INANK80/35Machined Needle Roller Bearing – 80 mm Roller Bore, 95 mm OD, 35 mm Width, Ribbed Outer Ring with Oil Hole, Steel Cage, Open

Product Description

What this part is

INA NK80/35 single-row machined needle roller bearing. Roller Bore (Fw): 80 mm. Outside Diameter: 95 mm. Overall Width: 35 mm. Number Of Rows: 1. Rolling Elements: Needle rollers. Bore Type: Straight. Closure Type: Open. Cage Material: Steel. Bearing Material: Bearing steel. Relubrication: Lubrication groove and hole in the outer ring. Dynamic Load Rating: 77.8 kN (17,500 lbf). Static Load Rating: 184.6 kN (41,500 lbf). Limiting Speed: 5 500 r/min.

Decoding the designation

NK — machined needle roller bearing with a ribbed outer ring, the needle rollers running directly on the shaft.

80 — 80 mm roller bore, the diameter of the shaft raceway the needles run on.

35 — 35 mm overall width.

What these specs mean in practice

The whole point of the type is capacity per millimetre of radial space: 77.8 kN dynamic and 184.6 kN static out of a ring wall only 7.5 mm thick on radius.

A static rating well above the dynamic rating is normal for a needle roller section. Line contact across a full complement of long rollers resists permanent indentation far better than it resists rolling fatigue.

The lubrication groove and hole in the outer ring let grease or oil reach the roller set from the housing bore during service.

The ribs on the outer ring guide the roller set axially and hold it together as one unit for handling and fitting.

Mounting data

Shaft raceway diameter: 80 mm. The shaft seat is the inner raceway, so it is hardened and ground to bearing raceway quality rather than finished as a plain fitting diameter. Housing bore: 95 mm.

Quantity and configuration

Unit Quantity: 1 Pc. Single bearing, open both faces, ribbed outer ring with steel-caged roller set.

Interchange guidance

NK80/35-XL is the X-life execution on the same 80 x 95 x 35 mm envelope with higher load ratings, so the figures above belong to the plain NK80/35. NK80/25 shares the 80 mm roller bore and 95 mm outside diameter in a 25 mm width. An IR inner ring can be added where the shaft cannot be hardened, which changes the bore to the inner ring bore.

Searchable designation forms: NK80/35, NK-80/35, NK 80/35, NK8035, NK 80 35.