Product Overview

The NMT NUP 2203 ECP is a single-row cylindrical roller bearing with NUP design – featuring two integral flanges on the outer ring, one integral flange on one side of the inner ring, and a loose flange ring on the other side. With a 17 mm bore, 40 mm outer diameter, and 16 mm width, this bearing is manufactured from high-quality bearing steel, equipped with a glass fibre reinforced polyamide 66 (PA66) cage (ECP) , and features CN radial clearance (normal group) . It belongs to the SKF Explorer performance class, specifically designed for high radial loads in combination with high speeds, and features a separable design for easy mounting and maintenance. The bearing weighs 0.097 kg (97 g) .

 

Model Code Decoding – Understanding NMT NUP 2203 ECP

Code Meaning

NUP Design code – outer ring with two integral flanges, inner ring with one integral flange and one loose flange ring

22 Size series designation – light, wide series

03 Bore size code – 17 mm bore

EC Optimised internal design – accommodates more and/or larger rollers with improved roller end/flange contact for higher load capacity

P Glass fibre reinforced PA66 cage – roller-guided, injection moulded, lightweight, high strength, high speed capability

Core Value: The NUP design is the most prominent structural feature of this bearing – the outer ring features two integral flanges, while the inner ring has one integral flange on one side and a loose flange ring on the other. This design enables the bearing to locate the shaft axially in both directions. The ECP glass fibre reinforced PA66 cage combines high strength with lightweight characteristics, providing excellent roller guidance accuracy at high speeds. The SKF Explorer performance class represents higher load capacity and extended service life. The separable design allows independent mounting of inner ring, outer ring, and roller assembly, significantly simplifying assembly and maintenance. Logarithmically crowned rollers effectively optimise contact stress distribution between rollers and raceways. The synergy of high radial load capacity, bidirectional axial location, high speed performance, and separable design makes this bearing the ideal precision bearing solution for high-radial-load high-speed rotating equipment.

 

Core Performance Advantages

1. NUP Design – Bidirectional Axial Location Capability

The NUP design is the most complete axial location design among cylindrical roller bearings. The outer ring features two integral flanges, while the inner ring has one integral flange on one side and a loose flange ring on the other. This design enables the bearing to locate the shaft axially in both directions. The loose flange ring ensures flexibility and reliability when the bearing is subjected to bidirectional axial loads.

 

2. SKF Explorer Performance Class – Higher Load Capacity, Longer Life

This bearing belongs to the SKF Explorer performance class, representing the highest level of SKF's bearing design, material, and manufacturing technology. Compared to standard class bearings, the Explorer class offers higher load capacity, longer service life, and superior operational reliability.

 

3. High Radial Load Capacity – High Load in Compact Space

The line contact design of cylindrical roller bearings provides extremely high radial load carrying capacity. With a basic dynamic load rating of 27.5 kN and static load rating of 21.6 kN, this bearing offers radial load capacity far exceeding ball bearings of the same size.

 

4. High Speed Performance – 20,000 – 22,000 r/min

The optimised internal geometry and low-friction non-metallic cage design deliver a reference speed of 20,000 r/min and a limiting speed of 22,000 r/min. The single-row design enables higher speed operation and is suitable for heavy loads and impact loads.

 

5. Separable Design – Easy Installation and Maintenance

The bearing features a separable design – inner ring, outer ring, and roller assembly can be mounted independently, significantly simplifying assembly and maintenance. This allows bearing components to be interchanged, which is particularly important in applications requiring frequent maintenance or component replacement.

 

6. Glass Fibre Reinforced PA66 Cage (ECP) – Speed and Wear Resistance Combined

The roller-guided glass fibre reinforced PA66 cage offers an excellent strength-to-weight ratio, low friction characteristics, and dimensional stability. The non-metallic cage significantly reduces rotational friction, improving efficiency and extending bearing life.

 

7. CN Radial Clearance – Ideal for General Applications

CN radial clearance is normal clearance, suitable for most general applications, ensuring stable temperature performance and running accuracy under normal operating conditions.

 

8. Optimised Roller Profile – Extended Service Life

Logarithmically crowned rollers effectively optimise contact stress distribution between rollers and raceways, reducing edge stress concentration and extending bearing service life. Precision-honed rolling contact surfaces further reduce friction and vibration.

 

9. Wide Operating Temperature Range

This bearing operates within a temperature range of -30°C to +120°C, capable of adapting to various demanding environments from cold to high-temperature processing.

