Company Overview and History

TPI is a prominent Taiwanese bearing manufacturer founded in 1966 through a joint venture with a Japanese bearing company. Headquartered in Taipei, Taiwan, TPI operates three factories (two in Taiwan, one in Shanghai) and is expanding with a fourth factory in Jakarta, Indonesia (operational since 2017). The company specializes in deep groove ball bearings (DGBB) and angular contact ball bearings (ACBB), with monthly production capacities exceeding 16 million and 10 million units respectively. TPI is recognized for quality and long-term partnerships with leading global brands.

Product Range

TPI offers a broad portfolio of bearing products serving industries such as automotive, two-wheelers, motors, machine tools, sports equipment, and the integrated circuit (IC) industry. The product lineup includes:

• Single-row Deep Groove Ball Bearings (diameters 10–70 mm)
• Miniature and Extra Small Ball Bearings
• Needle Roller Bearings
• Angular Contact Ball Bearings (various series including BS, 70C, 70AD, 70A, HS CE1, 72C, 72A)
• Cylindrical Roller Bearings
• Fluid Dynamic Bearings for IC applications

Customization and Services

TPI provides both standard and customized bearings tailored to specific client requirements. The company operates an in-house bearing test center offering investigation and application support to resolve client challenges. Additional bearing accessories such as cages, shields, steel balls, seals, and rivets are available upon request.

Technical Specifications and Data

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

• Boundary dimensions: inner diameter (d), outer diameter (D), width (B), and dimensional tolerances
• Basic dynamic (Cr) and static (Cor) load ratings in Newtons
• Limiting speeds (rpm) for grease and oil lubrication
• Bearing types and designations: open, shielded (ZZ), non-contact sealed (LLB), low torque sealed (LLH), contact sealed (LLU)
• Snap ring groove dimensions and related abutment/fillet dimensions
• Approximate bearing weights

Additional specifications include maximum permissible fillet radii, snap ring dimensions, tolerance classes for housing bores and shafts, and formulas for calculating equivalent dynamic and static bearing loads based on radial and axial forces.

Standards and Quality Recognition

TPI has earned multiple awards recognizing brand and product excellence, including the TOP 100 Taiwan Brand (2011), Taiwan Mittelstand Award (2013), and Taiwan Excellence Award (2015).

Technical Summary of Bearing Specifications and Parameters

1. Bearing Types and Configurations

Detailed specifications cover various ball bearing types such as single-row deep groove ball bearings (sizes d 40–70 mm and miniature sizes d 1.5–9 mm), angular contact ball bearings (BS Series, sizes d 17–60 mm and special series d 8–100 mm), and needle roller bearings. Multiple configurations are available: open, shielded (ZZ), non-contact sealed (LLB), low torque sealed (LLH), and contact sealed (LLU).

2. Dimensional Specifications

Key dimensions include bore diameter (d), outer diameter (D), width (B), and radii (r, rs min, r1s min). Snap ring groove dimensions, abutment, and fillet dimensions are also detailed to ensure proper fit and function.

3. Load Ratings and Equivalent Loads

Dynamic (Cr) and static (Cor) load ratings are specified in Newtons and kilograms-force. Equivalent load calculations use formulas:

• Dynamic equivalent load: Pr = X * Fr + Y * Fa (Fr = radial load, Fa = axial load, X and Y are factors)
• Static equivalent load: Por = 0.6 * Fr + 0.5 * Fa (used when Por < Fr)

Load factors X and Y depend on contact angle and load ratio, with tables provided for different bearing arrangements.

4. Limiting Speeds and Lubrication

Limiting speeds range from approximately 2,000 rpm to over 40,000 rpm for miniature bearings, varying by size and lubrication type (grease or oil). Recommendations for lubrication are specified to optimize performance.

5. Weight and Space Capacity

Approximate bearing weights (grams to kilograms) and space capacities (cm³) are provided to assist in design considerations for weight- and space-sensitive applications.

6. Special Features and Notes

• Non-standard bearings (marked with *) are available on request.
• Low torque sealed types (LLH) reduce friction for specific applications.
• Snap ring groove dimensions are critical for axial positioning.
• Angular contact ball bearings include data on contact angles and load factors for back-to-back (DB) and face-to-face (DF) arrangements.

7. Summary of Critical Parameters

8. Recommendations and Best Practices

• Select bearing type and sealing based on load, speed, and environment.
• Use load rating formulas for accurate bearing life estimation.
• Consider lubrication type and limiting speeds to optimize performance.
• Verify snap ring and groove dimensions for secure axial retention.
• Request non-standard bearings as needed for specialized applications.

