Company Overview

TPI is a prominent Taiwanese bearing manufacturer founded in 1966, headquartered in Taipei. It operates three factories in Taiwan and Shanghai, with a fourth under construction in Indonesia (expected 2017). The company specializes in deep groove ball bearings (DGBB), angular contact ball bearings (ACBB), and fluid dynamic bearings, boasting monthly production capacities exceeding 16 million DGBB and 10 million ACBB units.

Industry Applications

TPI bearings serve diverse sectors including automotive, two-wheelers, motors, machine tools, sports equipment, and the integrated circuit (IC) industry. Both standard and customized bearings are offered to meet specific client needs.

Product Range

• Single-row Deep Groove Ball Bearings (10mm to 70mm diameter)
• Miniature and Extra Small Ball Bearings
• Needle Roller Bearings
• Angular Contact Ball Bearings (series BS, 70C, 70AD, 70A, HS CE1, 72C, 72A)
• Cylindrical Roller Bearings

Services and Capabilities

TPI provides comprehensive bearing solutions including a dedicated test center for application analysis and problem-solving. Accessories such as cages, shields, steel balls, seals, and rivets are available. Customized bearing solutions address unique client requirements.

Technical Specifications and Data

The document presents detailed technical data for single-row deep groove ball bearings categorized by bore diameter ranges (10-20mm, 22-35mm, 40-70mm). Key parameters include:

• Boundary dimensions: inner diameter, outer diameter, width
• Basic dynamic (Cr) and static (Cor) load ratings
• Limiting speeds for grease and oil lubrication
• Bearing types and designations: open, shielded (ZZ), sealed (LLB, LLH, LLU)
• Snap ring groove dimensions and mounting details
• Fillet radii and chamfer dimensions
• Equivalent bearing load formulas for dynamic and static conditions

Additional appendices cover ball screw support and spindle bearing selection criteria, dimensional tolerances for housing bores and shafts, and bearing tolerance standards.

Quality and Recognition

TPI has earned multiple awards including TOP 100 Taiwan Brand (2011), Taiwan Mittelstand Award (2013), and Taiwan Excellence Award (2015). The company emphasizes quality and long-term partnerships with global brands.

Technical Summary of Bearing Specifications and Parameters

1. Bearing Types and Variants

Various ball bearing types are detailed: single-row deep groove, miniature, needle roller, and angular contact ball bearings. Seal variants include open, shielded (ZZ), non-contact sealed (LLB), low torque sealed (LLH), and contact sealed (LLU).

2. Dimensional Specifications

Critical dimensions such as bore diameter (d), outer diameter (D), width (B), fillet radii, snap ring grooves, and abutment dimensions are specified to ensure proper fit and function.

3. Load Ratings and Equivalent Loads

Basic dynamic (Cr) and static (Cor) load ratings are provided in Newtons. Equivalent bearing loads are calculated using formulas involving radial (Fr) and axial (Fa) loads with factors X and Y, which vary by bearing type and load conditions.

4. Limiting Speeds and Lubrication

Maximum operational speeds under grease and oil lubrication are specified to ensure bearing longevity and performance.

5. Seal and Shield Characteristics

Seal types influence protection against contaminants, torque, and speed capabilities. Dimensions and descriptions for each seal variant are included.

6. Snap Ring and Groove Details

Snap ring groove dimensions and sizes are provided for axial retention in assemblies.

7. Weight and Space Capacity

Approximate weights and space capacities (cm³) assist in design considerations related to mass and volume.

8. Special Series and Applications

Special series bearings with unique dimensions or enhanced features are available on request. Angular contact ball bearings with various contact angles and configurations (back-to-back, face-to-face) are detailed with corresponding load factors.

9. Tables and Data Interpretation

Extensive tabular data lists dimensions, load ratings, speeds, and load calculation factors (X and Y) for various bearing sizes and types, serving as a reference for selection based on mechanical requirements.

Angular Contact Ball Bearings 70 Series Technical Summary

1. Bearing Types and Dimensions

Detailed specifications for 70C, 70AD, 70A, HS CE1, and 72C series angular contact ball bearings are provided, covering bore diameters from 10 mm to 100 mm. Key dimensions include bore diameter, outer diameter, width, and various radii for precise fitting.

2. Load Ratings and Capacities

Dynamic (Cr) and static axial (Cor) load ratings are given in kN and kgf, indicating radial and axial load capacities essential for bearing selection.

3. Load Calculation Factors (X and Y)

Factors X and Y are tabulated for calculating static equivalent load (P0 = X0 * Ft + Y0 * Fa), varying by contact angle, bearing arrangement (single, back-to-back, face-to-face, tandem), and axial-to-radial load ratio (Fa/Fr) relative to threshold e.

