RNA, NK series

RNA and NK series needle roller bearings are high-load, compact radial bearings without inner rings, designed for space-constrained mechanical systems. Featuring precision needle rollers and standard dimensions, they deliver reliable performance in automotive, industrial and automation equipment.

Classification :

Needle Roller Bearings

Keywords :

solid outer ring needle bearings,inner ring free needle bearings,high precision needle bearings,compact needle bearings

+8613561736033

info@jnyjbearing.com

E-mail

📌 Category Detail

RNA and NK series are machined ring needle roller bearings without inner rings, engineered for applications requiring maximum radial load capacity in minimal installation space.

RNA series: Machined outer ring with cage-guided needle rollers, for heavy-duty, high-rigidity applications
NK series: Drawn cup outer ring with cage-guided needle rollers, for compact, cost-effective solutions

Both series support high radial loads, accommodate moderate misalignment, and are available in standard and modified designs (suffixes like AF, AS, YA, TN1) for diverse industrial requirements, with full interchangeability with international standards.

🔥 Hot Selling Models & Dimensions

Model	Dimensions (mm)	Model	Dimensions (mm)	Model	Dimensions (mm)
RNA4822A	120×140×30	RNA49/8A	10×19×11	RNA49/9A	12×20×11
RNA4900A	14×22×13	RNA4901A	16×24×13	RNA4902A	20×28×13
RNA4902AF	20×28×13	RNA4903A	22×30×13	RNA4904A	25×37×17
RNA4905A	30×42×17	RNA4906A	35×47×17	RNA4907A	42×55×20
RNA4907A/AS4	42×55×20	RNA4907AF1	42×55×20	RNA4908A	48×62×22
RNA4909A	52×68×22	RNA4909AF1	52×68×22	RNA4910A	58×72×22
RNA4910A/YB2	58×72×22	RNA4911A	63×80×25	RNA4912A	68×85×25
RNA4913A	72×90×25	RNA4914A	80×100×30	RNA4915A	85×105×30
RNA4916A	90×110×30	RNA4917A	100×120×35	RNA4918A	105×125×35
RNA4919A	110×130×35	RNA4920A	115×140×40	RNA4922A	125×150×40
RNA4924A	135×165×45	RNA59/7A	10×17×15	RNA59/8A	12×19×15
RNA5900A	14×22×16	RNA6901A	16×24×22	RNA6901	16×24×22
RNA6902	20×28×23	RNA6903	22×30×23	RNA6904	25×37×30
RNA69/22	28×39×30	RNA6905	30×42×30	RNA69/28	32×45×30
RNA6906	35×47×30	RNA6901AF1	16×24×22	RNA6902A	20×28×23
RNA6903A	22×30×23	RNA6904A	25×37×30	RNA6905A	30×42×30
RNA6905ATN1	30×42×30	RNA6905AF1A	30×42×30	RNA6906A	35×47×30
RNA49/7X2A	10×17×12	RNA4905X2A	30×42×20	RNA6001X2A	20×28×25
RNA6001X2L1A	20×28×25	RNA6002X1A	18×33×30	RNA6002X1ATN1	18×33×30
RNA6/37A	37×52×22	NK16/16A	16×24×16	NK16/20A	16×24×20
NK16/20AF1	16×24×20	NK14/16A	14×22×16	NK20/20A	20×28×20
NK20/25A	20×28×25	NK22/20A	22×30×20	NK25/16A	25×33×16
NK25/20A/AS	25×33×20	NK32/20A	32×42×20	NK55/25A	55×68×25
RNA2913/YA4	75×90×16	-	-	-	-

✅ Key Features

No inner ring design for ultra-compact radial installation
High radial load capacity and rigidity for heavy-duty applications
Precision cage-guided needle rollers for smooth, low-friction operation
Wide range of standard sizes and suffix modifications for diverse needs
Full interchangeability with international standard dimensions
Ideal for gearboxes, transmissions and space-constrained machinery

💼 Typical Applications

Automotive transmissions, gearboxes and differentials
Industrial machinery, pumps and compressors
Automation equipment and robotic systems
Printing, textile and packaging machinery
Heavy-duty engineering and construction equipment

Category Overview

Needle Roller Bearings feature long and thin rolling elements (needles) with a small diameter, providing an extremely high load-carrying capacity within a very small radial cross-section. This compact design makes them ideal for applications with limited installation space but requiring high rigidity and heavy load performance.Our full range includes drawn cup, solid collar, cage assemblies, and combined axial-radial types, widely used in automotive, gearboxes, engines, hydraulic components, and industrial machinery.

Our Series Breakdown

We provide a complete range of needle roller bearing series for compact and heavy-duty transmission systems:

Series & Type	Features	Typical Applications
Drawn Cup Needle Roller Bearings	Thin-walled outer ring, compact, economical, easy installation	Automotive parts, small gearboxes, power tools
Solid Collar Needle Roller Bearings	High rigidity, high precision, strong impact resistance	Heavy gearboxes, construction machinery, hydraulic pumps
Needle Roller & Cage Assemblies	Low friction, high speed, suitable for larger diameters	Engine parts, transmission components, industrial machinery
Combined Needle & Thrust Bearings	Support radial + axial loads simultaneously, space-saving	Clutches, pumps, compressors, lifting equipment
Heavy Duty Needle Roller Bearings	Extra load capacity, durable under shock loads	Mining machinery, agricultural equipment, reducers

Core Advantages

Extremely small radial sectional height, saves installation space
High load capacity with compact size
High rigidity and excellent anti-impact performance
Suitable for high-speed and oscillating motion
Multiple structures available for different assembly conditions

Typical Applications

Widely used in automotive transmissions, engines, gearboxes, hydraulic pumps, power tools, agricultural machinery, construction equipment, textile machinery, and small precision industrial mechanisms.

PRODUCT TESTING

Bearing Forging

Bearing Annealing

Turning Process

Quenching

Bearing Assembly

Bearing Clearance Testing

Grease injection

Bearing Marking

Needle Roller Bearings