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Needle Roller Bearings

Needle roller bearings use long, slender cylindrical rollers as rolling elements. Needle rollers have a small diameter relative to their length. Therefore, needle roller bearings require less radial installation space than other roller bearings, but they can still provide high radial load capacity. Needle roller bearings are generally used to support radial loads, while thrust needle roller bearings are designed to support axial loads.
Needle roller bearings manufactured by BKZ Industry, a bearing manufacturer with 15 years of experience, are produced according to different application requirements. We offer various types of needle roller bearings, such as needle roller thrust bearings, drawn cup needle roller bearings, universal joint bearings, etc. All these needle bearings are made of high-quality steel. They are suitable for automotive transmissions, gearboxes, A/C compressors, motorcycles, and other industrial applications.
With ISO 9001:2015 certification and experienced bearing engineers, BKZ Industry is committed to providing high-quality bearings for your applications.

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Needle Roller Bearings Use Long Slender Cylindrical Rollers

Benefits and Advantages of BKZ Industry Needle Roller Bearings

BKZ Industry needle roller bearings are designed for high load capacity, compact installation space, long service life, and reliable performance across various industrial applications.

Benefts of Needle Roller Bearings

High load capacity

Long, slender rollers create line contact with the raceways instead of point contact, which increases the contact area and improves load distribution. As a result, needle roller bearings can carry high radial loads even in limited radial space.

Space and Weight Saving Design

Needle rollers have a very small diameter and relatively long length, which allows needle roller bearings to carry relatively high loads within a small radial cross section compared with other roller bearings. Some designs, such as drawn cup needle roller bearings, use a thin-walled outer ring made from steel, which reduces both weight and outside diameter. In certain designs, needle roller bearings can operate without an inner ring, further reducing space and weight requirements. As a result, needle roller bearings are suitable for compact and lightweight equipment designs.

Wide Range Options for Different Applications

These bearings are available in many configuration options, including outer ring designs such as drawn cup or machined ring, inner ring designs with or without an inner ring, roller arrangements such as full complement or cage and roller assemblies, combined radial and thrust needle bearing designs, as well as sealing and lubrication options such as open or sealed designs. The appropriate design can be selected based on operating conditions and application requirements.

High Shock Load Supported

Line contact between rollers and raceways, a larger number of rollers, small diameter rollers, and a rigid structure all contribute to the ability of needle roller bearings to support high shock and impact loads.

Long Bearing Service Life

With high-quality steel materials, proper heat treatment, and appropriate lubrication, needle roller bearings can achieve a long service life under proper operating conditions.

Advantages of BKZ Industry Needle Roller Bearings

Wide Product Range, Customization, and Design Capacity

Different from trading companies, BKZ Industry is a manufacturing factory with more than 50 engineers and over 400 employees. This allows us to offer a wide range of needle roller bearings, including drawn cup needle roller bearings, machined ring needle roller bearings, needle roller and cage assemblies, thrust needle roller bearings, combined needle roller bearings, universal joint bearings, as well as customized bearing designs based on customer application requirements.

Sufficient Experience in Bearing Production

With 15 years of bearing production experience, BKZ Industry has worked with customers from different industries and applications, such as gearboxes, compressors, automotive transmissions, and other industrial machinery. This experience allows us to understand different operating conditions and provide suitable needle roller bearing solutions.

Strict Quality Control and Certifications

With ISO 9001 certification, strict incoming material inspection, advanced testing equipment, and controlled heat treatment processes, BKZ Industry takes product quality very seriously. Every production step is monitored to ensure stable quality and reliable bearing performance.

On-Time Delivery and Experienced Export

We have two factories and more than 15 production lines, with a daily production capacity of over 60,000 bearings. BKZ Industry can arrange production according to customer requirements and ensure on-time delivery. Our experienced export team ensures that customers can receive bearings smoothly and on time in different countries.

Cost Effective Solutions

With 15 years of bearing manufacturing experience, long-term cooperation with stable material suppliers, and mature production technology, BKZ Industry can maintain stable quality while offering competitive prices compared with larger bearing brands, helping customers reduce overall procurement costs.

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Needle Roller Bearing Types

Needle roller bearings can be classified into different types based on their structure, inner ring design, and application requirements.

Drawn Cup Needle Roller Bearings

Drawn Cup Needle Roller Bearings (HK, TA series)

Drawn cup needle roller bearings feature a thin-walled drawn outer ring with needle rollers and cage or full complement design. Typical series include HK, BK, and TA. These bearings provide high radial load capacity with minimal radial space and lightweight structure. They are commonly used in automotive transmissions, small gearboxes, power tools, compressors, and compact mechanical equipment.