4. Contact Angles and Load Ratios

Contact angles of 15°, 18°, 25°, 30°, and 40° influence load distribution and bearing performance. Application of X and Y factors depends on whether Fa/Fr is below or above threshold e.

5. Boundary and Reference Dimensions

Precise boundary dimensions such as minimum/maximum radii, shoulder heights, and load center distances ensure proper mounting and operation.

6. Limiting Speeds and Lubrication

Maximum recommended rotational speeds under grease and oil lubrication are specified to prevent premature failure.

7. Weight and Space Capacity

Approximate weights and space capacities (cm³) support design considerations involving mass and volume constraints.

8. Bearing Numbering and Series Identification

Bearing numbers correspond to specific sizes and series (e.g., 7000C, 7000AD), facilitating identification and ordering.

Angular Contact Ball Bearings Specifications (72C and 72A Series)

Specifications for 72C (10-100 mm bore) and 72A (10-50 mm bore) series include dynamic and static load ratings, boundary dimensions, limiting speeds, lubrication conditions, and space capacities. Load calculation factors X and Y are provided for various bearing arrangements and contact angles.

Cylindrical Roller Bearings Specifications

Details for cylindrical roller bearings with bore diameters from 80 mm to 130 mm include dynamic and static load ratings, boundary dimensions, roller diameters, and limiting speeds. Bearing types NN3016K to NN3026K are listed with corresponding parameters.

Dimensional Tolerances for Bearings

Appendices specify dimensional tolerances for housing bores and shafts critical for proper bearing fit and performance. Tolerances are given in micrometers for various diameter ranges and tolerance classes (f5, g5, h6, k6, m6, n6, p6, r6), covering bore diameter deviations, radial runout, and width variations.

Tolerance Classes and Limits

• Classes 0, 4, 5, 6, and 41 with specific tolerance values for bore and shaft diameters and runout.
• Separate tolerances for inner and outer ring components.
• Special notes clarify application conditions for different bearing types.

Required Information for Bearing Selection

Appendices I and II list essential data for selecting ball screw support and spindle bearings, including machine type, spindle orientation and diameter, bearing type and preload, lubrication method, load conditions, material and tolerance specifications, speed, rigidity, preload, life expectancy, and special requests.

Key Selection Parameters

• Machine and spindle details
• Bearing arrangement and preload system
• Lubrication type (grease, oil, air-oil, oil mist)
• Load conditions: radial, axial, moments, tightening force
• Material and tolerance specifications
• Environmental conditions (ambient temperature)

Overview of Tolerance Specifications

The document defines tolerance classes (0, 2, 4, 5, 6, UP) with limits for outer/inner ring width deviation, axial and radial runout, diameter deviations, width variation, and surface inclination. These parameters ensure interchangeability and performance across bearing types including deep groove ball bearings, angular contact ball bearings, cylindrical roller bearings, and ball screw support bearings.

Dimensional Deviations and Runout

• Outer ring width deviation ranges from 1.5 μm to 20 μm depending on class and size.
• Axial and radial runout tolerances are tighter for higher classes and vary by bearing size.
• Diameter deviations for bore and outside diameters are specified per class and size.

Width Variation and Surface Inclination

Controlled to maintain bearing performance and fit, aligned with width deviations and runout limits.

Application Notes and Special Conditions

• Dimensional differences for outer diameter vary by class and diameter series.
• Runout tolerances apply specifically to certain bearing types.
• Some tolerances apply only when snap rings are absent.
• Nominal diameters as small as 2.5 mm are included.

Company Profile and Services

TPI Bearings is a leading manufacturer specializing in deep groove and angular contact ball bearings, operating factories in Taiwan and China, with expansion planned in Indonesia. The company offers standard and customized bearings, accessories, and testing services to support client applications.

Industry Applications and Recognition

TPI bearings are widely used in automotive, motor, machine tools, and sports equipment industries. The company has received awards such as Taiwan Excellence, recognized for precision, technology, and innovation.

Contact Information

Headquarters and factories are located in Taipei, Taoyuan, Zhongli (Taiwan), and Shanghai (China), with contact details provided.

Critical Information Summary

• Tolerances are strictly defined by bearing class and size to ensure interchangeability and performance.
• Runout and dimensional deviations are critical for bearing fit and function.
• Load ratings and calculation factors enable precise bearing selection and load analysis.
• Detailed selection criteria support tailored bearing solutions for various applications.
• Testing and customization services enhance application support.

This document serves as a comprehensive technical reference for engineers and designers involved in bearing selection, installation, and maintenance, emphasizing load capacities, dimensional accuracy, and application-specific requirements.