Needle Roller Bearing 

Meta Title

Needle Roller Bearing | HK BK K NK NA RNA STO NATV Inch Bearing Supplier

Meta Description

Premium metric & inch needle roller bearings, including HK, BK, K, NK, NA, RNA, STO, RSTO, NATR, NATV, B/BH series. Compact high load bearings for automotive, automation, industrial machinery. Factory direct wholesale, fast global shipping.

Core Keywords

needle roller bearing, metric needle bearing, inch needle roller bearing, drawn cup bearing, solid ring needle bearing, track roller bearing, cam follower bearing, HK bearing, BK bearing, NA RNA bearing, B series inch bearing, BH series full complement bearing

Needle roller bearings are indispensable compact rolling bearings widely used in modern mechanical transmission systems. Featuring slender needle rollers and an ultra-thin radial cross-section, they deliver extremely high radial load capacity while occupying minimal installation space, outperforming standard ball bearings and cylindrical roller bearings in limited-space heavy-duty working conditions. Manufactured with high-grade 100Cr6 / GCr15 bearing steel, precision heat treatment and surface grinding, our metric and inch series needle roller bearings achieve high rigidity, low friction, wear resistance and long service life. They are extensively applied in automotive transmissions, hydraulic systems, automated machinery, conveyor equipment, machine tools, agricultural machinery and power tools.

We supply a full range of standard metric needle roller bearings and inch-size needle roller bearings, covering drawn cup, cage assembly, solid machined ring, track roller, cam follower and thrust types. All models comply with ISO and international industrial standards, fully in stock for global wholesale and customization.

1. Metric Needle Roller Bearing Main Models (Hot Selling Series)

1.1 HK / BK Drawn Cup Needle Bearing

HK series open-end and BK series closed-end drawn cup needle bearings are the most cost-effective compact bearings for narrow housing installation. Stamped thin outer ring structure saves space and ensures stable rotation for high-speed light-to-medium load scenarios.

Main HK Models: HK0608, HK0810, HK1012, HK1216, HK1612, HK2030, HK2538, HK3038, HK3543, HK4050, HK1612RS, HK20302RS

Main BK Models: BK1210, BK1616, BK2020, BK2526, BK3030, BK3532, BK4040

1.2 K Series Cage & Needle Roller Assembly

Cage-guided needle roller units without inner and outer rings, designed for hardened shaft raceways. Lightweight and low-cost, suitable for high-precision gear and sliding mechanisms.

Main Models: K101410, K152013, K202620, K253020, K303820, K354325, K404830, K202620ZW

1.3 NK / NA / RNA Solid Ring Needle Bearing

Solid thick outer ring structure provides strong impact resistance and high rigidity for heavy-load industrial equipment. NA series complete with inner ring, RNA series without inner ring, NK series lightweight solid ring types.

NK Series: NK1216, NK1620, NK2025, NK2530, NK3032, NK3540, NK4045

NA Series: NA4900, NA4902, NA4905, NA4908, NA6901, NA6904, NA6907, NA2200-2RS

RNA Series: RNA4900, RNA4903, RNA4906, RNA6900, RNA6905, RNA2200, RNA22042RS

1.4 STO / RSTO Track Roller Bearing

Yoke-type track roller bearings with crowned outer ring, suitable for linear track operation, resisting heavy radial shock loads. STO with side flanges, RSTO flange-free for flexible axial displacement.

Main Models: STO15, STO20, STO25, STO30, STO35, STO40, STO50, RSTO12, RSTO17, RSTO25, RSTO30, RSTO35, RSTO45

1.5 NATR / NATV / KR Cam Follower Bearing

Stud-type cam follower bearings with integrated bolt structure, easy installation for automation cam systems and conveyor tracks. NATR allows slight axial movement; NATV full complement design for ultra-high load capacity.

Main Models: NATR12, NATR17, NATR20, NATR25, NATR30, NATR35PP, NATV15, NATV20, NATV25, NATV30, NATV35PP, NATV40PP, KR10, KR16, KR22, KR30, KR40PP, KR52PP

1.6 AXK Thrust Needle Bearing

Specialized for axial load bearing and shaft positioning, widely used in gearboxes and clutch assemblies.

Main Models: AXK0821, AXK1226, AXK1730, AXK2035, AXK2542, AXK3047, AXK3552, AXK4060

2. Inch Size Needle Roller Bearing Full Models (Exclusive for American/European Standard Equipment)

Inch needle roller bearings adopt imperial dimensional standards, perfectly matching old-type European and American machinery, automotive equipment and hydraulic devices that cannot be replaced by metric bearings. We supply two mainstream inch series: B Series (caged inch needle bearings) and BH Series (full complement inch needle bearings), covering all common industrial specifications.

2.1 B Series Inch Caged Needle Roller Bearings

B-series inch needle bearings with cage structure, low friction, suitable for medium and high-speed continuous operation, widely used in US-standard gearboxes and power transmission parts.

Hot Models: B910, B912, B105, B107, B108, B1010, B1012, B146, B148, B1412, B1416, B1420

2.2 BH Series Full Complement Inch Needle Roller Bearings

BH-series full complement inch needle bearings have no cage, equipped with maximum number of needle rollers, providing extreme high load capacity, ideal for low-speed heavy-duty mechanical scenarios.

Hot Models: BH98, BH910, BH912, BH108, BH1010, BH1012, BH2216

2.3 BHA / SCH Special Inch Needle Bearings

High-precision stamped inch drawn cup needle bearings for precision automation and hydraulic components.

Main Models: BHA810, BHA88, SCH810, SCH1412

3. Core Advantages of Our Needle Roller Bearings

•Dual Metric & Inch Coverage: Complete standard metric and imperial inch models, one-stop solution for global equipment matching

•Ultra-High Load Capacity: Dense needle roller line contact structure provides 2-3 times higher load capacity than same-size ball bearings

•Space-Saving Compact Design: Ultra-thin radial section reduces equipment volume and realizes lightweight mechanical design

•High Precision & Durability: 100Cr6 bearing steel, integral quenching and anti-rust treatment, long service life under harsh working conditions

•Sealed & Open Options: RS/2RS sealed models prevent dust, water and oil leakage, suitable for humid and dusty workshops

•Fast Global Supply: All standard metric and inch needle bearings in stock, OEM & custom non-standard service available

4. Industrial Applications

Our metric and inch needle roller bearings are widely used in automotive transmission systems, electric vehicle reducers, automated production lines, cam drive mechanisms, hydraulic pumps and cylinders, machine tool slides, textile machinery, printing equipment, agricultural harvesters and engineering machinery. The complete model range can perfectly adapt to European, American and Asian standard mechanical equipment.