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Super Precision Angular Contact Ball Bearings S7028 CD/P4AQBCA

Super Precision Angular Contact Ball Bearings S7028 CD/P4AQBCA

The S7028 CD/P4AQBCA is a super precision angular contact ball bearing with a 140mm bore and 210mm outer diameter, crafted from durable chrome steel. It handles radial loads up to 90675 lbf and operates smoothly at speeds up to 11000 RPM.

Its sealed design keeps grease in and contaminants out, while the phenolic cage ensures quiet, long-lasting performance. The bearing works reliably in temperatures from -30°C to 110°C.

This set includes four matched bearings with a 15° contact angle, ideal for high-precision applications like machine tool spindles. The extra-light preload (Class A) ensures minimal friction and precise alignment.

Weighing 13.8kg, it’s robust yet designed for precision. Compliant with P4A tolerance standards, it’s interchangeable with SKF bearings for easy replacements. Perfect for demanding industrial or aerospace uses.

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Product Parameters

  • Part Number S7028 CD/P4AQBCA
  • 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 132 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 Sealed
  • Matched Arrangement 4 bearings <<>> QBC
  • Number Of Bearings In Matched Set 4
  • 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 90675 lbf
  • Static Radial Load 147375 lbf
  • Lubrication Grease
  • Temperature Range - 30°C to 110 °C
  • Max Speed 11000 rpm
  • Weight 13.8 kg
Super Precision Angular Contact Ball Bearings S7028 CD/P4AQBCA dimension drawing
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Features

Why Choose S7028 CD/P4AQBCA Bearing for Precision Tasks?

S7028 CD/P4AQBCA Bearing features a 15° contact angle, optimised for high-precision angular contact applications.
Its chrome steel rings and balls ensure durability, while the phenolic cage reduces friction and noise.

With a dynamic radial load capacity of 90675 lbf, it handles demanding operations smoothly.
The sealed design and grease lubrication minimise maintenance, even at speeds up to 11,000 rpm.

S7028 CD/P4AQBCA Bearing operates reliably in temperatures from -30°C to 110°C.
Its P4A tolerance class guarantees consistent performance in precision machinery.

Application

Super Precision Angular Contact Ball Bearings S7028 CD/P4AQBCA is commonly used in high-precision machine tools, where its 15° contact angle ensures accurate radial and axial load handling. The sealed design keeps contaminants out, extending service life in demanding workshop conditions.

In robotics, S7028 CD/P4AQBCA excels in articulated arms, providing smooth motion control thanks to its matched bearing arrangement. The phenolic cage reduces friction, making it ideal for repetitive, high-speed movements.

For medical imaging systems like CT scanners, S7028 CD/P4AQBCA’s P4A tolerance class delivers the precision needed for consistent, vibration-free operation. Its grease lubrication ensures quiet performance in sensitive environments.

The bearing’s extra light preload makes it a good fit for aerospace applications, such as helicopter rotor systems, where weight and precision are critical. The chrome steel construction handles both dynamic and static loads reliably.

In semiconductor manufacturing equipment, S7028 CD/P4AQBCA supports wafer handling mechanisms with minimal deflection. The metric dimensions simplify integration into European and Asian-designed machinery.

Q&A

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