Angular Contact Ball Bearings Technical Data Summary

1. Bearing Series and Dimensions

Specifications cover angular contact ball bearing series such as 70C, 70AD, 70A, HS CE1, and 72C, with bore diameters from 10 mm to 100 mm. Boundary dimensions include outer diameter (D), width (B), and fillet radii.

2. Load Ratings and Capacities

Dynamic load ratings (Cr) and static axial load capacities (Cor) are provided in kN and kgf. For example, the 7000C series ranges from 17.7 kN to 77 kN dynamic load and 15.9 kN to 77 kN static axial capacity.

3. Load Factor Tables (X and Y)

Tables define factors X and Y for calculating static equivalent loads (Po = Xo Ft + Yo Fa) based on contact angle and axial/radial load ratios. Different values apply for single, back-to-back (DB), and face-to-face (DF) arrangements.

4. Contact Angles and Load Ratios

Contact angles typically range from 15° to 40°, affecting load distribution. Guidance is provided on applying load factors depending on whether axial load ratio (Fa/Fr) is below or above threshold values.

5. Limiting Speeds and Lubrication

Maximum recommended speeds (rpm) vary by bearing size, series, and lubrication type, with oil lubrication generally allowing higher speeds than grease.

6. Reference and Abutment Dimensions

Additional dimensions such as d1, d2, D1, D2, da, Da, Db, and fillet radii assist in proper mounting and housing design.

7. Weight and Space Capacity

Approximate weights and space capacities (cm³) are listed to support design constraints.

Critical Information and Best Practices

• Use correct load factors based on bearing arrangement and load ratios.
• Consider contact angle and load ratios for optimal bearing selection.
• Adhere to limiting speeds to prevent premature failure.
• Verify boundary and abutment dimensions during installation.
• Select bearings based on dynamic and static load ratings matching application needs.

Angular Contact Ball Bearings Specifications

Detailed specs for 72C and 72A series angular contact ball bearings include:

• Dynamic load ratings: 6,600 N to 55,600 N (72C), 8,120 N to 27,700 N (72A)
• Static axial load capacities
• Boundary dimensions (d, D, B, radii)
• Lubrication parameters and limiting speeds

Load Calculation Factors and Contact Angles

Tables provide factors X and Y for static equivalent load calculations across bearing arrangements (single, DB, DF, DT), considering contact angles and axial/radial load ratios.

Cylindrical Roller Bearings Specifications

Specifications for cylindrical roller bearings (bore diameters 80–130 mm) include dynamic load ratings (4,200 N to 24,300 N), boundary dimensions, approximate open space, weight, and limiting speeds.

Appendices: Selection and Tolerance Guidelines

Appendix I & III: Bearing Selection Information

Selection criteria for ball screw support and spindle bearings include machine type, spindle orientation and diameter, bearing type and preload, lubrication, load conditions, shaft and housing details, speed, rigidity, preload, and life requirements.

Appendix II: Dimensional Tolerances for Housing Bore and Shaft

Tables specify dimensional tolerances by diameter range and tolerance class (e.g., f5, g5, h4, k4, m5, n5, p5, r6) critical for proper bearing fit and performance.

Appendix IV: Bearing Tolerances

Details on bearing tolerance classes (0, 5, 6, etc.) cover bore diameter deviations, radial runout limits, and outer diameter variations to ensure precision and reliability.

Overview of Bearing Tolerance Specifications

The document outlines tolerance classes (Class 0, 2, 4, 5, 6, UP) defining permissible deviations for parameters such as outer/inner ring width deviation, axial and radial runout, diameter deviations, width variation, and surface inclination.

Tolerances vary by bearing type (deep groove ball, angular contact ball, cylindrical roller, ball screw support) and diameter series, with tighter tolerances for smaller diameters and higher classes.

Special conditions include snap ring installation affecting applicable tolerances and dimensional differences for outer diameters depending on diameter series and class.

Company Profile and Services

TPI Bearings, established in 1966, maintains joint ventures and technical agreements with Japanese companies. It produces high-quality deep groove and angular contact ball bearings with factories in Taiwan and Shanghai, and a new facility in Indonesia. The company offers customized bearings, accessories, and a bearing test center for application support.

Contact Information

Addresses and contact details for TPI's headquarters and factories in Taipei, Taoyuan, Zhongli, and Shanghai are provided, including telephone, fax, and website information.

Critical Information Summary

• Tolerances are essential for bearing performance and specified by class and size.
• Axial and radial runout, diameter deviations, and width variations are key controlled parameters.
• Snap ring installation influences applicable tolerances.
• TPI provides comprehensive bearing solutions including testing and customization.
• Load ratings, dimensional data, and lubrication guidelines support optimal bearing selection and application.

This document serves as a comprehensive technical reference for engineers and designers involved in bearing selection, installation, and maintenance, ensuring optimal performance and reliability in mechanical systems.