Product Overview

The NMT NJ 202 ECP is a single-row cylindrical roller bearing with NJ design – featuring two integral flanges on the outer ring and a flange on one side of the inner ring. With a 15 mm bore, 35 mm outer diameter, and 11 mm width, this bearing is manufactured from high-quality bearing steel, equipped with a glass fibre reinforced polyamide 66 (PA66) cage (ECP) . Specifically designed for high radial loads combined with unidirectional axial location, it also features a separable design for easy mounting and maintenance.

 

The bearing offers a basic dynamic load rating of 12.5 kN and a static load rating of 10.2 kN [0†L17-L18][2†L7]. It achieves a reference speed of 22,000 r/min [2†L18] and a limiting speed of 26,000 r/min [2†L7][8†L13]. The bearing weighs only 0.048 kg (48 g) [1†L6][5†L10] with an operating temperature range of -30°C to +90°C (up to +110°C for short periods) [5†L4].

 

Model Code Decoding – Understanding NMT NJ 202 ECP

Code Meaning

NJ Design code – outer ring with two integral flanges, inner ring with flange on one side, accommodates unidirectional axial loads and provides unidirectional axial location [3†L9]

202 Size series designation – 15 mm bore, 35 mm OD, 11 mm width [0†L6-L7]

EC Optimised internal design – accommodates more and/or larger rollers with improved roller end/flange contact for higher load capacity [3†L9]

P Glass fibre reinforced PA66 cage – roller-guided, injection moulded, lightweight, high strength, high speed capability [3†L7-L9]

Core Value: The NJ design, with two flanges on the outer ring and a flange on one side of the inner ring, accommodates unidirectional axial loads and provides unidirectional axial location, making it particularly suitable for applications requiring axial location of the shaft in one direction. The ECP cage, made of glass fibre reinforced PA66, combines high strength with lightweight characteristics, providing excellent roller guidance accuracy at high speeds [3†L7-L8]. The separable design allows independent mounting of inner and outer rings, significantly simplifying assembly and maintenance [7†L17]. Logarithmically crowned rollers effectively optimise contact stress distribution between rollers and raceways, reducing edge stress concentration and extending bearing service life [6†L7]. The open flange design, combined with optimised roller end design and surface finish, promotes lubricant film formation, reducing friction and increasing axial load carrying capacity [6†L4-L6]. The synergy of high radial load capacity, high speed performance, separable design, and unidirectional axial location makes this bearing the ideal precision bearing solution for high-radial-load high-speed rotating equipment.

 

Core Performance Advantages

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

The line contact design of cylindrical roller bearings provides extremely high radial load carrying capacity [7†L16]. With a basic dynamic load rating of 12.5 kN and static load rating of 10.2 kN [0†L35-L36][8†L13-L14], this bearing offers radial load capacity far exceeding ball bearings of the same size.

 

2. High Speed Performance – 22,000 – 26,000 r/min

The low-friction characteristics of the ECP glass fibre reinforced PA66 cage, combined with optimised internal geometry, deliver a reference speed of 22,000 r/min [2†L18][6†L17] and a limiting speed of 26,000 r/min [2†L7][8†L13]. The cage design is suitable for high speeds, rapid accelerations and peak loads [3†L21].

 

3. Unidirectional Axial Location – The Unique Advantage of NJ Design

With a flange on one side of the inner ring, this bearing accommodates unidirectional axial loads and provides unidirectional axial location [5†L4][7†L17]. Compared to the NU design (inner ring without flanges, allowing bidirectional axial displacement), the NJ design is better suited for applications requiring axial location of the shaft in one direction.

 

4. Separable Design – Easy Installation and Maintenance

The bearing features a separable design [7†L17][3†L13] – inner and outer rings can be mounted independently, significantly simplifying assembly and maintenance [6†L10-L12]. This is particularly important in applications requiring frequent maintenance or component replacement.

 

5. 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 [6†L7]. They also offer lower sensitivity to shaft eccentricity and shaft deflection [6†L7-L8].

 

6. Open Flange Design – Low Friction and High Axial Load Capacity

The open flange design, combined with optimised roller end design and surface finish, promotes lubricant film formation, reducing friction and increasing axial load carrying capacity [6†L4-L6].

