Tapered Roller Bearings – Single Cones – Imperial

Tapered Roller Bearings Product Introduction

**TIMKEN Tapered Roller Bearings – Single Cones (Imperial Series 2490): Engineered for Precision and Durability**

TIMKEN tapered roller bearings are synonymous with reliability, high load capacity, and precision performance in demanding industrial and automotive applications. Among its extensive portfolio, the **TIMKEN Single Cone Tapered Roller Bearings (Imperial Series 2490)** stand out as a critical component for machinery requiring robust radial and thrust load support. Designed with exacting tolerances and superior metallurgy, these bearings excel in applications where misalignment resistance, long service life, and operational efficiency are paramount.

### **Technical Features & Design Advantages**
The **TIMKEN 2490 Series Single Cone** bearings are engineered to handle combined radial and axial loads, thanks to their precision-ground tapered rollers and raceways. Key features include:

– **Optimized Load Distribution:** The tapered geometry ensures even stress distribution across the rollers, reducing edge loading and extending bearing life.
– **High-Strength Steel Construction:** Manufactured from premium alloy steels, these cones undergo advanced heat treatment processes to enhance hardness, fatigue resistance, and durability under heavy loads.
– **Interchangeability & Precision Fit:** Designed to meet imperial (inch) dimensions, the 2490 Series cones are compatible with TIMKEN cups and assemblies, ensuring seamless integration into existing systems.
– **Enhanced Lubrication Retention:** The precision-machined surfaces and optimized roller profiles promote efficient lubricant flow, minimizing friction and heat generation.

### **Performance Benefits**
TIMKEN’s Single Cone bearings deliver unmatched performance in harsh operating conditions:
– **Superior Durability:** The hardened steel construction resists wear, spalling, and micro-fatigue, even in high-vibration environments.
– **Reduced Friction & Heat Build-Up:** Precision grinding and optimized roller alignment lower rotational resistance, improving energy efficiency.
– **Versatile Mounting Options:** Single cones allow for adjustable preload and axial clearance, making them ideal for applications requiring precise shaft positioning.

### **Typical Applications**
TIMKEN 2490 Series Single Cones are widely used in heavy-duty industrial and automotive systems, including:
– **Industrial Gearboxes & Pumps:** Supporting shafts in high-torque, low-speed, or high-speed applications.
– **Construction & Mining Equipment:** Wheel hubs, conveyor systems, and crushers where shock loads are prevalent.
– **Automotive Axles & Transmissions:** Providing reliable performance in truck differentials and drivetrains.
– **Precision Machinery:** Machine tool spindles and agricultural equipment requiring tight tolerances.

For engineers and maintenance professionals seeking a balance of strength, precision, and longevity, **TIMKEN’s 2490 Series Single Cone Tapered Roller Bearings** offer a proven solution backed by over a century of bearing innovation. Whether in extreme environments or precision assemblies, these bearings ensure optimal performance with minimal downtime.

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Part Number Series d - Cone Bore B - Cone Width C1 - Dynamic Radial Rating (1 million revolutions) C0 - Static Radial Rating
78225
78000
57.150 mm
33.236 mm
203000 N
193000 N
78225C
78000C
57.150 mm
33.236 mm
237000 N
234000 N
HH814540
HH814500
57.150 mm
57.150 mm
339000 N
423000 N
L507949
L507900
57.150 mm
18.258 mm
62700 N
95600 N
LL408049
LL408000
57.150 mm
12.700 mm
36100 N
46800 N
388A
385
57.531 mm
21.946 mm
108000 N
107000 N
388XS
385
57.981 mm
21.946 mm
98600 N
107000 N
3981
3900
58.738 mm
30.048 mm
139000 N
191000 N
65231
65000
58.738 mm
44.45 mm
243000 N
297000 N
3978
3900
59.530 mm
30.048 mm
139000 N
191000 N
65235
65000
59.881 mm
44.45 mm
243000 N
297000 N
745
745
59.931 mm
46.673 mm
318000 N
417000 N
66589
66500
59.972 mm
31.750 mm
183000 N
178000 N
28980
28900
59.977 mm
25.400 mm
106000 N
149000 N
66586
66500
59.977 mm
31.750 mm
155000 N
178000 N
39236
39000
59.987 mm
21.999 mm
115000 N
120000 N
3977X
3900
59.987 mm
28.001 mm
139000 N
191000 N
558-S
555
59.987 mm
36.678 mm
191000 N
248000 N
6391
6300
59.987 mm
56.007 mm
321000 N
404000 N
H913840
N/A
59.987 mm
39.688 mm
273000 N
256000 N
HM813839
HM813800
59.987 mm
36.513 mm
229000 N
256000 N
HM813839P
HM813800
59.987 mm
36.513 mm
229000 N
256000 N
HM911244
HM911200
59.987 mm
30.925 mm
198000 N
183000 N
29580
29500
60 mm
25.400 mm
131000 N
161000 N