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Super Precision Angular Contact Ball Bearings 7028 CD/P4ATBTB

Super Precision Angular Contact Ball Bearings 7028 CD/P4ATBTB

The 7028 CD/P4ATBTB is a super precision angular contact ball bearing with a 140mm bore and 210mm outer diameter, crafted from high-quality chrome steel. It handles radial loads up to 74700 lbf and operates smoothly at speeds up to 6300 RPM.

Its 15° contact angle and matched set of three bearings provide excellent stability for angular loads. The phenolic cage ensures durability and reduces friction during high-speed operations.

Designed for light preload, this bearing is ideal for precision applications like machine tool spindles or high-performance motors. It works reliably in temperatures from -30°C to 110°C.

Weighing 10.3kg, this model is interchangeable with SKF bearings, making it a practical choice for replacements. Its open design allows for easy lubrication and maintenance.

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Product Parameters

  • Part Number 7028 CD/P4ATBTB
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 140 mm
  • Bore Dia Tolerance -0.004mm to 0
  • Outer Dia 210 mm
  • Outer Dia Tolerance -0.004mm to 0
  • Width 99 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 22.225 mm
  • Ball Qty 22
  • 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 Light / Class B
  • For Load Direction Angular Contact
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Phenolic
  • Dynamic Radial Load 74700 lbf
  • Static Radial Load 112500 lbf
  • Lubrication Lubricated
  • Temperature Range - 30°C to 110 °C
  • Max Speed 6300 rpm
  • Weight 10.3 kg
Super Precision Angular Contact Ball Bearings 7028 CD/P4ATBTB dimension drawing
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Features

Performance Features of 7028 CD/P4ATBTB Bearing

7028 CD/P4ATBTB Bearing is designed with a 15° contact angle, optimising load distribution for precision applications.
Its chrome steel rings and balls ensure durability under dynamic radial loads up to 74,700 lbf.

The phenolic cage maintains ball alignment, reducing friction and enhancing smooth operation.
With a maximum speed of 6,300 rpm, it balances high performance and reliability.

This bearing set includes three matched units, providing consistent performance in demanding conditions.
Its P4A tolerance class ensures exceptional precision for critical applications.

Application

Industrial Uses of 7028 CD/P4ATBTB 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 stability in heavy cutting operations.

In aerospace applications, 7028 CD/P4ATBTB Bearing handles radial and axial loads in turbine systems. Its phenolic cage offers lightweight durability, ideal for high-speed environments.

For robotics, 7028 CD/P4ATBTB Bearing’s light preload reduces friction in articulated arms. The P4A tolerance class ensures consistent performance in automated assembly lines.

Medical imaging devices benefit from 7028 CD/P4ATBTB Bearing’s smooth operation. The chrome steel construction resists wear in frequent-use scenarios like CT scanners.

In electric motors, 7028 CD/P4ATBTB Bearing supports high-speed shafts with minimal vibration. The open design allows for easy lubrication, extending service life.

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