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NJ309

Cylindrical Roller Bearing

Lead TimePOA
ISO 9001 Certified Authorised UK Distributor
NJ309 Cylindrical Roller Bearing
Nachi
Nachi logo

A robust single-row bearing for heavy industrial machinery, capable of handling significant radial and unidirectional axial loads. [Cylindrical Roller Bearings](https://www.nachi-bearings.de/media/crb_dimensions_web.pdf)

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Technical Dimensions & Load Ratings

Confirm these values match your shaft, housing and application requirements before ordering.

Dimensions

Bore Diameter (d)45mm
Outer Diameter (D)100mm
Width (B)25mm
Weight0.86kg

Load & Speed Ratings

Dynamic Load Rating (Cr)102kN
Static Load Rating (C0r)101kN
Reference Speed6700rpm

Product Details

Part NumberNJ309
BrandNachi
Bearing TypeCylindrical Roller Bearing
Seal TypeOpen
MaterialChrome Steel
Stock StatusExtended Stock

Technical Datasheet

Download full specifications for NJ309 — dimensions, load ratings, and material data.

No cross-reference part numbers are recorded for NJ309. Ask our team for equivalent part numbers.
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Engineering support

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Frequently Asked Questions

What is a NJ309 bearing?

The NJ309 is a Nachi Cylindrical Roller Bearing with a 45mm bore, 100mm outer diameter and 25mm width. It is Extended Stock at Buy Bearings.

What are the NJ309 dimensions?

The NJ309 measures 45mm bore (inner diameter) × 100mm outer diameter × 25mm width.

What does Open mean on a bearing?

Open bearings have no seals or shields, allowing maximum speed and easy relubrication — best for clean, lubricated environments.

Is the NJ309 in stock?

The NJ309 is Extended Stock at Buy Bearings. Submit an enquiry or call our sales team for current stock and pricing (POA).

Related & Compatible Bearings

Same cylindrical roller bearing, closest dimensions first — useful if you need a slightly different size or this part is unavailable.

N309 Cylindrical Roller Bearing
N309
NTN/SNR logo
POAPrice Match
Bore
45
OD
100
Width
25
SealOpen
NTN Cylindrical Roller Bearing with Open seals measuring 45mm bore × 100mm outer diameter × 25mm width. Built for heavy radial loads in gearboxes, conveyors and industrial drives. Manufactured from Chrome Steel (SAE 52100) for durability and long service life. In Stock at Buy Bearings. Order by 1pm for next-day UK dispatch.
In Stock
N309-M-C3 Cylindrical Roller Bearing
N309-M-C3
Schaeffler logo
POAPrice Match
Bore
45
OD
100
Width
25
SealOpen
Schaeffler Cylindrical Roller Bearing with Open seals measuring 45mm bore × 100mm outer diameter × 25mm width. Built for heavy radial loads in gearboxes, conveyors and industrial drives. Manufactured from Chrome Steel (SAE 52100) for durability and long service life. In Stock at Buy Bearings. Order by 1pm for next-day UK dispatch.
In Stock
NJ309C4ECP Cylindrical Roller Bearing
NJ309C4ECP
ISB logo
POAPrice Match
Bore
45
OD
100
Width
25
SealOpen
ISB Cylindrical Roller Bearing with Open seals measuring 45mm bore × 100mm outer diameter × 25mm width. Built for heavy radial loads in gearboxes, conveyors and industrial drives. Manufactured from Chrome Steel (SAE 52100) for durability and long service life. In Stock at Buy Bearings. Order by 1pm for next-day UK dispatch.
In Stock
NJ309ECJ Cylindrical Roller Bearing
NJ309ECJ
ISB logo
POAPrice Match
Bore
45
OD
100
Width
25
SealOpen
ISB Cylindrical Roller Bearing with Open seals measuring 45mm bore × 100mm outer diameter × 25mm width. Built for heavy radial loads in gearboxes, conveyors and industrial drives. Manufactured from Chrome Steel (SAE 52100) for durability and long service life. In Stock at Buy Bearings. Order by 1pm for next-day UK dispatch.
In Stock

Related Parts — Seals & Bushings

Matching seals and bushings for 45mm shaft diameter — complementary components for your bearing.

45X55X8 R21 Seals
45X55X8 R21
Unclassified
POAPrice Match
Bore
45
OD
55
Width
8
SealOpen
Unclassified Seals with Open seals. A versatile bearing suitable for a range of mechanical applications. Manufactured from Chrome Steel (SAE 52100) for durability and long service life. In Stock at Buy Bearings. Order by 1pm for next-day UK dispatch.
In Stock
45X60X7 R23 Seals
45X60X7 R23
Unclassified
POAPrice Match
Bore
45
OD
60
Width
7
SealOpen
Unclassified Seals with Open seals. A versatile bearing suitable for a range of mechanical applications. Manufactured from Chrome Steel (SAE 52100) for durability and long service life. In Stock at Buy Bearings. Order by 1pm for next-day UK dispatch.
In Stock
45X60X8 R23 Oil Seals
45X60X8 R23
Neutral
POAPrice Match
Bore
45
OD
60
Width
8
Double Lip Rubber Oilseal
In Stock
45X60X9 R23 Seals
45X60X9 R23
Unclassified
POAPrice Match
Bore
45
OD
60
Width
9
SealOpen
Unclassified Seals with Open seals. A versatile bearing suitable for a range of mechanical applications. Manufactured from Chrome Steel (SAE 52100) for durability and long service life. In Stock at Buy Bearings. Order by 1pm for next-day UK dispatch.
In Stock
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