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Super Precision Angular Contact Ball Bearings S7021 CD/P4ADGB

Super Precision Angular Contact Ball Bearings S7021 CD/P4ADGB

The S7021 CD/P4ADGB is a super precision angular contact ball bearing with a 105mm bore and 160mm outer diameter, crafted from durable chrome steel. It handles radial loads up to 35100 lbf and operates smoothly at speeds up to 10000 RPM.

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

This model is part of a matched set of two bearings, suitable for universal mounting in back-to-back, face-to-face, or tandem arrangements. Ideal for high-precision machinery like CNC spindles or medical equipment where accuracy is key.

Weighing 3.22kg, it’s robust yet designed for smooth, reliable operation. Compliant with P4A tolerance standards for exceptional precision.

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Product Parameters

  • Part Number S7021 CD/P4ADGB
  • 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 52 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 Sealed
  • Matched Arrangement Universal matching
  • Number Of Bearings In Matched Set 2
  • Universal Matching Bearing Yes, back-to-back (<>), face-to-face (><) or tandem (>>)
  • Preload Light / Class B
  • For Load Direction Angular Contact
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Phenolic
  • Dynamic Radial Load 35100 lbf
  • Static Radial Load 43425 lbf
  • Lubrication Grease
  • Temperature Range - 30°C to 110 °C
  • Max Speed 10000 rpm
  • Weight 3.22 kg
Super Precision Angular Contact Ball Bearings S7021 CD/P4ADGB dimension drawing
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Features

Performance Features of S7021 CD/P4ADGB Bearing

S7021 CD/P4ADGB Bearing is designed with a 15° contact angle, optimising load distribution for angular contact applications.

The sealed design protects against contaminants, ensuring smooth operation in various environments.

With a dynamic radial load capacity of 35100 lbf, it handles demanding conditions reliably.

Its phenolic cage enhances durability and reduces friction, contributing to a longer service life.

How Is S7021 CD/P4ADGB Bearing Engineered for Reliability?

S7021 CD/P4ADGB Bearing features chrome steel rings and balls, providing excellent strength and wear resistance.

The universal matching design allows for flexible arrangements like back-to-back or face-to-face mounting.

Precision P4A tolerance ensures consistent performance in high-speed applications up to 10,000 rpm.

Grease lubrication maintains smooth operation across a temperature range of -30°C to 110°C.

Designed for Durability: S7021 CD/P4ADGB Bearing

S7021 CD/P4ADGB Bearing’s phenolic cage minimises friction and wear, even under heavy radial loads.

Its sealed construction prevents dirt and moisture ingress, enhancing reliability in harsh conditions.

The light preload (Class B) ensures stable operation while reducing vibration and noise.

With 21 chrome steel balls, it balances load distribution for consistent performance.

Steel vs Ceramic Bearings: Strengths of S7021 CD/P4ADGB Bearing

S7021 CD/P4ADGB Bearing uses chrome steel for both rings and balls, offering a cost-effective yet durable solution.

Its high static radial load capacity (43425 lbf) makes it suitable for heavy-duty applications.

The phenolic cage provides better heat resistance compared to metal cages, improving longevity.

Precision-ground components ensure smooth operation, even at speeds up to 10,000 rpm.

Application

Super Precision Angular Contact Ball Bearings S7021 CD/P4ADGB excels in high-speed machine tool spindles, where its 15° contact angle ensures smooth rotation under radial and axial loads. The sealed design keeps contaminants out, extending service life in demanding workshop conditions.

In aerospace applications, S7021 CD/P4ADGB handles precise positioning systems for flight control mechanisms. Its universal matching capability allows flexible arrangement in compact spaces without compromising performance.

For medical imaging devices like CT scanners, S7021 CD/P4ADGB’s phenolic cage reduces vibration during high-speed rotations. The P4A tolerance class guarantees the quiet operation needed for sensitive diagnostic equipment.

Automotive testing rigs benefit from S7021 CD/P4ADGB’s grease lubrication, which maintains stability during prolonged high-RPM simulations. The chrome steel construction withstands rigorous durability testing cycles.

Robotic arms in manufacturing lines utilise S7021 CD/P4ADGB for its light preload and matched set configuration. This ensures consistent precision during repetitive assembly tasks without requiring frequent recalibration.

Q&A

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