NU 222 ECM Bearing

 

Dimensions

d	110 mm	Bore diameter
D	200 mm	Outside diameter
B	38 mm	Width
D1	≈172.5 mm	Shoulder diameter of outer ring
F	132.5 mm	Raceway diameter of inner ring
r1,2	min.2.1 mm	Chamfer dimension
r3,4	min.2.1 mm	Chamfer dimension
s	max.2.1 mm	Permissible axial displacement

Abutment dimensions

da	min.122 mm	Diameter of spacer sleeve
da	max.129 mm	Diameter of spacer sleeve
db	min.135 mm	Diameter of shaft abutment
Da	max.187 mm	Diameter of housing abutment
ra	max.2 mm	Radius of fillet
rb	max.2 mm	Radius of fillet

Calculation data

SKF performance class		SKF Explorer
Basic dynamic load rating	C	335 kN
Basic static load rating	C0	365 kN
Fatigue load limit	Pu	42.5 kN
Reference speed		3 600 r/min
Limiting speed		4 000 r/min
Minimum load factor	kr	0.15
Limiting value	e	0.2
Calculation factor	Y	0.6

Associated products

Angle ring

HJ 222 EC

NU 222 ECM Bearing: Robust Design for Demanding Applications
The NU 222 ECM is a single-row cylindrical roller bearing engineered to deliver exceptional radial load capacity and operational reliability. Its ECM (Enhanced Component Manufacturing) technology incorporates a modified roller and raceway profile, optimizing stress distribution and reducing edge stresses under heavy loads. The bearing features a cage design crafted from high-strength brass or polyamide, ensuring stability at high speeds and in harsh environments. Precision grinding and advanced heat treatment processes (e.g., carburizing at 850–950°C) enhance surface hardness (60–64 HRC) while maintaining a tough core, significantly extending service life even in contaminated or misaligned conditions.

Performance Advantages for Industrial Efficiency
A key advantage of the NU 222 ECM lies in its ability to accommodate axial displacement within the bearing arrangement, making it ideal for applications requiring free shaft expansion. The logarithmic roller profile minimizes friction and heat generation, enabling continuous operation at speeds up to 4,500 rpm (oil lubrication). Its superior radial load rating (e.g., 305 kN dynamic load) outperforms standard NU 222 bearings by approximately 15–20%, reducing downtime in heavy machinery. Additionally, the ECM variant's improved surface finish (Ra ≤ 0.1 μm) and tighter tolerances (ISO P6 class) contribute to lower vibration levels, critical for precision equipment like gearboxes and electric motors.

Versatile Applications Across Industries
Widely adopted in sectors demanding high load-to-size ratios, the NU 222 ECM excels in mining conveyor systems, wind turbine main shafts, and steel mill roll necks. Its contamination-resistant design suits paper manufacturing equipment exposed to fibrous debris, while the temperature stability (-30°C to +150°C) ensures performance in industrial ovens or cold storage machinery. Recent case studies highlight its use in hydroelectric turbine guide bearings, where reduced maintenance intervals (up to 30,000 hours) have lowered operational costs by 18% compared to conventional designs. For retrofitting projects, engineers recommend pairing it with high-viscosity EP grease (NLGI 2/3) to maximize lubrication intervals in hard-to-access installations.

 

Hot Tags: nu 222 ecm bearing, nu 222 ecm bearing suppliers, 01B85M Bearing, Cooper Bearing 01EB250M Bearing, 100B125M Bearing, Split Bearing 1DTB90M, 100B115M Bearing, 71856C High Speed Angular Contact Ball Bearings