NMT Ltd.
Corporate Communications Department
NMT KDN.KAA10XL0 Four-Point Contact Thin Section Bearing – The Benchmark for Inch-Size Precision Thin-Wall Design
In aerospace, robotic joints, and high-end medical equipment—applications where space and weight are at a premium—every millimeter saved translates to a leap in performance. NMT (Japan Enmuti) KDN.KAA10XL0 four-point contact ball bearing, with its inch-size constant-section thin-wall design, delivers a reliable precision transmission solution for the most compact scenarios.
Product Overview
The KDN.KAA10XL0 is a constant-section thin-section four-point contact ball bearing (Type X) , built on the principle that "a single cross-section remains constant as the bore diameter increases". Featuring an inch measurement system, it achieves an ultra-thin cross-section at a 1-inch bore diameter and serves as an ideal replacement for international brands such as the KAYDON Reali-Slim® series.
Basic Dimensions:
Parameter Value Unit
Bore diameter (d) 25.4 (1 inch) mm
Outside diameter (D) 34.925 (1.375 inch) mm
Width (B) 4.763 (0.1875 inch) mm
Radial cross-section (H) 4.763 mm
Contact angle 30° —
Number of rows Single row —
Performance Data:
Parameter Value Unit
Dynamic load rating (radial, CK) 1.1 kN
Static load rating (radial, C₀) 1.29 kN
Static load rating (axial, C₀a) 3.25 kN
Dynamic load rating (moment, Cₘ) 0.0124 kN·m
Static load rating (moment, C₀M) 0.0192 kN·m
Technical Features
1. Four-Point Contact Design – Comprehensive Load Capacity
As a Type X four-point contact ball bearing, the KDN.KAA10XL0 simultaneously accommodates radial loads, bidirectional axial loads, and moment loads. A single bearing replaces the need for paired angular contact ball bearings, significantly reducing the required axial space. The balls contact the raceways at four points, ensuring stable operation under various load directions.
2. Inch-Size Constant Thin Section – Ultimate Compactness
This bearing belongs to the KAA 3/16" x 3/16" series, with a radial cross-section of just 3/16 inch (4.763 mm). The constant-section design means the cross-section remains unchanged as the bore diameter increases, allowing designers to use the same thin-profile series across different joint sizes. Net weight is only approximately 0.0136 kg, offering exceptional lightweight advantages.
3. Precision Manufacturing – Reliable and Durable
Material: Bearing steel (chrome steel)
Cage: Non-metallic composite (nylon)
Seal Type: Open (unsealed)
Accuracy Class: ABEC-1
Radial Clearance: 0.0000 – 0.0005 inch
Operating Temperature Range: -30°C ~ 110°C
The bearing is RoHS compliant. The open-type, uncoated, and unlubricated design allows users to configure lubrication solutions flexibly based on actual operating conditions.
4. International Interchangeability
KDN.KAA10XL0 is interchangeable with equivalent models from the following brands: KAYDON KAA10XL0, RBC KAA10XL0*RBC, INA CSXAA10, NSK NBX2504, SSB RAA10XL0, SILVER SAA10XL0, among others, providing users with flexible international procurement alternatives.
Application Scenarios
With its inch-size thin section, ultra-lightweight, and high-load-capacity characteristics, the KDN.KAA10XL0 is widely used in:
Aerospace: satellite mechanisms, lightweight precision components for aircraft
Industrial robot joints: collaborative robots, compact manipulators
Medical devices: surgical robots, advanced imaging equipment
Industrial machinery: compact equipment with space constraints
Optical and inspection equipment: precision positioning stages
Automation systems: material handling and light assembly applications