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Needle Roller Bearings With Inner Ring

Needle Roller Bearings with Inner Ring (NA series)

Needle roller bearings with inner rings are designed with a machined outer ring, needle rollers, cage assembly, and a hardened inner ring. Typical series include NA and RNA with inner ring options. These bearings are suitable when the shaft cannot be hardened and ground. They provide high radial load capacity and accurate shaft support, commonly used in gearboxes, industrial machinery, pumps, and transmission systems.

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Needle Roller Bearings Without Inner Ring

Needle Roller Bearings without Inner Ring (NK, RNA series)

Needle roller bearings without inner rings use the shaft as the raceway, allowing for a compact design and reduced overall bearing size. Typical series include NK and RNA. These bearings are suitable when the shaft is hardened and ground. They provide high radial load capacity and space-saving design, commonly used in gearboxes, engines, compressors, and heavy-duty industrial equipment.

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Needle Roller And Cage Assemblies

Needle Roller and Cage Assemblies (K, KT series)

Needle roller and cage assemblies consist of needle rollers retained and guided by a cage without inner or outer rings. Typical series include K, KK, and KZK. These assemblies allow very compact designs and high-speed capability while maintaining good load distribution. They are commonly used in automotive gearboxes, connecting rods, compressors, and industrial transmission equipment.

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Thrust Needle Roller Bearings

Thrust Needle Roller Bearings (AXK series)

Thrust needle roller bearings consist of needle roller and cage assemblies combined with thrust washers. Typical series include AXK with AS or GS washers. These bearings are designed to support high axial loads while requiring minimal axial space. They are commonly used in gearboxes, automotive transmissions, machine tools, and other equipment requiring axial load support.

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Combined Needle Roller Bearings

Combined Needle Roller Bearings

Combined needle roller bearings integrate radial needle roller bearings with thrust ball or thrust roller bearings in one unit. Typical series include NKX, NKXR, ZARN, and ZARF. These bearings can support both radial and axial loads simultaneously, simplifying shaft support design. They are commonly used in machine tools, gearboxes, lifting equipment, and industrial automation machinery.

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Universal Joint Needle Roller Bearings

Universal Joint Needle Roller Bearings

Needle roller bearings for universal joints are designed with a drawn cup outer ring and full complement needle rollers to support oscillating motion and high load conditions. These bearings are typically used in automotive drive shafts and cardan shafts. They provide high load capacity, good wear resistance, and reliable performance under oscillating movement conditions.

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One Way Clutch Needle Roller Bearings

One-Way Clutch Needle Roller Bearings

One-way clutch needle roller bearings combine needle rollers and clutch mechanisms to transmit torque in one direction and allow free rotation in the opposite direction. Typical series include HF and HFL. These bearings are commonly used in starter motors, transmissions, printing machines, and indexing mechanisms where one-direction rotation control is required.

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*We also offer Needle Roller Bearings not listed here. Contact us for more options.

Needle Roller Bearing Size Chart​

Needle roller bearings are available in different types and series with various dimensions. You can select the appropriate bearing based on your application requirements. We have worked with customers from different industries and produced a wide range of needle roller bearing sizes. However, it is not possible to list all sizes in one table, so only some common and popular sizes are listed here for reference. For specific applications, please contact us for the correct bearing number or detailed dimensions.

