needle bearings

Deep groove ball bearing with seals or shields

Single row deep groove ball bearings with seals or shields are particularly versatile, have low friction and are optimized for low noise and low vibration, which enables high rotational speeds. They accommodate radial and axial loads in both directions, are easy to mount, and require less maintenance than many other bearing types. The integral sealing can significantly prolong bearing service life because it keeps lubricant in the bearings and contaminants out.Integral sea

ling prolongs bearing service life

Simple, versatile and robust design

Low friction and high-speed capability

Accommodate radial and axial loads in both directions

Require little maintenance

Knowledge and introduction of bearings    :                                                                                                 

Needle roller bearings are a specialized type of rolling-element bearing that use elongated, thin cylindrical rollers, often referred to as "needles," to reduce friction between moving parts. Here's a detailed introduction to needle roller bearings:

Types of Needle Roller Bearings

Needle roller bearings come in various types to suit different applications:

1. TA Series: Known as drawn cup needle roller bearings, these have thin-walled outer rings drawn from high-quality steel, offering compactness and excellent performance in applications with limited radial space .

2. HK Series: Similar to TA series, HK series bearings feature a drawn cup design and are known for their high load capacity and compact size, suitable for low-cost mass production .

3. HF Series: Needle roller freewheel bearings, which allow rotation in one direction while preventing reverse motion, essential in applications requiring backstopping or overrunning functions .

4. NK Series: Designed without an inner ring, these bearings are compact and lightweight, suitable for high-speed operations where the shaft serves as the raceway .

5. NA Series: Solid drawn cup needle roller bearings with an inner ring, offering a small cross-sectional height and high load-carrying capacity .

6. RNA Series: Like NK series but without an inner ring, these bearings are ideal for applications with limited radial space and offer excellent radial load-carrying capacity .

7. AXK Series: Axial needle roller and cage assemblies, designed to handle axial loads with precision and efficiency .

Applications

Needle roller bearings are used in a variety of applications where high load capacity, stiffness, and precision are required in a compact design:

• Automotive Sector: Commonly used in transmissions, torque converters, suspensions, U-joints, and auxiliary equipment .

• Domestic Appliances: Found in transmissions, pump clutches, spindles, idler pulleys, and other locations .

• Portable Power Tools: Benefit from the thin radial cross-section to help keep weight low .

• Industrial Machinery: Used in planetary gears, constant mesh gearboxes, and robot speed reducers .

Specifications and Features

• High Load Capacity: Due to their large surface area in contact with the races, needle bearings can support a greater load compared to other types of bearings .

• Compact Design: They require less clearance between the axle and the surrounding structure, making them suitable for compact designs .

• Low Friction: The small diameter and large surface area of the rollers help to dissipate heat and reduce friction .

• Shock and Vibration Suppression: Especially in bearings with outer rings made of high-strength steels .

Bearing Lifespan

The lifespan of needle roller bearings is influenced by constant compressive forces, which eventually lead to flaking. Life is typically estimated as the number of rotations before operation is compromised, and it's calculated based on the bearing's basic dynamic load rating .

In summary, needle roller bearings are critical components in many mechanical systems, providing high load capacity and stiffness in a compact form factor. Their versatility and efficiency make them indispensable in a wide range of industries and applications.

For further details on this product please directly contact our sales department under shh@dmsw.com 

 Our products                                                                                                                                                                 

Ball Bearings

SKF

NSK

FAG

TIMKEN

          IKO

NTN

GMN