Product Overview

The NMT KDN.K02508CP0 is a thin section radial contact ball bearing belonging to the Reali-Slim® thin section bearing series. With a 25 mm bore, 41 mm outer diameter, and 8 mm width, this bearing features an ultra-thin constant section design – the bearing cross-section remains constant as the bore diameter increases, delivering significant space and weight savings while maintaining load capacity. As a single-row open design bearing, it accommodates radial loads and some axial loads in either direction, making it an ideal precision bearing solution for compact high-precision equipment in the NMT thin section bearing series.

 

Model Code Decoding – Understanding NMT KDN.K02508CP0

Code Meaning

KDN Kaydon thin section bearing series designation – Reali-Slim® thin section radial contact ball bearing

K Material & design code – AISI 52100 chrome steel rings and balls, open design (no seals)

025 Bore size – 25 mm (three-digit code, 025 = 25 mm)

08 Width/series code – 8 mm series thin section bearing

CP0 Precision class & radial clearance code – ABEC-1 precision class, specific radial clearance

Core Value: The KDN.K02508CP0 thin section bearing is a compact member of the Reali-Slim® series. The ultra-thin constant section design ensures the bearing cross-section remains constant as the bore diameter increases, delivering stable load capacity with only 8 mm width at a 25 mm bore. The open design facilitates flexible lubrication and maintenance. Chrome steel rings and balls with a brass cage provide excellent wear resistance and running accuracy. The ABEC-1 precision class ensures smooth motion in precision applications. The synergy of thin section design, lightweight construction, and precision manufacturing makes this bearing the ideal bearing solution for space-constrained high-precision equipment.

 

Core Performance Advantages

1. Ultra-Thin Constant Section Design – Compact Space, Lightweight

This bearing features a single cross-section design that remains constant as the bore diameter increases, delivering significant space and weight savings. With only 8 mm width at a 25 mm bore, it weighs just 0.06 kg. The thin section design is ideal for compact designs with limited space, while weight reduction is critical for weight-sensitive applications such as aerospace.

 

2. High Precision Manufacturing – ABEC-1 Precision Class

This bearing is manufactured to high precision standards with a precision class of ABEC-1. This is critical for applications requiring precise and smooth motion, making it suitable for robotics, automation equipment, medical imaging devices, and other applications with strict accuracy requirements.

 

3. High Load Capacity – Thin Section, Not Thin Capacity

Despite its thin cross-section, this bearing can accommodate significant radial, axial, and moment loads. With a dynamic radial load rating of 562 lbf (2.5 kN)  and a static radial load rating of 668 lbf (2.97 kN) , combined with chrome steel rings and balls with a brass cage, it ensures durability and broad applicability across various mechanical installations.

 

4. Bidirectional Axial Load Capacity – Flexible Combined Load Handling

This is a radial contact ball bearing designed to accommodate radial loads and some axial loads in either direction. This feature provides flexibility in applications requiring both radial and bidirectional axial loads.

 

5. Low Friction and High Running Accuracy – Efficiency and Performance Combined

The thin section design and precision manufacturing process deliver low friction characteristics and high running accuracy. The low friction coefficient improves overall application efficiency, while high stiffness ensures stable operation under load.

 

6. Wide Operating Temperature Range

This bearing operates within a temperature range of -30°C to 110°C, capable of adapting to various demanding environments from cold to high-temperature processing.

 

7. Environmentally Compliant

This bearing is compliant with RoHS environmental standards, ensuring safe use even in regions with strict environmental regulations.

 

8. Clear Performance Specifications

 

Parameter Value

Bore d 25 mm

Bore Tolerance -0.01mm to 0

Outer Diameter D 41 mm

OD Tolerance -0.01mm to 0

Width B 8 mm

Width Tolerance +0.000 –0.127mm

Inner Ring Outer Diameter 30.9 mm

Outer Ring Inner Diameter 35.1 mm

Dynamic Radial Load 562 lbf (2.5 kN)

Static Radial Load 668 lbf (2.97 kN)

ISO Radial Load 1053 lbf

Reference Speed 8,000 r/min

Radial Clearance 0.0000 – 0.0005"

Precision Class ABEC-1

Ring Material Chrome Steel (AISI 52100)

Ball Material Chrome Steel (AISI 52100)

Cage Material Brass

Seal Type Open

Weight 0.06 kg

Temperature Range -30°C to 110°C

Typical Applications

The NMT KDN.K02508CP0, with its ultra-thin constant section design, lightweight construction, and high precision characteristics, covers an exceptionally wide range of high-end compact applications:

 

Industrial Machinery – equipment requiring space savings without compromising load capacity

 

Robotics – precision robotic arms, automation machinery

 

Aerospace – instrumentation panels, weight-sensitive aviation components

 

Medical Equipment – advanced imaging devices, precision medical instruments

 

Automotive Applications – steering systems, electric motors

 

Semiconductor Manufacturing Equipment – precision wafer processing, chip packaging

 

Optical Equipment – laser scanners, rotating mirrors, optical encoders

 

Automation Equipment – lightweight robotic arms, precision guidance mechanisms

 

Important Installation Notes

✅ This bearing features an open design – select appropriate lubrication method based on application for flexible lubrication and maintenance.

 

✅ This bearing features an ultra-thin constant section design – ensure shaft and housing fits comply with precision requirements (bore tolerance -0.01mm to 0, OD tolerance -0.01mm to 0).

 

✅ This bearing is single-row and accommodates radial loads and bidirectional axial loads.

 

⚠️ This bearing features a thin section design – use specialized installation tools and avoid excessive force that could cause bearing deformation.

 

⚠️ This bearing has no preload setting – if paired configurations or specific preload are required, adjust based on application requirements.

 

✅ Installation in a clean environment is recommended to prevent contaminant ingress that could affect performance.

 

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 KDN.K02508CP0 bearing is manufactured to strict Japanese quality standards – from ring material (high-purity AISI 52100 chrome steel) and rolling elements to superfinishing processes. The combination of ultra-thin constant section design, chrome steel rings and balls, brass cage, ABEC-1 precision class, and open design makes this bearing the flagship precision bearing in the NMT thin section bearing series – offering the perfect balance of compact design, lightweight construction, and high precision performance.

 

Choose NMT KDN.K02508CP0 for:

 

✅ Ultra-thin constant section design – compact space, lightweight

 

✅ Chrome steel material – high hardness, wear resistance, extended life

 

✅ 562 lbf (2.5 kN) radial load capacity – thin section, not thin capacity

 

✅ Bidirectional axial load capacity – flexible combined load handling

 

✅ ABEC-1 high precision class – precise smooth motion

 

✅ Low friction characteristics – high efficiency operation

 

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

 

✅ RoHS compliant

 

✅ Japanese precision manufacturing quality