the contact angle.
Larger contact angle ⇒ higher axial load capacity.
The design produces line contact between rollers and raceways, which spreads load over a larger area than ball bearings.
4. Key Advantages
✔ High load capacity
Handles very heavy radial loads and substantial axial loads.
✔ Durable under shock and vibration
Excellent in construction/mining/agricultural machinery.
✔ Adjustable endplay/preload
Allows precise shaft setting for gearbox, wheel hubs, and final drives.
✔ Suitable for harsh environments
Reliable in dusty, muddy, and high-load applications.
5. Common Applications
Construction & Mining Machinery
Excavator final drives
Wheel loaders
Bulldozer undercarriage
Track roller frames
Crusher equipment
Agricultural Equipment
Tractors
Combine harvesters
Gearboxes and PTO drives
Automotive
Wheel hubs
Differentials
Transmissions
Industrial Equipment
Gear reducers
Conveyor drives
Large pumps and compressors
6. Types of Tapered Roller Bearings
Single-row TRB
Handles combined radial + axial load in one direction
Most common type
Needs a second bearing for axial load reversal
Double-row TRB
Pre-assembled with two rows
Handles axial load in both directions
Ideal for wheel hubs, gearboxes
Four-row TRB
Used in extremely heavy loads
Steel mills, large mining equipment
Matched/pair bearings
Face-to-face or back-to-back arrangements
Used for precise shaft alignment and rigidity
7. Manufacturers
Major global producers:
Timken
SKF
NTN/SNR
NSK
FAG/INA (Schaeffler)
Caterpillar (Cat® OEM TRB cones & cups)
Koyo
- FHD
Common TRB Models for Construction Machinery (Excavators, Loaders, Dozers)
Final Drives / Travel Motors
32020X / 32022X / 32024X / 32026X / 32028X
32936 / 32938 / 32940 / 32948
30320 / 30322 / 30326
33110 / 33112 / 33116 / 33118 / 33120
352220 / 352222 / 352226 / 352230 (double-row)
Swing Gearbox / Swing Motor
31313 / 31314 / 31315 / 31316 / 31317
30220 / 30222 / 30224
32220 / 32222 / 32224
Undercarriage (Track Rollers & Idlers)
33212 / 33213 / 33215
LM29749 / LM29710
HM803146 / HM803110
TR0506 (common in rollers)
Differentials & Axle Hubs
HM518445 / HM518410
HM516449 / HM516410
LM603049 / LM603012
HM212049 / HM212010
Common TRB Models for Mining Equipment (Haul Trucks, Crushers, Shovels)
Large Haul Trucks – Wheel Ends / Differentials
EE755285/755360
EE542220/542290
HM926740 / HM926710
M349549 / M349510
L44649 / L44610 (lighter points)
Crushers (Cone Crusher / Jaw Crusher Bearings)
352960 / 352952 / 352968 (four-row TRB)
32260 / 32264 / 32272
32960 / 32968
32060 / 32072
Dragline / Electric Rope Shovel
M88048 / M88010
M86649 / M86610
EE275105/275155
3795 / 3720
Common TRB Models for Agricultural Machinery (Tractors, Harvesters, Implements)
Tractor Front/Rear Axles
30308 / 30309 / 30310
30208 / 30209 / 30210
32010X / 32012X / 32014X
Combine Harvester
LM102949 / LM102910
LM11949 / LM11910
HM804846 / HM804810
L68149 / L68110
Gearboxes (PTO, planetary, reduction)
31307 / 31308 / 31309
32210 / 32212 / 32214
32910 / 32912 / 32914
Balers, Disk Mowers, Seeders
LM48548 / LM48510
JL69349 / JL69310
L44649 / L44610
Compact “Automotive-Style” TRBs Often Used in Equipment Hubs
These are commonly used in utility tractors, telehandlers, farm wagons, compact loaders:
LM11949 / LM11910
LM67048 / LM67010
L44649 / L44610
L45449 / L45410
Heavy-Duty, High-Load TRBs (Large Gearboxes & Mining Drives)
Three-row and Four-row TRBs
3810/600
3829/750
3829/850
3829/900
3829/1000
These are used in steel mills, crushers, ball mills, and ultra-large mining drives.
Summary
FHD tapered roller bearings are high-capacity and durable bearings specifically designed to withstand large radial and axial loads. Their conical structure enables better load distribution, making them a standard choice in construction machinery, mining equipment, agricultural machinery, and automotive systems. Both standard and non-standard versions can be customized.
It’s helpful to see such a clear breakdown of the different bearing types and how they fit into various heavy-duty applications. For anyone working with OEM equipment, having this kind of structured overview makes it easier to match bearing design to load and environmental demands. I’m curious if future posts might dive deeper into how operating conditions—like shock loads or contamination—impact the choice between tapered and spherical roller configurations.
Thank you for the great feedback! We’re glad the breakdown was useful.
You’re absolutely right — factors like shock loads, misalignment, and contamination can strongly influence the choice between tapered and spherical roller bearings. We’ll be covering these operating conditions in upcoming posts.
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