Overview

This technical document provides comprehensive dimensional specifications for water pump bearings, focusing on the Ball-Ball "WB" Series and Ball-Roller and Ball-Ball "WR" Series. It serves as a detailed reference catalog listing boundary dimensions for various bearing models identified by unique codes (e.g., KML numbers).

1. Product Series and Application

The bearings covered are designed specifically for water pump applications, arranged in ball-ball or ball-roller configurations to support radial and axial loads. The "WB" series emphasizes ball-ball arrangements, while the "WR" series includes both ball-ball and ball-roller types.

2. Dimensional Specifications

The core content consists of tabulated boundary dimensions in millimeters for each bearing model. Key parameters include:

• D: Outer diameter
• L: Length or width
• A: Axial or overall length dimension
• d: Bore (inner) diameter
• B, C: Additional geometric dimensions related to bearing structure
• d1, d2: Secondary diameters or features
• S1, S2: Thickness, shoulder, or flange dimensions
• E: Eccentricity or offset dimension

Not all parameters are present for every model, reflecting design variations or optional features.

3. Bearing Model Range and Variants

The document lists a wide range of models with sizes spanning from small (e.g., WB1224080 with D=24 mm) to larger bearings (e.g., WR series with D up to 55 mm). Lengths vary broadly, indicating different bearing widths and load capacities.

Model numbers include suffixes such as "-1", "-2", "D", "DD", "H", and "OS" that denote design variants, double-row configurations, or specific dimensional modifications.

4. Data Highlights and Observations

• Outer diameters (D) typically range from 24 mm to over 55 mm depending on series and model.
• Bore diameters (d) generally vary between 12 mm and 25 mm, matching standard shaft sizes.
• Axial lengths (A) and widths (L) vary widely, reflecting different bearing thicknesses and load ratings.
• Additional dimensions (B, C, d1, d2, S1, S2, E) provide detailed geometry for precise fitting and mounting.
• Variants with suffixes indicate subtle dimensional or design differences important for correct application.

5. Usage Recommendations and Best Practices

• Careful verification of all dimensional parameters is essential before selecting a bearing to ensure compatibility with shaft and housing dimensions.
• Consider the specific variant suffixes to select the correct subtype matching the pump design and operational requirements.
• Use the dimensional data in conjunction with load, speed, and environmental factors to optimize bearing performance and longevity.
• Verify dimensional tolerances and compatibility during assembly to avoid fitment issues.

6. Limitations and Scope

The document is primarily a dimensional catalog and does not include material specifications, load ratings, performance data, or installation procedures. For comprehensive bearing selection, these factors must be considered alongside the provided dimensions.

7. Summary

• Series Covered: WB Ball-Ball and WR Ball-Ball/Ball-Roller water pump bearings.
• Content: Detailed boundary dimensions for multiple bearing models and variants.
• Purpose: Enable precise selection and specification of bearings for water pump assemblies.
• Key Parameters: Outer diameter, bore diameter, length, and additional geometric features.
• Application: Bearings designed to support radial and axial loads in water pumps with exact dimensional compatibility.

This document is a critical reference for engineers and designers involved in water pump bearing selection, ensuring proper fit and function through detailed dimensional data.