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Super Precision Angular Contact Ball Bearings 7021 CD/P4ATBTA

Super Precision Angular Contact Ball Bearings 7021 CD/P4ATBTA

The 7021 CD/P4ATBTA is a super precision angular contact ball bearing with a 105mm bore and 160mm outer diameter, crafted from high-quality chrome steel. It handles radial loads up to 46800 lbf and operates smoothly at speeds up to 16000 RPM.
Its 15° contact angle and matched set of three bearings (arranged > TBT) provide excellent stability and precision. The phenolic cage ensures quiet operation and durability.
Designed for extra light preload (Class A), this bearing is ideal for high-precision applications like machine tool spindles or high-speed robotics. It works reliably in temperatures from -30°C to 110°C.
Weighing 4.78kg, it’s robust yet suitable for precision systems. Compliant with P4A tolerance standards, it’s interchangeable with SKF bearings for easy replacement.

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Product Parameters

  • Part Number 7021 CD/P4ATBTA
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 105 mm
  • Bore Dia Tolerance -0.004mm to 0
  • Outer Dia 160 mm
  • Outer Dia Tolerance -0.004mm to 0
  • Width 78 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 17.462 mm
  • Ball Qty 21
  • Contact Angle 15°
  • Tolerance Class P4A
  • System of Measurement Metric
  • Seal Type Open
  • Matched Arrangement 3 bearings <>> TBT
  • Number Of Bearings In Matched Set 3
  • Universal Matching Bearing No
  • Preload Extra light / Class A
  • For Load Direction Angular Contact
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Phenolic
  • Dynamic Radial Load 46800 lbf
  • Static Radial Load 65250 lbf
  • Lubrication Lubricated
  • Temperature Range - 30°C to 110 °C
  • Max Speed 16000 rpm
  • Weight 4.78 kg
Super Precision Angular Contact Ball Bearings 7021 CD/P4ATBTA dimension drawing
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Features

Performance Features of 7021 CD/P4ATBTA Bearing

7021 CD/P4ATBTA Bearing is designed with a 15° contact angle, optimising load distribution for precision applications.

Its chrome steel construction ensures durability and resistance to wear in high-speed operations.

The phenolic cage maintains ball alignment, reducing friction and enhancing performance.

With a maximum speed of 16,000 rpm, it delivers reliable efficiency in demanding conditions.

How Does 7021 CD/P4ATBTA Bearing Reduce Friction?

7021 CD/P4ATBTA Bearing’s precision-engineered design minimises friction through optimal ball alignment.

The phenolic cage material further reduces friction, ensuring smooth operation even at high speeds.

Its extra light preload (Class A) enhances performance while maintaining low resistance.

This combination makes it ideal for applications requiring both precision and efficiency.

Built for Reliability: 7021 CD/P4ATBTA Bearing

7021 CD/P4ATBTA Bearing’s chrome steel rings and balls provide exceptional strength and durability.

It can handle dynamic radial loads up to 46,800 lbf, ensuring consistent performance under stress.

The P4A tolerance class guarantees high precision, making it suitable for critical applications.

Its temperature range of -30°C to 110°C ensures reliable operation in various environments.

Steel vs Ceramic Bearings: Strengths of 7021 CD/P4ATBTA Bearing

7021 CD/P4ATBTA Bearing’s chrome steel construction offers a balance of strength and affordability.

Unlike ceramic bearings, it provides excellent load capacity (46,800 lbf dynamic radial load).

The phenolic cage adds durability while maintaining smooth operation at speeds up to 16,000 rpm.

This makes it a practical choice for precision applications requiring reliable performance.

Application

Industrial Uses of 7021 CD/P4ATBTA Bearing
This bearing is commonly used in high-precision machine tools, where its angular contact design ensures accurate spindle rotation. The matched set of three bearings provides excellent stability for heavy cutting operations.

Where Is 7021 CD/P4ATBTA Bearing Used?
You’ll often find 7021 CD/P4ATBTA Bearing in aerospace applications, such as helicopter gearboxes, due to its ability to handle both radial and axial loads. Its phenolic cage offers smooth operation at high speeds.

Built for Heavy-Duty Use: 7021 CD/P4ATBTA Bearing
In industrial pumps and compressors, 7021 CD/P4ATBTA Bearing’s chrome steel construction ensures long-lasting performance. The extra light preload makes it ideal for applications requiring minimal friction.

Automotive vs Aerospace: Applications of 7021 CD/P4ATBTA Bearing
While 7021 CD/P4ATBTA Bearing is popular in automotive systems like high-performance transmissions, it also excels in aerospace for its precision. The P4A tolerance class guarantees consistent performance in both fields.

Perfect Fit for Automation: 7021 CD/P4ATBTA Bearing
Robotic arms benefit from 7021 CD/P4ATBTA Bearing’s high-speed capabilities and low friction. The open design allows for easy lubrication, ensuring smooth movement in automated systems.

Q&A

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