SNRN-281-ESingle-Row Cylindrical Roller Bearing – 90 mm Bore x 160 mm OD x 30 mm Wide, N Design, Separable, High-Capacity E Execution

Product Description

What this part is

SNR N218E single-row cylindrical roller bearing, ISO N218 size. Bore: 90 mm. Outside Diameter: 160 mm. Width: 30 mm. Bearing Type: Single-row cylindrical roller bearing, N design. Number of Rows: 1. Rolling Elements: Cylindrical Roller. Bore Form: Straight (cylindrical). Closure Type: Open. Internal Clearance: CN. Series: 02 (ISO medium). Design: N — separable, non-locating.

Decoding the designation

N — two integral guide ribs on the inner ring and a plain, ribless outer ring. The outer ring lifts away from the roller-and-cage assembly, and the bearing carries radial load only.

2 — ISO dimension series 02, the medium section.

18 — bore code 18, giving a 90 mm bore.

E — SNR’s high-capacity reinforced execution, with a larger roller complement than the plain N218.

G15 — an SNR order-code position carried on the carton, recorded here as a part number variant.

What these specs mean in practice

Line contact between a cylindrical roller and its raceway spreads load over the roller length rather than a point, so a cylindrical roller bearing of this size carries several times the radial load of a ball bearing on the same 90 mm shaft. The E execution lengthens and multiplies the rollers within the same 90 x 160 x 30 mm envelope, so it drops into a standard N218 seat and carries more.

Design: N, separable and non-locating. Because the outer ring has no ribs, the inner ring and roller set can move axially relative to the outer ring while the bearing runs. That is what makes an N the floating position on a two-bearing shaft: it takes the radial load and lets the shaft grow and shrink with temperature, while a second bearing elsewhere fixes axial position.

The separable construction also means the two halves mount independently. The roller-and-cage assembly with its inner ring presses onto the shaft, the outer ring goes into the housing, and the two are brought together on assembly.

Internal Clearance: CN. Normal radial internal clearance.

Quantity and configuration

Unit Quantity: 1 Pc. One complete bearing — inner ring with roller and cage assembly, plus its outer ring.

Interchange guidance

The 90 x 160 x 30 mm envelope is ISO standard, so N218 bearings from every maker share the shaft and housing seats. The design letter is what decides substitution. An NU218 has the ribs on the outer ring instead of the inner, so it is the mirror construction on the same envelope and mounts the opposite way round. An NJ218 adds one inner-ring rib and locates the shaft in one direction; an NUP218 locates it in both. All are related sizes rather than direct swaps for an N. The high-capacity equivalents in other schemes carry E, EA, ECP or M1 suffixes on the same number.

Searchable variants of the part number: N218E, N 218 E, N-218-E, N218EG15, N 218 E G15, N218, 218E.