High-Quality Angular Contact Ball Bearings from China Suppliers and Factory for Combined Loads
Angular Contact Ball Bearings Produced Include
🔵
Single-row angular contact ball bearings
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Double-row angular contact ball bearings
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Four-point contact ball bearings
Structural Features of Single-Row Angular Contact Ball Bearings
Single-row angular contact ball bearings can only withstand axial loads acting in one direction. Under radial loads, an axial force is generated within the bearing, which must be counteracted by an opposing force. Therefore, these bearings typically require a second bearing for balance. Single-row angular contact ball bearings can accommodate more balls, providing higher load-carrying capacity.
Contact Angles — Available in Three Variants
15°
Suffix Code: C
25°
Suffix Code: AC
40°
Suffix Code: B
Single-row angular contact ball bearings are classified into non-separable and separable types. Non-separable bearings are further divided into standard, high-speed, and ultra-high-speed series. Separable bearings (inner and outer rings can be installed separately) are used in components with limited installation space, such as magnetos, and are also referred to as magneto bearings.
Cages for Non-Separable Bearings
| Suffix Code | Cage Type | Guidance |
|---|---|---|
| (No suffix) | Fiber-reinforced phenolic resin cage Standard | Guided by the inner ring |
| TA | Fiber-reinforced phenolic resin cage | Guided by the outer ring |
| TN | Glass fiber-reinforced nylon 66 molded cage | — |
| M | Machined brass cage | — |
Cages for Separable Bearings (Magneto Bearings)
- Primarily use glass fiber-reinforced nylon 66 molded cages.
- Stamped brass cages are available upon request.
Bearings with glass fiber-reinforced nylon 66 molded cages are suitable for most applications and can operate normally within a temperature range of:
🌡️ −30°C to +120°C
🌡️ −30°C to +120°C
Four-Point Contact Ball Bearings
Four-point contact ball bearings are a type of single-row angular contact ball bearing with raceways designed to accommodate bidirectional axial loads. These bearings require less axial space compared to double-row bearings.
- Contact angle: 35°
- The inner ring is split into two halves, allowing for a larger number of balls and higher load capacity.
- Bearings are separable — the two halves of the inner ring and the outer ring with the ball and cage assembly can be installed separately.
Double-Row Angular Contact Ball Bearings
Double-row angular contact ball bearings are designed similarly to two single-row angular contact ball bearings arranged back-to-back. Their width is slightly less than two single-row bearings, and the contact angle is 30°. These bearings offer high rigidity, can withstand tilting moments, and are non-separable.
Available design types include:
- With a filling slot on one side: Allows for larger and more balls, enabling higher radial and unidirectional axial load capacity. Typically uses stamped steel or machined brass solid cages. Suitable for low-speed applications.
- Without a filling slot: Can accommodate bidirectional axial loads of equal magnitude. Uses glass fiber-reinforced nylon 66 cages or stamped steel crown cages, resulting in minimal heat generation and lower operating temperatures — particularly advantageous for high-speed operation.
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With shields or seals: Available with shields (non-contact) or seals (contact) on one or both sides. Pre-filled with rust-preventive and lubricating grease (lithium-based #2 grease unless otherwise specified).
🌡️ Operating range: −30°C to +100°C
Permanently lubricated — no maintenance required.
Important Notes
⚠️ Please Read Before Installation & Use
- Do not heat or clean before installation.
- Bearings with shields are primarily suitable for inner ring rotation. If the outer ring rotates at speeds exceeding certain limits, grease may leak.
- For bearings with seals on both sides, the sealing lips contact grooves on the inner ring shoulders. Seals are made of oil-resistant and wear-resistant synthetic rubber, reinforced with steel sheets. Permissible operating temperature for seals: −40°C to +120°C.
- The seals are clamped into grooves on the outer ring shoulders, providing a deformation-free seal. Under extreme conditions (e.g., very high speeds or temperatures), grease may leak from the inner ring. If grease leakage is unacceptable for the application, special design measures may be required.
Frequently Asked Questions (FAQ)
Q
What is the difference between single-row and double-row angular contact ball bearings?
Single-row angular contact ball bearings can only withstand axial loads in one direction and typically require a paired bearing for balance. Double-row angular contact ball bearings function similarly to two back-to-back single-row bearings, offering higher rigidity, the ability to handle tilting moments, and bidirectional axial load capacity — all within a more compact width.
Q
What do the contact angle suffix codes (C, AC, B) mean?
The suffix codes indicate the contact angle of the bearing: C = 15°, AC = 25°, and B = 40°. A larger contact angle provides greater axial load capacity, while a smaller contact angle is better suited for higher rotational speeds.
Q
What are magneto bearings and where are they used?
Magneto bearings are a type of separable single-row angular contact ball bearing where the inner and outer rings can be installed independently. They are designed for components with limited installation space, such as magnetos, and are commonly used in precision applications requiring compact bearing arrangements.
Q
What is the operating temperature range for sealed double-row angular contact ball bearings?
Sealed double-row angular contact ball bearings (with shields or seals) are pre-filled with lithium-based #2 grease and are rated for an operating temperature range of −30°C to +100°C. Bearings with synthetic rubber seals can withstand temperatures from −40°C to +120°C. These bearings are permanently lubricated and maintenance-free.
Q
What are the advantages of four-point contact ball bearings over double-row bearings?
Four-point contact ball bearings can handle bidirectional axial loads — similar to double-row bearings — but require significantly less axial space. Their split inner ring design allows for more balls, resulting in higher load capacity in a more compact form factor, making them ideal for space-constrained applications.
Q
Which cage material is recommended for high-speed angular contact ball bearing applications?
For high-speed applications, glass fiber-reinforced nylon 66 (GF-PA66) molded cages are recommended. They produce minimal heat generation and maintain lower operating temperatures, which is critical at elevated speeds. These cages are suitable for most standard applications and operate reliably within a temperature range of −30°C to +120°C.