NSKN312WC3Cylindrical Roller Bearing – Straight Bore, 60 mm ID, 130 mm OD, 31 mm Width, 1 Row, Open, C3 Internal Clearance, Non-Locating

Product Description

What this part is

NSK N312WC3 single-row cylindrical roller bearing. Bore: 60 mm. Outside Diameter: 130 mm. Overall Width: 31 mm. Bore Type: Straight. Number Of Rows: 1. Rolling Elements: Cylindrical rollers. Closure Type: Open. Internal Clearance: C3. Cage Material: Steel. Precision Class: ABEC 1 / P0. Bearing Material: Bearing steel. Series: N3 medium section. Dynamic Load Rating: 121 kN / 27,200 lbf. Static Load Rating: 119 kN / 26,800 lbf. Limiting Speed: 5,300 rpm. Operating temperature range: -40 °C to 150 °C. Item Weight: 4.01 lbs. Unit Quantity: 1 Pc.

Decoding the designation

N: cylindrical roller bearing with ribs on the inner ring only, so the outer ring is plain and the bearing is non-locating. 312: 60 mm bore in the 3 medium section, giving the 60 x 130 x 31 mm envelope. C3: internal radial clearance greater than normal. Searchable variants: N312WC3, N312W-C3, N 312 W C3, N-312-W-C3, N312W.

What these specs mean in practice

A line contact between roller and raceway carries far more radial load than a ball bearing of the same envelope: 121 kN dynamic on a 60 mm bore. The plain outer ring lets the roller set float axially, so the bearing takes radial load only and allows the shaft to grow with temperature without loading the raceways. That makes it the free-end bearing in a two-bearing shaft, working against a locating bearing at the other end. C3 clearance leaves extra room for that thermal growth and for an interference fit on the inner ring.

Quantity and configuration

Unit Quantity: 1 Pc. One single bearing, open on both faces.

Fitting notes

Straight bore, so the inner ring seats on a cylindrical shaft journal. The outer ring is separable from the inner ring and roller set, so the two halves mount independently. Working range runs from -40 °C to 150 °C.

Interchange guidance

Same envelope, same non-locating N design, same clearance class: SKF N 312 ECP and FAG N312-E-XL-TVP2, both in polyamide-caged executions. An NJ312 or NUP312 shares the 60 x 130 x 31 mm envelope and adds axial location, which makes each a related size rather than a substitute.