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Bearing No Bearing Type Bore Diameter d (mm) Inscribed Circle Diameter Fw (mm) Outside Diameter D (mm) Bearing Width B / C (mm) Inner Ring Width B1 (mm) Total Height H (mm) Chamfer Radius rs min (mm) Dynamic Load Rating Cr (kN) Static Load Rating C0r (kN) Dynamic Axial Load Rating Ca (kN) Static Axial Load Rating C0a (kN) Fatigue Load Limit Cu (kN) Limiting Speed Grease (rpm) Limiting Speed Oil (rpm) Weight (kg) Reference Speed (rpm) Limiting Speed (rpm)
NA4900 Machined ring, with inner ring 10 – 22 13 14 – 0.3 8.8 10.4 – – – – – 0.024 24000 28000
NA4901 Machined ring, with inner ring 12 – 24 13 16 – 0.3 9.9 12.2 – – – – – 0.026 22000 26000
NA4902 Machined ring, with inner ring 15 – 28 13 20 – 0.3 11.2 15.3 – – – – – 0.034 19000 22000
NA4903 Machined ring, with inner ring 17 – 30 13 22 – 0.3 11.4 16.3 – – – – – 0.038 18000 20000
NA4904 Machined ring, with inner ring 20 – 37 17 25 – 0.3 21.6 28 – – – – – 0.075 15000 17000
NA4905 Machined ring, with inner ring 25 – 42 17 30 – 0.3 24.6 34.5 – – – – – 0.088 13000 15000
NA4906 Machined ring, with inner ring 30 – 47 17 35 – 0.3 26 39 – – – – – 0.1 11000 13000
NA4907 Machined ring, with inner ring 35 – 55 20 42 – 0.6 31.9 54 – – 6.7 – – 0.17 9500 11000
NA4908 Machined ring, with inner ring 40 – 62 22 48 – 0.6 48.5 67 – – 11.7 – – 0.234 5000 9200
NA4909 Machined ring, with inner ring 45 – 68 22 52 – 0.6 51 73 – – 12.9 – – 0.284 5200 8600
RNA4900 Machined ring, without inner ring – 14 22 13 – – 0.3 8.8 10.4 – – – – – 0.017 24000 28000
RNA4901 Machined ring, without inner ring – 16 24 13 – – 0.3 9.9 12.2 – – – – – 0.017 22000 26000
RNA4902 Machined ring, without inner ring – 20 28 13 – – 0.3 11.2 15.3 – – – – – 0.022 19000 22000
RNA4903 Machined ring, without inner ring – 22 30 13 – – 0.3 11.4 16.3 – – – – – 0.022 18000 20000
RNA4904 Machined ring, without inner ring – 25 37 17 – – 0.3 21.6 28 – – – – – 0.052 15000 17000
RNA4905 Machined ring, without inner ring – 30 42 17 – – 0.3 24.2 34.5 – – – – – 0.061 13000 15000
RNA4906 Machined ring, without inner ring – 35 47 17 – – 0.3 25.5 39 – – – – – 0.069 11000 13000
HK1010 Drawn cup, open end – 10 14 10 – – – 4.18 4.85 – – – 14220 23700 0.0041 – –
HK1212 Drawn cup, open end – 12 18 12 – – – 6.15 6.9 – – – 11400 19000 0.009 – –
HK1412 Drawn cup, open end – 14 20 12 – – – 6.8 8 – – – 10200 17000 0.0105 – –
HK1612 Drawn cup, open end – 16 22 12 – – – 7.2 9.2 – – – 9120 15200 0.0117 – –
HK1816 Drawn cup, open end – 18 24 16 – – – 11 16.4 – – – 7410 12350 0.0175 – –
HK2016 Drawn cup, open end – 20 26 16 – – – 12 19.1 – – – 6840 11400 0.0193 – –
HK2216 Drawn cup, open end – 22 28 16 – – – 12.7 21 – – – 6270 10450 0.0209 – –
HK2516 Drawn cup, open end – 25 32 16 – – – 14.8 22.8 – – – 5700 9500 0.0273 – –
HK3016 Drawn cup, open end – 30 37 16 – – – 16.35 27.55 – – – 4860 8100 0.032 – –
BK1010 Drawn cup, closed end – 10 14 10 8.4 – 0.4 4.29 5.3 – – – – – 0.004 18000 20000
BK1212 Drawn cup, closed end – 12 18 12 9.3 – 0.8 6.27 7.35 – – – – – 0.01 16000 18000
BK1412 Drawn cup, closed end – 14 20 12 9.3 – 0.8 6.82 6.85 – – – – – 0.012 15000 17000
BK1612 Drawn cup, closed end – 16 22 12 9.3 – 0.8 7.37 9.8 – – – – – 0.014 14000 16000
BK1816 Drawn cup, closed end – 18 24 16 13.3 – 0.8 11.2 17.6 – – – – – 0.02 13000 15000
BK2016 Drawn cup, closed end – 20 26 16 13.3 – 0.8 12.3 20.4 – – – – – 0.022 12000 14000
NK15/16 Machined ring, without inner ring – 15 23 16 – – 0.3 12.1 12.7 – – 2.36 – – 0.0218 17300 23900
NK20/16 Machined ring, without inner ring – 20 28 16 – – 0.3 13.2 17.5 – – 2.14 13000 20000 0.027 – –
NK25/20 Machined ring, without inner ring – 25 33 20 – – 0.3 19 32.5 – – – – – 0.041 16000 18000
NK30/20 Machined ring, without inner ring – 30 40 20 – – 0.3 22.1 34 – – 4.15 8500 13000 0.065 – –
NK35/30 Machined ring, without inner ring – 35 45 30 – – 0.3 41.5 72 – – – – – 0.112 11000 13000
NK40/30 Machined ring, without inner ring – 40 50 30 – – 0.3 38 83 – – 10.4 – – 0.13 10000 11000
NKI15/16 Machined ring, with inner ring 15 – 27 16 19 – 0.3 13.4 19 – – – – – 0.039 20000 24000
NKI20/16 Machined ring, with inner ring 20 – 32 16 24 – 0.3 15.4 24.5 – – – – – 0.048 16000 19000
NKI25/20 Machined ring, with inner ring 25 – 38 20 29 – 0.3 24.6 42.5 – – – – – 0.08 14000 15000
NKI30/20 Machined ring, with inner ring 30 – 45 20 35 – 0.3 27.5 52 – – – – – 0.11 11000 13000
NKI35/30 Machined ring, with inner ring 35 – 50 30 40 – 0.3 38 83 – – – – – 0.19 10000 11000
NKI40/30 Machined ring, with inner ring 40 – 55 30 45 – 0.3 45.7 108 – – – – – 0.22 9000 10000
AXK1024 Thrust needle roller bearing 10 – 24 – – 2 – – – 8.5 26 3 – – 0.003 5300 10000
AXK1226 Thrust needle roller bearing 12 – 26 – – 2 – – – 9.15 30 3.45 – – 0.003 5000 10000
AXK1528 Thrust needle roller bearing 15 – 28 – – 2 – – – 10.4 37.5 4.3 – – 0.004 4800 9500
AXK1730 Thrust needle roller bearing 17 – 30 – – 2 – – – 11 40.5 4.75 – – 0.004 4500 9500
AXK2035 Thrust needle roller bearing 20 – 35 – – 2 – – – 12 47.5 5.6 – – 0.005 4300 8500
AXK2542 Thrust needle roller bearing 25 – 42 – – 2 – – – 13.4 60 6.95 – – 0.007 3800 7500

