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Needle roller bearings, also known as needle bearings, are a type of rolling bearing characterized by their slender and elongated needle-shaped rollers. Compared to ball bearings, needle roller bearings have a smaller cross-sectional area and volume but possess higher load-carrying capacity. This makes needle roller bearings excel in applications with limited space, particularly in cases of radial space constraints.
Needle bearings are characterized by its lightweight and high load capacity. It is made with relatively heavy but thin outer ring, made from hardened and precision ground materials, thus provides the smallest section height.
Needle roller bearings are renowned for their high precision and low-profile design. Their wider thickness and smaller outer diameter help them handle high loads. This makes them useful for miniaturization, lightweighting, and precision engineering in many machines.
The smaller rotating radius of needle roller bearings means they have lower rotational torque. This happens even with the same friction force. This design helps improve mechanical efficiency.
Needle roller bearings, are a type of rolling bearing. They have long and thin needle-shaped rollers.
Needle roller bearings are smaller than ball bearings. They have less cross-sectional area and volume. However, they can carry more load. This makes needle roller bearings excel in applications with limited space, particularly in cases of radial space constraints.
Learn More: Needle Bearing Size Chart: Find Your Perfect Fit Easily!
| Needle Roller Bearings | Other Bearings | |
|---|---|---|
| Design |
Long, thin cylindrical rollers (needles) with a high length-to-diameter ratio. |
Various designs with different types of rolling elements, such as balls or larger rollers. |
| Applications | Commonly used in applications with limited space and high radial load requirements. | Have diverse applications based on design, such as deep groove ball bearings for high-speed operations and tapered roller bearings for handling radial and axial loads. |
| Load-Handling Capacity | Excel in handling radial loads while maintaining a compact design. Less suitable for high-speed or heavy axial load applications. | Varies based on type; for example, deep groove ball bearings for high-speed applications and tapered roller bearings for both radial and axial loads. |
The TA series, also known as drawn cup needle roller bearings, are characterized by their thin-walled outer rings drawn from high-quality steel. These bearings are compact and offer excellent performance in applications where radial space is limited.
Drawn cup needle roller bearing(TA Series) is one of the needle roller bearings. It composed of thin walled punched outer ring, retainer and a group of needle rollers. It is usually formed with thin steel plate through precision punching with very sectional height and big load capacity, so it is suitable for the needed of the low cost and mass produced.
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Similar to the TA series, HK series bearings also feature a drawn cup design. It composed of thin walled punched outer ring, retainer and a group of needle rollers. It is usually formed with thin steel plate through precision punching with very sectional height and big load capacity, so it is suitable for the needed of the low cost and mass produced.
Drawn cup needle roller bearing is used between the needle bearings and the bearing cage, and no axial fixture device is required. Even under the condition of high speed and heavy load, the original function of the bearing can be fully maintained, and not to be easily damaged. Due to the high storage volume of grease, the drawn cup needle roller bearing possibly without lubricating for a long time.
The HF series, or needle roller freewheel bearings, allow rotation in one direction while blocking reverse motion. They are crucial for applications like conveyor systems, indexing mechanisms, and packaging equipment that require backstopping or overrunning functions. HF bearings provide precise motion control and prevent unintended movement in mechanical systems.
The HF Series one-way drawn cup needle roller clutch bearing consists of a thin-walled alloy steel outer ring and a plastic retainer. The inner surface of the outer ring securely holds the needles. With its slim design, the clutch offers low torque. Each needle is supported by an independent spring, enabling high switching frequency and precision.
NK series bearings, designed without an inner ring, provide a compact and lightweight solution for applications where the shaft cannot serve as a raceway. Ideal for high-speed operations, they are commonly used in automotive components like crankshafts and cam followers, where space and weight are key considerations.
Entity bushed needle roller bearing(NK Series) is a kind of high capacity bearing with small sectional height. It can operate very flexibly even with the light alloy bearing seat due to its high hard outer ring. There are two series: metric and inch series. Both of which are structured with retainer, full needle and sealing types.
Besides, the entity divides bush needle roller bearings into two kinds: those with an inner ring and those without a ring. The design team uses the center shaft as a rolling body tray for those without an inner ring, making its size even smaller.
Solid drawn cup needle roller bearings are a type of bearing with a small cross-sectional height and high load-carrying capacity. Due to the high hardness of the outer ring, it can be applied to even lightweight alloy bearing seats.
These bearings provide products in both metric and imperial series, with three types of structures in each series: a cage type, a full-needle type, and a sealed type.
In addition, solid drawn cup needle roller bearings are divided into two types: NA with an inner ring and RNA without an inner ring, with the latter using the shaft as the rolling surface to reduce its size.
Solid drawn cup needle roller bearings have a small cross-sectional height and high load capacity. Their hardened outer ring allows use with lightweight alloy bearing seats. These bearings come in two types: NA (with an inner ring) and RNA (without an inner ring). The RNA type uses the shaft as the rolling surface, making it more compact.
RNA series bearings, similar to NK series but without an inner ring, are ideal for applications with limited radial space. They are commonly found in textile machinery, printing presses, and packaging equipment, offering excellent radial load-carrying capacity and compact design. RNA bearings ensure smooth and efficient operation in confined spaces.
The AXK series thrust needle bearing consists of a tray ring gasket combined with a retainer holding needle roller bearings. The design allows for many rolling elements to be held in place, with minimal variation among them. These bearings are capable of supporting axial loads and are ideal for applications requiring high rigidity and minimal axial space.
AXK series bearings feature needle rollers and a cage assembly, offering excellent axial load capacity and stiffness. They are essential in applications with high axial loads, such as automotive transmissions, agricultural machinery, and heavy industrial equipment. AXK bearings provide reliable and precise axial motion control, ensuring smooth operation in mechanical systems.
KT radial needle roller and cage assemblies bearing is a kind of independent bearing unit with high load capacity and rigidity especially applicable for the tray of shaft and seat holes with the unit which is limited in radical dimension. Each needle have excellent operative characteristic due to each needle exactly guided and kept by the retainer.
KT series bearings, comprising cage and needle roller assemblies, are lightweight and compact, making them suitable for high-speed operations. They are commonly used in automotive engines, compressors, and industrial pumps, where their ability to handle both radial and axial loads is crucial for efficient performance. KT bearings ensure optimal functionality in demanding applications.
Needle roller bearings are important parts in many industrial uses. They are valued for their high load capacity and small size.
Among the many needle roller bearings, the TA, HK, HF, NK, NA, RNA, AXK, and KT series are notable. They have unique features and uses. In this comprehensive guide, we will delve into these series, elucidating their unique characteristics, applications, and advantages.
To obtain comprehensive information regarding the detailed dimensions of needle roller bearings, we recommend downloading our catalog.
The catalog provides in-depth specifications and technical details about various needle roller bearings, including bore diameter, outside diameter, width, and other critical dimensions.
Further reading:
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