Cuscinetti a rulli cilindrici a singola fila

Introduzione

Single row cylindrical roller bearings are a type of bearing composed of a row or multiple rows of cylindrical rollers and a cage (or without a cage). Single row cylindrical roller bearings are a common bearing type, mainly used to withstand radial loads, and have a certain axial load carrying capacity. Its structural features include the separable design of the inner and outer rings, as well as the line contact or trimmed-down line contact between the rollers and the raceways. This design makes single row cylindrical roller bearings have large radial load carrying capacity, suitable for bearing heavy loads and shock load occasions.

Product Model and Parameter Table

Applicazioni

Single row cylindrical roller bearings have a wide range of applications in a variety of mechanical equipment. Due to their unique structural characteristics and excellent performance, single row cylindrical roller bearings perform well in occasions where they are subject to heavy loads, high speed rotation and high requirements for rotational accuracy. The following are specific application scenarios:

• Large motors: single row cylindrical roller bearings can withstand large radial loads and are suitable for supporting large motors to ensure the stable operation of mechanical equipment.
• Machine tool spindles: in machine tool spindles, these bearings can provide high rigidity and low friction operating environment, to ensure high precision machining of machine tools
• Engine front and rear bearing shafts: in the engine front and rear bearing shafts, single row cylindrical roller bearings can withstand heavy loads and shock loads, to ensure stable engine operation.
• Train passenger car trunk axle bearing: in the train passenger car trunk axle bearing, this kind of bearing can adapt to the high temperature and heavy load environment, to ensure the smooth operation of the vehicle.
• Diesel engine crankshaft: in the diesel engine crankshaft, single row cylindrical roller bearings can withstand high loads and shock loads, to ensure the reliable operation of the engine.
• Automobile tractor gearbox: in the automobile tractor gearbox, these bearings can adapt to high-speed rotation and heavy load conditions, to ensure the smooth operation of the gearbox.

Advantages

1. High Load Capacity: Single row cylindrical roller bearings can handle larger radial loads compared to other types, making them suitable for heavy-duty applications.
2. Low Friction and Low Heat Generation: The large contact area between the rollers results in low friction, which leads to lower heat generation, improving efficiency in high-speed operations.
3. High Rigidity: These bearings offer superior stiffness, making them ideal for applications that require high rigidity, such as mechanical transmission systems.
4. High-Speed Performance: They perform reliably at high speeds, making them suitable for use in machinery requiring high rotational speeds.
5. Adaptability in Harsh Environments: Single row cylindrical roller bearings are effective in extreme operating conditions, including exposure to dust, moisture, or high temperatures, providing excellent durability and stability.

FAQ

Q1：What is single row cylindrical roller bearing?

A1：Single row cylindrical roller bearing is a kind of rolling bearing, which is mainly composed of inner ring, outer ring, cylindrical roller and cage. Its key component, the roller, is cylindrical, which gives it the ability to withstand large radial loads. Compared with ball bearings, cylindrical roller bearings have a larger contact area, so their load carrying capacity is stronger.

Q2: What are the types of single row cylindrical roller bearings?

A2：Single row cylindrical roller bearings can be divided into various types such as N, NU, NJ, NF, NUP and so on according to whether the collar has a retaining edge or not. Each type has different structural characteristics and application scenarios, for example:

N type: the inner ring has no retaining edge, allowing axial displacement of the shaft relative to the bearing housing within a certain range, suitable for occasions requiring thermal expansion compensation.

NU type: outer ring without retaining edge, allowing the outer ring relative to the inner ring in a certain range of axial displacement, applicable to the relative movement of the outer ring and inner ring.

NJ type: outer ring single retaining edge, inner circle double retaining edge, can withstand a certain one-way axial load, applicable to the need for one-way axial positioning occasions.

Q3：What are the main features of single row cylindrical roller bearings?

A3：The main features of single row cylindrical roller bearings include:

High radial load capacity: due to the linear contact of the rollers, cylindrical roller bearings can withstand high radial loads.

Low coefficient of friction: the friction between the rollers and the raceways is small, which ensures the smooth running of the bearings under high load conditions.

Adaptation to high rotational speeds: some types of cylindrical roller bearings can reach very high rotational speeds with proper lubrication.

Compensation of axial displacement: some designs allow axial displacement of the inner or outer ring, suitable for use in thermal expansion and other conditions

Q4：What application scenarios are single row cylindrical roller bearings suitable for?

A4：Single row cylindrical roller bearings are widely used in large motors, machine tool spindles, engine front and rear support shafts, train coach trunk shaft support, diesel engine crankshafts, automobile tractor gearboxes and other mechanical equipment due to their high radial load carrying capacity, low friction coefficients and adaptability to high-speed rotation and other characteristics.

Q5：How to install and dismantle single row cylindrical roller bearings correctly?

A5：The inner or outer ring of single row cylindrical roller bearings can be separated for easy mounting and dismounting. When mounting, the machining accuracy of the shaft or seat hole should be ensured to avoid relative skewing of the axis of the outer ring after the bearing is mounted, so as not to cause contact stress concentration. When dismantling, special tools can be used or follow the guidelines provided by the manufacturer

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