IDCNJG2309VHFull-Complement Cylindrical Roller Bearing 45x100x36 mm NJ One-Direction Locating Cageless

Product Description

What this part is:

An IDC NJG2309VH full-complement single-row cylindrical roller bearing, 45 mm bore by 100 mm outside diameter by 36 mm width. The rollers fill the annulus completely with no cage between them, and the NJ ring geometry locates the shaft in one axial direction. It suits gearboxes, rolling mill and calender rolls, vibratory equipment, crushers and heavily loaded slow-turning shafts.

Decoding the designation:

NJ: one rib on the inner ring and two on the outer, so the bearing locates the shaft in one axial direction.

G with the VH suffix: full-complement, cageless design with a self-retaining roller set.

2309: 23-series wide section, 45 x 100 x 36 mm.

What these specs mean in practice:

A full-complement bearing carries more rollers than the caged equivalent of the same size, because the space a cage would occupy is filled with load-carrying rollers instead. That gives a substantially higher radial and static capacity in an unchanged envelope. The trade-off is speed: roller-to-roller sliding contact generates more friction and heat than a caged set, so full-complement bearings belong in slow to moderate-speed, heavily loaded positions rather than high-speed ones.

The NJ geometry decides what the bearing does in the arrangement. Its single inner-ring rib works against the outer-ring ribs to take thrust in one direction, so it can serve as the locating bearing on a shaft whose axial load acts one way, or as one half of a pair of opposed NJ bearings that locate a shaft in both directions. An NU bearing of the same envelope takes no thrust at all, and a NUP takes it both ways; each is a different location scheme.

The 23-series section is wide for its bore, which is where the extra capacity comes from and why this bearing appears in mill and vibratory duty where shock load matters more than speed.

Published specifications:

Bore: 45 mm.

Outside diameter: 100 mm.

Width: 36 mm.

Rows: 1.

Rolling elements: cylindrical rollers, full complement.

Cage: none, self-retaining roller set.

Design: NJ, locates the shaft in one axial direction.

Closure: open.

Precision class: normal / ISO P0.

Quantity and configuration:

One bearing ships, comprising the inner ring, the roller set and the outer ring.

Interchange guidance:

Full-complement NJG2309 cylindrical rollers from other makers: INA and FAG NJG2309-VH, SKF NJG 2309 VH, NSK NJG2309V. The caged NJ2309-E-TVP2 shares the 45 x 100 x 36 mm envelope but is a different part with a lower radial rating and a higher speed limit. NU2309 and NUP2309 of the same envelope change the axial location behaviour and are different parts.