 

7. Glass Fibre Reinforced PA66 Cage (ECP) – Speed and Durability Combined

The roller-guided glass fibre reinforced PA66 cage [3†L7-L8] offers an excellent strength-to-weight ratio, low friction characteristics, and dimensional stability, providing superior guidance accuracy at high speeds while reducing centrifugal forces, friction, and heat generation [3†L21]. The non-metallic cage significantly reduces rotational friction, improving efficiency and extending bearing life [8†L31-L32].

 

8. Wide Operating Temperature Range

This bearing operates within a temperature range of -30°C to +90°C (up to +110°C for short periods) [5†L4], capable of adapting to various demanding environments from cold to high-temperature processing.

 

9. Clear Performance Specifications

 

Parameter Value

Bore d 15 mm [0†L6]

Outer Diameter D 35 mm [0†L6]

Width B 11 mm [0†L7]

Chamfer r₁,₂ min. 1.0 mm [5†L9]

Dynamic Load Rating C 12.5 kN [0†L18][2†L7]

Static Load Rating C₀ 10.2 kN [0†L18][2†L7]

Fatigue Load Limit Pu 1.22 kN [2†L31-L32]

Reference Speed 22,000 r/min [2†L18][6†L17]

Limiting Speed 26,000 r/min [2†L7][8†L13]

Design Code NJ (outer ring with two flanges, inner ring with flange on one side) [3†L9]

Cage Material Glass Fibre Reinforced PA66 (ECP) [3†L7-L8]

Number of Rows 1 [0†L17]

Seal Type Open [8†L12]

Radial Clearance CN (Normal) [4†L19][7†L20]

Weight 0.048 kg (48 g) [1†L6][5†L10]

Temperature Range -30°C to +90°C (up to +110°C short term) [5†L4]

Typical Applications

The NMT NJ 202 ECP, with its high radial load capacity, high speed performance, unidirectional axial location, and separable design, covers an exceptionally wide range of high-end applications:

 

Electric Motors – general industrial motors, servo motors [8†L28]

 

Gearboxes – industrial gearboxes, reducers [8†L29]

 

Automation Systems – industrial automation equipment and machinery [8†L29]

 

Pumps and Compressors – high-speed rotating machinery

 

Industrial Fans – high-speed, high-radial-load applications

 

Traction Motors – high radial load and high speed combinations

 

Material Handling Equipment – conveyors, hoists

 

Machine Tool Spindles – high-precision rotating equipment

 

Rotating Shaft Systems Requiring Unidirectional Axial Location – combined floating and fixed end configurations

 

Important Installation Notes

✅ This bearing features NJ design (outer ring with two flanges, inner ring with flange on one side), accommodating unidirectional axial loads and providing unidirectional axial location [5†L4]. Ensure the axial load direction matches the flange direction during installation.

 

✅ This bearing features a separable design – inner and outer rings can be mounted independently, significantly simplifying assembly and maintenance [7†L17][3†L13].

 

✅ Ensure shaft and housing fits comply with P0 tolerance grade requirements (bore 15 mm, OD 35 mm).

 

✅ This bearing is unsealed (open design) [8†L12] – select appropriate lubrication method based on application – grease or oil lubrication.

 

✅ This bearing features CN (normal) radial clearance [4†L19][7†L20], suitable for most general applications.

 

⚠️ Cylindrical roller bearings primarily accommodate radial loads – axial load capacity is limited [5†L3].

 

⚠️ 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 [3†L7-L8].

 

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 NJ 202 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 NJ design, ECP glass fibre reinforced PA66 cage, high radial load capacity, high speed performance, and separable design makes this bearing the flagship precision bearing in the NMT cylindrical roller bearing series – offering the perfect balance of high radial load, high speed, and unidirectional axial location.

 

Choose NMT NJ 202 ECP for:

 

✅ NJ design – unidirectional axial location, ideal for fixed-end applications

 

✅ ECP glass fibre reinforced PA66 cage – speed and durability combined

 

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

 

✅ 26,000 r/min high speed performance – industry-leading

 

✅ Separable design – easy installation and maintenance

 

✅ Logarithmically crowned rollers – extended service life

 

✅ Open flange design – low friction and high axial load capacity

 

✅ Wide temperature range – -30°C to +110°C

 

✅ Japanese precision manufacturing quality