Cylindrical Roller Bearings：NU220
Cylindrical Roller Bearings：NU220 - Image 2
Cylindrical Roller Bearings：NU220 - Image 3
Cylindrical Roller Bearings：NU220 - Image 4

Cylindrical Roller Bearings：NU220

Product Name: Cylindrical Roller Bearings：NU220
Type: Roller Bearing Brand : FODA
New Model: NU220 Old Model: 32220
Inner Diameter (mm): 100 Outer Diameter (mm): 180
Thickness (mm): 34 Weight (kg/pc): 3.52
Category:

Description

Basic Parameters

The NU220 cylindrical roller bearing is a single-row, non-locating radial bearing designed for high radial load capacity and moderate axial displacement in one direction. It features an inner diameter (d) of 100 mm, an outer diameter (D) of 180 mm, and a width (B) of 34 mm. Constructed with a full complement of cylindrical rollers guided by a pressed steel cage, the bearing offers a basic dynamic load rating (C) of 192 kN and a basic static load rating (C0) of 182 kN, making it suitable for heavy-duty industrial applications. The radial internal clearance is standard (CN) as default, though C3 clearance can be specified for thermal expansion considerations. Made from high-quality GCr15 (SUJ2) alloy steel with through-hardened treatment, the bearing ensures high hardness and wear resistance. It operates at a reference speed of 4,000 rpm and a limiting speed of 5,300 rpm under well-lubricated conditions, with a service temperature range of -30°C to +120°C. The separable design—with an outer ring featuring two integral flanges and an inner ring without flanges—allows for easy installation and allows the shaft to move axially in both directions, making it ideal for applications such as conveyor systems, gear reducers, and large electric motors where high radial loads and slight misalignments are encountered.

Product Application

The NU220 cylindrical roller bearing, engineered for high radial load capacity and flexible axial movement, finds versatile applications across industrial sectors that demand robust performance under heavy-duty conditions. Its single-row, non-locating design—featuring an outer ring with two integral flanges and an inner ring without flanges—allows the shaft to move axially in both directions, making it ideal for scenarios requiring thermal expansion compensation or slight misalignment tolerance.

1. Industrial Conveying Systems
In belt conveyors, chain drives, and roller tables common in mining, cement, and logistics industries, the NU220 supports heavy payloads while accommodating axial shaft movements caused by temperature fluctuations or installation errors. Its separable structure simplifies maintenance: the inner ring can be mounted on the shaft independently of the outer ring, reducing downtime during replacement. The full complement of cylindrical rollers (guided by a pressed steel cage) distributes radial loads evenly, minimizing wear even in dusty or contaminated environments, such as aggregate processing or bulk material handling.
2. Gear Reducers & Transmissions
For industrial gearboxes and speed reducers in machinery like extruders, presses, and printing equipment, the NU220’s high dynamic load rating (192 kN) and static load rating (182 kN) ensure stable operation under intermittent shock loads and continuous high-torque transmission. The standard radial internal clearance (CN) provides precise shaft alignment, while the option for C3 clearance addresses thermal expansion in high-temperature applications, preventing bearing seizure. The bearing’s through-hardened GCr15 alloy steel construction resists surface fatigue, extending service life in high-load, low-speed reduction systems.
3. Heavy-Duty Electric Motors & Generators
In large electric motors (e.g., for pumps, compressors, and fans) and generator systems, the NU220 supports the rotor shaft, balancing radial forces from electromagnetic fields and mechanical vibrations. Its ability to allow bidirectional axial movement is critical for motors subject to thermal expansion, ensuring the shaft can expand freely without inducing stress on the bearing. The bearing’s low-friction design—combined with a limiting speed of 5,300 rpm under optimal lubrication—makes it suitable for high-efficiency motors requiring both power density and reliability.
4. Renewable Energy Equipment

Wind Turbines: Used in pitch control mechanisms and yaw drives, the NU220 withstands radial loads from blade adjustments and tower rotation while accommodating slight misalignments caused by wind-induced vibrations. Its corrosion-resistant surface treatment (when specified) enhances durability in coastal or harsh outdoor environments.

Hydroelectric Generators: In low-speed, high-torque generator shafts, the bearing’s robust load capacity and separable design facilitate easy installation in confined spaces, supporting steady rotational motion in water turbine systems.

5. Construction & Mining Machinery

Excavators & Loaders: The NU220 is ideal for swing drives, boom pivot points, and track roller systems, where it endures heavy radial loads from digging forces and uneven terrain. The pressed steel cage resists deformation under impact loads, ensuring consistent roller guidance during start-stop operations.

Crushing & Grinding Equipment: In jaw crushers, ball mills, and vibrating screens, the bearing supports eccentric shafts and rotating drums, handling cyclic loads and high-frequency vibrations. Its through-hardened raceways reduce indentation from abrasive particles, a common challenge in mining and mineral processing.

6. Precision Machinery & Processing Equipment
For paper machines, plastics extruders, and textile rollers, the NU220 balances high radial loads from roll weights with the need for smooth, low-vibration rotation. The bearing’s dimensional stability (ensured by precise heat treatment) maintains alignment in processes requiring tight tolerance control, such as film stretching or paper calendering. The option to specify C3 clearance further optimizes performance in heated environments, where thermal expansion could otherwise affect roller alignment.
By integrating these design strengths, the NU220 cylindrical roller bearing delivers reliable, long-lasting performance in industrial applications where high radial loads, axial flexibility, and ease of maintenance are paramount.

Product List

Bearing No. Dimensions (mm) Basic Load Rating (N)      Weight (kg)
ISO GOST d D B Dyn. C Stat. C0
NU202 32202 15 35 11 12700 10400 0.05
NU203 32203 17 40 12 17600 14600 0.07
NU204 32204 20 47 14 25700 22600 0.11
NU205 32205 25 52 15 29300 27700 0.14
NU206 32206 30 62 16 39100 37400 0.21
NU207 32207 35 72 17 50200 50200 0.31
NU208 32208 40 80 18 55700 55400 0.38
NU209 32209 45 85 19 63100 66400 0.44
NU210 32210 50 90 20 66100 71900 0.5
NU211 32211 55 100 21 86400 98700 0.65
NU 212 32212 60 110 22 97700 107000 0.83
NU 213 32213 65 120 23 108000 119000 1.05
NU 214 32214 70 125 24 119000 137000 1.16
NU 215 32215 75 130 25 130000 156000 1.29
NU 216 32216 80 140 26 139000 167000 1.56
NU 217 32217 85 150 28 167000 199000 1.94
NU 218 32218 90 160 30 182000 217000 2.38
NU 219 32219 95 170 32 221000 265000 2.92
NU 220 32220 100 180 34 250000 306000 3.52
NU 221 32221 105 190 36 201000 241000 4
NU224 32224 120 215 40 336000 421000 5.85
NU226 32226 130 230 40 364000 453000 6.6
NU228 32228 140 250 42 392000 514000 8.5
NU230 32230 150 270 45 448000 594000 10.7
NU232 32232 160 290 48 498000 666000 14.8
NU234 32334 170 310 52 603000 802000 18.6
NU236 32236 180 320 52 626000 852000 19.3
NU238 32238 190 340 55 694000 954000 23.3
NU240 32240 200 360 58 766000 1060000 27.2
NU244 32244 220 400 65 766000 1080000 38.5

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