NA series

NA Series Machined Ring Needle Roller Bearings Full Sizes & Complete Suffix Guide

We supply full range NA series machined ring radial needle roller bearings from miniature NA4900 to heavy-duty NA4856, ultra-compact radial cross-section design for extreme high radial load capacity, the most popular compact needle bearing series for global wholesale distributors. Multiple modified suffix options (A, AS2, /YA, /C9), matched cage structures, standard & widened internal clearance, P0-P6 precision grades all in stock. Bulk buyers can check full dimension chart and suffix explanations below for automotive transmissions, gearboxes, automation, textile, packaging, agricultural and construction machinery use. All models support mixed batch OEM & custom export packaging.

Ultra Compact High Radial Load Core Design

NA series needle bearings adopt full machined inner & outer steel rings with cage-guided needle roller structure. Radial installation space is far smaller than deep groove ball bearings or tapered roller bearings, while radial load capacity far exceeds same-size ball bearings, perfect for compact gearbox, transmission and narrow-shaft equipment with limited radial mounting space. Precision grinding raceway and needle rollers ensure low vibration, smooth running and long service life under continuous heavy radial load.

Multi-Modified Suffix Working Condition Adaptation

Manufactured with high carbon chromium bearing steel, NA series covers standard base type, A thickened outer ring, AS2 ultra-precision tolerance, /YA outer ring positioning groove, /C9 widened high-temperature clearance variants. Strong adaptability for clean indoor transmission, slightly dusty workshop, high-temperature continuous operation and fixed positioning assembly scenarios.

Universal Compact Transmission Application Scope

Suitable for automotive gearboxes & differentials, industrial speed reducers, hydraulic pumps & air compressors, robotic joint automation equipment, textile printing & packaging machinery, small forklift transmission, light construction equipment, tractor compact gear assemblies and all kinds of narrow-space heavy radial load transmission devices.

NA49 & NA48 Full Dimension Table (d/D/T mm)

Core Modified Suffix Code Chart (A AS2 /YA /C9)

Cage Material Suffix Chart (Steel / Nylon / Brass)

Precision Grade Suffix Explanation Table

Frequently Asked Questions About NA Series Machined Ring Needle Roller Bearings

1.Can I mix NA49 miniature and NA48 heavy load needle bearing models in one wholesale order?

Mixed batch of all NA series sizes, modified suffixes and precision grades is fully supported. You can combine miniature small-bore NA49 series and large heavy-duty NA48 series in a single order to match different equipment assembly demands, with flexible low minimum order quantity for mixed bulk shipments.

(Español: Aceptamos pedidos mixtos combinando serie NA49 miniatura y NA48 carga pesada para maquinaria, MOQ flexible para distribuidores industriales.)

2.Do you provide OEM custom logo and private export packaging for NA needle bearings?

Yes, full OEM & ODM customization service available for all NA machined ring needle bearings, including laser engraved brand logo on outer ring, neutral export cartons, personalized color retail boxes and custom size label printing. Stainless steel treated, P4 high precision and high temperature /C9 clearance variants all support custom packaging orders.

(Español: Ofrecemos servicio OEM logotipo láser y empaques personalizados con marca privada para rodamientos serie NA.)

3.Are NA series needle roller bearings fully interchangeable with mainstream global brand equivalent needle bearings?

All NA series machined ring needle bearings strictly follow unified ISO metric dimensional tolerance standards, 100% dimensionally interchangeable with internationally mainstream brand same-model needle bearings, no secondary machining or shaft/housing modification required during equipment replacement.

(Español: Todos nuestros rodamientos serie NA cumplen norma ISO métrica, totalmente intercambiables con equivalentes marcas globales sin modificaciones mecánicas.)

4.What is the production & delivery lead time for stock NA bearings and customized modified suffix orders?

Standard popular NA base & A suffix models (NA4900~NA4918, NA4822~NA4832) are fully stocked in warehouse, goods can be shipped within 3–7 working days after deposit confirmation. Custom AS2 ultra-precision, /YA positioning groove, /C9 high clearance, brass M cage, P4 super precision customized orders require 15–28 working days production cycle.

(Español: Modelos estándar en stock envío 3-7 días hábiles, pedidos con sufijos modificados personalizados requieren 15-28 días de fabricación.)

5.Which NA suffix combination is most recommended for automotive gearboxes and agricultural tractor compact transmissions?

For automotive transmissions, tractor compact gearboxes and small agricultural machinery reducers, our top-selling universal combo is NAxxA TN9: A thickened outer ring improves radial load resistance, glass fiber nylon TN9 cage delivers ultra-low noise stable high-speed running. For dusty, high-temperature farm & construction equipment, upgrade to NAxxA/C9 TN9 widened clearance to offset thermal expansion under continuous heavy load operation.

(Español: Para cajas de engranajes automotrices y tractores recomendamos el conjunto NAxxA TN9, para ambientes calurosos y polvorientos el modelo NAxxA/C9 TN9.)