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Double-Row Tapered Roller Bearing

Double row tapered roller bearings consist of two rows of tapered rollers arranged side by side in mirror symmetry. Depending on the configuration, they share an inner or outer ring and utilize spacer rings to adjust axial clearance or preload. In addition to radial forces, it can also withstand bidirectional axial forces, which is suitable for medium and high speed applications. Double row tapered roller bearings can be separated so that individual bearing rings can be assembled separately.

Your Leading Double-Row Tapered Roller Bearing Supplier

SUN AUTOMATION GROUP LIMITED was founded in 1986 and had been focusing on exporting high bearing ever since. Our tapered roller bearing includes four-row tapered roller bearing, tapered roller bearing assembly, double-row tapered roller bearing and single-row tapered roller bearing. Tapered roller bearings are used in applications requiring the support of heavy loads and a combination of radial and axial forces, such as in vehicle wheel ends, heavy machinery like those for construction and mining, and industrial gearboxes. We have a stock warehouse and provide a variety of stock bearings.

For the paired bearing groups, they can be divided into O-arrangement, X-arrangement and tandem arrangement according to the different contact pressure curves.

Why Choose Us?

Rich Experience

SUN AUTOMATION GROUP LIMITED specializes in delivering professional bearing solutions, leveraging nearly 40 years of experience in bearing support and industrial services to serve its customers effectively.

Production Capacity

Our warehouse has one of the largest inventories. We have an annual output of 5 million sets of bearings. We guarantee direct shipments, timely delivery, and a single source of supply.

Production Market

Our products have been exported to North America, Europe, the Middle East, Brazil, South Africa, and Mexico and were well acknowledged by clients worldwide.

Professional Service

We have a 7*24 hours professional sales consultant team that can respond to your needs as quickly as possible and provide the fastest transportation method to bring you a high-quality and low-cost purchasing experience.

Types of Double-Row Tapered Roller Bearing

NN3048 Cylindrical Roller Bearing

The NN3048 bearing is a large size bearing with an inner diameter of 240 mm, an outer diameter of 360 mm and a width of 92 mm. It adopts high-quality materials and advanced manufacturing technology, and has stable movement characteristics and high load-bearing capacity.

351988 Bearing

351988 double row tapered roller bearing is separable bearings that cannot be self-maintaining. In addition to radial forces, high axial forces can also be tolerated in both directions due to the symmetrical arrangement of the bearings.

Specifications of Double-Row Tapered Roller Bearing

Type	Cylindrical Roller Bearing
Brearing No.	NN3048
Size	24036092 mm
D - Internal diameter	240 mm
D - External diameter	360 mm
B - Bearing/Inner ring width	92 mm
Basic dynamic load rating	1090 KN
Basic static load rating	1590 KN
Mass	32.8 kg

Features of Double-Row Tapered Roller Bearing

• Low friction, noise, and vibration.
• Long service life.
• Enhanced operational reliability even under difficult conditions.
• Running-in period with reduced temperature peaks.
• Separable and interchangeable components help to facilitate mounting, dismounting and maintenance.

Components of Double-Row Tapered Roller Bearing

Bearing rings
The pressure at the rolling contact area and the cyclic overrolling creates fatigue in the bearing rings when the bearing is in operation. To cope with such fatigue, rings that are made of steel must be hardened.
The standard steel for bearing rings and washers is 100Cr6, a steel containing approximately 1% carbon and 1,5% chromium.

Rolling elements
The rolling elements (balls or rollers) transfer the load between inner and outer rings. Typically, the same steel is used for rolling elements as for bearing rings and washers. When required, rolling elements can be made of ceramic material. Bearings containing ceramic rolling elements are considered hybrid bearings and are becoming more and more common.

Cages
Cages are radially centred either on:
The rolling elements;
The inner ring;
The outer ring.
Cages centred on the rolling elements permit the lubricant to enter the bearing easily. Ring centred cages, which provide more precise guidance, are typically used when bearings must accommodate high speeds, high vibration levels or inertia forces stemming from movements of the whole bearing.

Integral sealing
Integral sealing can significantly prolong bearing service life because it keeps lubricant in the bearing and contaminants out of it.

Installation of Double-Row Tapered Roller Bearing

Depending on their design, components of double row tapered roller bearings can also be mounted separately. The individual rings of one bearing must be mounted in the correct order and position. They must also not be mixed with those of another bearing when several bearings are mounted at the same time. Therefore, some precautions have been taken to ease mounting:

• Components of one bearing are marked with letters that indicate their correct order and position.
• All components of one bearing are marked with the same serial number.

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Special care should be taken not to deform or compress the relatively thin-walled intermediate rings when mounting smaller TDI design bearings. This can happen, for example, when tightening the cover screws and can have a negative impact on the axial clearance or the preload. Therefore, SKF recommends applying a cover with a centring spigot that is appropriate to the widths of the bearing and the housing seat.

Ordering Process

Send Us Inquiry → Receive Our Quotation → Negotiate Details → Confirm the Sample → Sign Contract/Deposit → Mass Production →cargo Ready → Balance/Delivery → Further Cooperation

Payment Terms

T.T with 30% downpayment, 70%before shipment.

Paypal or West Union also accept.

Packaging and Shipping

Shipping Time: Large quantities are in stock, with shipping time as short as 2 business days.

Packaging Details: We use standard export packaging to ensure safe transportation.

Shipping method: Express, air, sea, railway. From China t0 every corner of the w0rld.

FAQ

Q: What are tapered roller bearings used for?

A: Tapered roller bearings are commonly used in applications where radial and axial loads need to be supported, such as automotive wheel hubs, truck axles, industrial machinery, and agricultural equipment.

Q: What is the function of the tapered roller bearing design?

A: They are designed to handle both radial and thrust loads efficiently, making them suitable for heavy-duty applications where precise rotation and durability are essential.

Q: Are tapered roller bearings directional?

A: Tapered Roller Bearings: Designed to handle both radial and axial loads, they excel in applications where forces act in both directions.

Q: How should bearings be stored?

A: Store bearings flat, in a vibration-free, dry area with a cool, steady temperature. Control and limit the relative humidity of the storage area as follows: 75% at 20 °C (68 °F) 60% at 22 °C (72 °F)

Q: Are tapered rolling bearings serviceable?

A: Tapered roller bearings can provide excellent service and long life, often outlasting the machine they are attached to – provided you adhere to some maintenance guidelines. The keys to long wheel bearing life are cleanliness, grease, and preload.

We're well-known as one of the leading double-row tapered roller bearing manufacturers and suppliers in China. If you're going to buy high quality double-row tapered roller bearing with competitive price, welcome to get more information from our factory.

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