SKF NU311ECML/C3B20 Cylindrical Roller Bearing 55 × 120 × 29 mm

Cylindrical Roller Bearing

RFQ

Estimated delivery: 26 Jul 2026 (overseas stock, ~4 weeks)

In stockEstimated delivery: 26 Jul 2026 (overseas stock, ~4 weeks)

EX-WORKS (Incoterms 2020) Seoul, Korea — Buyer arranges freight, duties, and insurance.

Category: Cylindrical Roller Bearing
Dimensions: 55x120x29mm

Overview

Cylindrical roller bearing

Cylindrical roller bearings provide line contact between rollers and raceways, accommodating very high radial loads together with high-speed operation. Depending on the flange configuration (NU, NJ, N, NUP), they allow axial displacement or locate the shaft in one or both directions, and their separable design eases mounting and maintenance. They are widely used in gearboxes, electric motors and rolling-mill equipment for heavy-duty service.

Key features

Very high radial load capacity
High-speed capable with high rigidity
Separable design for easy mounting
Axial function selectable by flange type

Typical applications

Industrial electric motors
Gearboxes and reducers
Machine tool spindle support positions
Rolling mills, paper machines, and heavy machinery

Selection guidance

Choose the N, NU, NJ, or NUP design by load direction, axial locating requirement, cage material, internal clearance, and lubrication condition.

Symbol	Value	Description
C	156 kN	Basic dynamic load rating
C0	143 kN	Basic static load rating
reference_speed_rpm	6 000 r/min	Reference speed
limiting_speed_rpm	11 000 r/min	Limiting speed
performance_class	SKF Explorer	SKF performance class

Symbol	Value	Description
d	55 mm	Bore diameter
D	120 mm	Outside diameter
B	29 mm	Width

Symbol	Value	Description
da	max. 68 mm	da
db	min. 73 mm	db
Da	max. 109.2 mm	Da
ra	max. 2 mm	ra
rb	max. 2 mm	rb

Code	Description
베어링 부품	Complete bearing
축방향 변위 역량	In both directions
열 개수	1
로케이팅 기능, 베어링 외륜	None
보어 유형	Cylindrical
케이지	Machined brass
플랜지 개수, 외부 링	2
플랜지 개수, 내부 링	0
루스 플랜지	None
경방향 내부틈새	CN
공차 클래스	Normal
코팅	None
씰링	None
윤활유	None
재윤활 기능	None
제품 순 중량	1.62 kg
eClass 코드	23-05-09-01
UNSPSC 코드	31171505

datasheet pdf download

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