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Super Precision Angular Contact Ball Bearings 7221 CDGC/P4A

Super Precision Angular Contact Ball Bearings 7221 CDGC/P4A

The 7221 CDGC/P4A is a super precision angular contact ball bearing with a 105mm bore and 190mm outer diameter, crafted from durable chrome steel. It handles radial loads up to 38700 lbf and operates smoothly at speeds up to 16000 RPM.

With a 15° contact angle and moderate preload, it offers excellent stability for high-precision applications. The open design and phenolic cage ensure reliable performance and easy maintenance.

This bearing is available in matched sets for universal mounting options, including back-to-back or face-to-face arrangements. Ideal for machine tools or spindles where precision and speed are key.

Weighing 3.87kg, it’s robust yet manageable for its size. Compliant with P4A tolerance standards, it’s a top choice for demanding industrial environments.

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Product Parameters

  • Part Number 7221 CDGC/P4A
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 105 mm
  • Bore Dia Tolerance -0.004mm to 0
  • Outer Dia 190 mm
  • Outer Dia Tolerance -0.004mm to 0
  • Width 36 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 26.988 mm
  • Ball Qty 15
  • Contact Angle 15°
  • Tolerance Class P4A
  • System of Measurement Metric
  • Seal Type Open
  • Matched Arrangement Available
  • Number Of Bearings In Matched Set 2
  • Universal Matching Bearing Yes, back-to-back (<>), face-to-face (><) or tandem (>>)
  • Preload Moderate / Class C
  • For Load Direction Angular Contact
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Phenolic
  • Dynamic Radial Load 38700 lbf
  • Static Radial Load 34425 lbf
  • Lubrication Lubricated
  • Temperature Range - 30°C to 110 °C
  • Max Speed 16000 rpm
  • Weight 3.87 kg
Super Precision Angular Contact Ball Bearings 7221 CDGC/P4A dimension drawing
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Features

Engineered for Precision: 7221 CDGC/P4A Bearing

7221 CDGC/P4A Bearing features a 15° contact angle, optimised for high-precision angular contact applications.

The chrome steel construction ensures durability and resistance to wear, even under heavy radial loads up to 38700 lbf.

With a maximum speed of 16,000 rpm, it delivers smooth and efficient performance in demanding conditions.

Its phenolic cage maintains ball alignment, reducing friction and extending operational life.

How Does 7221 CDGC/P4A Bearing Achieve High-Speed Performance?

7221 CDGC/P4A Bearing is designed with a moderate preload (Class C), ensuring stability at high speeds up to 16,000 rpm.

The precision-ground chrome steel balls and raceways minimise vibration, enhancing smooth operation.

Its open design allows for effective lubrication, reducing heat buildup during prolonged use.

The matched arrangement option (back-to-back, face-to-face, or tandem) provides flexibility for various applications.

Structural Advantages of 7221 CDGC/P4A Bearing

7221 CDGC/P4A Bearing’s phenolic cage offers excellent strength and heat resistance, ideal for high-speed applications.

The tight tolerances (P4A class) ensure consistent performance in precision machinery.

With universal matching options, it can be configured for different load arrangements.

Its 105 mm bore and 190 mm outer diameter provide a robust solution for heavy-duty angular contact needs.

Application

Industrial Uses of 7221 CDGC/P4A Bearing
7221 CDGC/P4A Bearing is commonly used in high-precision machine tools, where its angular contact design ensures accurate spindle rotation. The moderate preload helps maintain stability during heavy cutting operations.

In automotive applications, 7221 CDGC/P4A Bearing supports high-speed components like turbochargers and transmission systems. Its phenolic cage reduces friction, making it suitable for demanding environments.

For automation systems, 7221 CDGC/P4A Bearing provides reliable performance in robotic arms and CNC machines. The open seal design allows for easy lubrication, extending service life.

Medical imaging devices benefit from 7221 CDGC/P4A Bearing’s chrome steel construction, which offers consistent performance under radial loads. The P4A tolerance class ensures precision in critical applications.

In aerospace equipment, 7221 CDGC/P4A Bearing handles both radial and axial loads in jet engine components. Its matched arrangement option simplifies installation in complex assemblies.

Q&A

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