Needle Roller Bearing Applications

Needle roller bearings can be used in many applications due to their compact design, ability to operate in limited installation space, and high load capacity. They are widely used in automotive, construction, and agricultural industries.

FAQs About Needle Roller Bearings

Q1. Needle Roller Bearings vs Ball Bearings: What Are Their Differences?

The main difference is the rolling elements. Needle roller bearings use long, thin cylindrical rollers, while ball bearings use balls. Because needle rollers have line contact instead of point contact, they have a larger contact area and can carry higher loads in limited space. Ball bearings are better for high-speed applications with lower loads.

Solid needle roller bearings are machined ring needle roller bearings with solid inner and outer rings. They are made from high-quality bearing steel with heat treatment and precision grinding. These bearings offer high load capacity, good wear resistance, and high rigidity. They are commonly used in gearboxes, industrial machinery, and heavy-load applications.

Stainless steel needle roller bearings are made from stainless steel for the rollers, rings, and sometimes the cage. They are designed for corrosion resistance and contamination resistance. These bearings are commonly used in food processing equipment, medical equipment, marine equipment, and environments with moisture or chemicals.

28x45x17 needle roller bearings are machined ring needle roller bearings with inner and outer rings. The numbers represent dimensions: 28 mm bore diameter, 45 mm outside diameter, and 17 mm width. These bearings are commonly used in gearboxes, transmission systems, and industrial machinery where high load capacity is required.

The main difference is whether they have an inner ring. NA series needle roller bearings have an inner ring, while RNA series do not. RNA bearings use the shaft as the raceway, which saves space but requires a hardened and ground shaft. NA bearings are used when the shaft cannot be hardened.

NK series needle roller bearings are bearings without inner rings, while NKI series bearings include an inner ring. NK bearings require the shaft to be hardened and ground to act as the raceway. NKI bearings are easier to install and are used when the shaft surface cannot be used as a raceway.

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Bearing Solutions for Various Industrial Applications

In addition to needle roller bearings, we supply a broad range of industrial bearing solutions designed for different operating environments and performance requirements. Our product range includes thrust ball bearings, stainless steel bearings, ceramic bearings, and high-temperature bearings, suitable for demanding industrial applications and special working conditions.

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Get a Fast Quote for Needle Roller Bearings

Send us your bearing number, dimensions, drawings, or application details, and our engineering and sales teams will provide fast quotations, technical support, and bearing selection assistance to help you find the right solution for your equipment.

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Complete the form below for a quote, or contact us at sales@bkzindustry.com or +86 18901426056 (WhatsApp/phone).