Bearing Identification and Designations

The document catalogs radial needle roller and cage assemblies using specific bearing codes (e.g., K6X9X8TN1). Each code corresponds to defined dimensions and performance characteristics, facilitating precise identification and selection.

Dimensional Specifications

• Shaft Diameter: Internal diameters range from 3 mm to 70 mm, accommodating various shaft sizes.
• Boundary Dimensions: Outer diameter (Fw), width (Ew), and cage width (Bc) are detailed for each bearing, defining the physical envelope.

Load Ratings

• Dynamic Load Rating (Cr): Expressed in Newtons, this rating indicates the bearing's capacity to endure dynamic operational loads, varying widely by size and type.
• Static Load Rating (Cor): Also in Newtons, this rating reflects the bearing's ability to withstand static or stationary loads.

Lubrication Types

Bearings are specified for either grease or oil lubrication. Lubrication type directly influences limiting speeds and operational behavior, with oil lubrication generally supporting higher speeds.

Limiting Speeds

Maximum permissible rotational speeds (rpm) are provided per bearing and lubrication type. Grease-lubricated bearings have lower speed limits compared to oil-lubricated counterparts, impacting application suitability.

Weight

Each bearing's weight in kilograms is listed, aiding in mechanical design considerations and handling logistics.

Key Observations and Recommendations

• The catalog covers a broad spectrum of bearing sizes and load capacities, suitable for diverse industrial applications.
• Optimal bearing selection requires matching shaft diameter, load requirements (dynamic and static), lubrication method, and limiting speed.
• For high-speed applications, oil lubrication is recommended due to superior speed capabilities.
• Weight data supports integration and mechanical design planning.

Data Presentation and Technical Dataset

The technical data is organized in tables listing bearing codes, dimensions, load ratings, lubrication types, limiting speeds, and weights. This structured format enables efficient comparison and selection.

The dataset includes entries with codes such as "K 70X78X43ZW" and "K 130X137X25," each associated with multiple parameters:

• Dimensions: Three numerical values likely representing length, width, and height or related measures.
• Performance Metrics: Large numerical values indicating load capacities or weights.
• Operational Parameters: Values in the 1300–6000 range, possibly denoting speed limits or other operational constraints.
• Coefficient Values: Decimal numbers (approx. 0.08 to 0.69) suggesting efficiency ratios or performance coefficients.

Additional codes (e.g., SZ-405, 9243/115) may reference manufacturing standards or batch identifiers.

Summary

This document serves as a detailed technical reference for radial needle roller bearings, providing essential mechanical and operational parameters. It supports informed bearing selection, design integration, and performance evaluation across a wide range of industrial applications.