 

10. Clear Performance Specifications

 

Parameter Value

Bore d 17 mm

Outer Diameter D 40 mm

Width B 16 mm

Inner Ring Shoulder Diameter d₁ ≈ 25 mm

Outer Ring Shoulder Diameter D₁ ≈ 32.35 mm

Inner Ring Raceway Diameter F 22.1 mm

Chamfer r₁,₂ min. 0.6 mm

Chamfer r₃,₄ min. 0.3 mm

Dynamic Load Rating C 27.5 kN

Static Load Rating C₀ 21.6 kN

Fatigue Load Limit Pu 2.65 kN

Reference Speed 20,000 r/min

Limiting Speed 22,000 r/min

Design Code NUP (outer ring with two flanges, inner ring with one flange + loose flange ring)

Cage Material Glass Fibre Reinforced PA66 (ECP)

Radial Clearance CN (Normal)

Number of Rows 1

Seal Type Open (Unsealed)

Bore Type Cylindrical

Tolerance Class Normal (PN/P0)

Weight 0.097 kg (97 g)

Carbon Footprint 0.36 kg CO₂e

Temperature Range -30°C to +120°C

Typical Applications

The NMT NUP 2203 ECP, with its NUP design bidirectional axial location capability, high radial load capacity, and high speed performance, covers an exceptionally wide range of high-end applications:

 

Large and Medium Electric Motors – general industrial motors, servo motors

 

Railway Vehicles – traction motors and transmission systems

 

Machine Tool Spindles – high-precision rotating equipment

 

Internal Combustion Engines – high-speed, high-load engine components

 

Generators – power generation equipment

 

Gas Turbines – high-speed turbomachinery

 

Gearboxes – industrial gearboxes, reducers

 

Rolling Mills – heavy-load metallurgical equipment

 

Vibrating Screens – mining and building materials equipment

 

Hoisting and Transport Machinery – conveyors, hoists

 

Traction Motors – high radial load and high speed combinations

 

Gearboxes – transmission systems requiring bidirectional axial location

 

Important Installation Notes

✅ This bearing features NUP design (outer ring with two flanges, inner ring with one flange + loose flange ring), providing bidirectional axial location. Ensure the loose flange ring is correctly installed.

 

✅ This bearing features a separable design – inner ring, outer ring, and roller assembly can be mounted independently, significantly simplifying assembly and maintenance.

 

✅ Ensure shaft and housing fits comply with normal precision class requirements (bore 17 mm, OD 40 mm).

 

✅ This bearing is unsealed (open design) – select appropriate lubrication method based on application – grease or oil lubrication.

 

✅ This bearing features CN (normal) radial clearance, suitable for most general applications.

 

✅ This bearing has no axial displacement capability – the NUP design provides bidirectional axial location and does not permit axial displacement of the shaft relative to the housing.

 

⚠️ Cylindrical roller bearings primarily accommodate radial loads – axial load capacity is limited.

 

⚠️ This bearing has no lubrication groove and no lubrication holes – lubrication must be supplied through an external lubrication system.

 

⚠️ The ECP cage is made of glass fibre reinforced PA66 – avoid contact with sharp tools during installation to prevent cage damage.

 

NMT Quality Commitment

Japan NMT (Enmutī) has deep expertise in the precision bearing industry, with breakthroughs in material purification, process refinement, scenario customisation, and intelligent upgrading, transforming precision bearings into core solutions addressing pain points across multiple industries. The NMT NUP 2203 ECP bearing is manufactured to strict Japanese quality standards – from ring material (high-purity bearing steel), rollers (logarithmically crowned), to superfinishing processes. The combination of NUP bidirectional location design, SKF Explorer performance class, ECP glass fibre reinforced PA66 cage, high radial load capacity, and high speed performance makes this bearing the flagship precision bearing in the NMT cylindrical roller bearing series – offering the perfect balance of bidirectional axial location, high radial load, and high speed performance.

 

Choose NMT NUP 2203 ECP for:

 

✅ NUP design – bidirectional axial location, ideal for fixed-end applications

 

✅ SKF Explorer performance class – higher load capacity, longer life

 

✅ 27.5 kN high radial load capacity – high load in compact space

 

✅ 22,000 r/min high speed performance – industry-leading

 

✅ Separable design – easy installation and maintenance

 

✅ Glass fibre reinforced PA66 cage – speed and wear resistance combined

 

✅ CN radial clearance – ideal for general applications

 

✅ Logarithmically crowned rollers – extended service life

 

✅ Wide temperature range – -30°C to +120°C

 

✅ Japanese precision manufacturing quality