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Super Precision Angular Contact Ball Bearings 7021 ACD/HCP4ALDGA

Super Precision Angular Contact Ball Bearings 7021 ACD/HCP4ALDGA

The 7021 ACD/HCP4ALDGA is a super precision angular contact ball bearing with a 105mm bore and 160mm outer diameter, crafted from chrome steel for durability. It features a 25° contact angle and ceramic balls for smooth operation.

With a dynamic radial load capacity of 33300 lbf, it spins efficiently at speeds up to 16250 RPM. The phenolic cage ensures stability, while the open design allows easy lubrication.

This bearing comes in a matched set of two, suitable for universal mounting (back-to-back, face-to-face, or tandem). Ideal for high-precision applications like machine tools or spindles where accuracy is key.

Weighing 2.63kg, it operates in temperatures from -30°C to 110°C, meeting P4A tolerance standards for reliable performance.

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Product Parameters

  • Part Number 7021 ACD/HCP4ALDGA
  • 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 25°
  • Tolerance Class P4A
  • System of Measurement Metric
  • Seal Type Open
  • Matched Arrangement Universal matching
  • Number Of Bearings In Matched Set 2
  • Universal Matching Bearing Yes, back-to-back (<>), face-to-face (><) or tandem (>>)
  • Preload Extra light / Class A
  • For Load Direction Angular Contact
  • Ring Material Chrome Steel
  • Ball Material Ceramic
  • Cage Material Phenolic
  • Dynamic Radial Load 33300 lbf
  • Static Radial Load 41850 lbf
  • Lubrication Lubricated
  • Temperature Range - 30°C to 110 °C
  • Max Speed 16250 rpm
  • Weight 2.63 kg
Super Precision Angular Contact Ball Bearings 7021 ACD/HCP4ALDGA dimension drawing
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Features

Performance Features of 7021 ACD/HCP4ALDGA Bearing

7021 ACD/HCP4ALDGA Bearing features a 25° contact angle, optimised for high-precision angular contact applications.
The chrome steel rings and ceramic balls enhance durability while reducing friction for smoother operation.

With a dynamic radial load capacity of 33,300 lbf, it handles demanding tasks reliably.
The phenolic cage ensures stable performance even at high speeds up to 16,250 rpm.

Designed for universal matching, it supports back-to-back, face-to-face, or tandem arrangements.
Its extra-light preload (Class A) ensures minimal resistance, improving efficiency.

The open seal design allows easy lubrication, maintaining performance in temperatures from -30°C to 110°C.
Precision P4A tolerance guarantees consistent accuracy in high-speed applications.

Application

Industrial Uses of 7021 ACD/HCP4ALDGA Bearing
This bearing is commonly used in high-speed machine tools, where its ceramic balls and phenolic cage reduce friction and heat buildup. The universal matching design allows flexible arrangements for different load requirements.

Where Is 7021 ACD/HCP4ALDGA Bearing Used?
You’ll often find it in precision grinding spindles, where the P4A tolerance ensures minimal vibration. Its extra-light preload makes it ideal for applications demanding smooth, quiet operation.

Built for Heavy-Duty Use: 7021 ACD/HCP4ALDGA Bearing
In industrial gearboxes, this bearing handles both radial and axial loads effortlessly. The chrome steel rings and ceramic balls provide a good balance of strength and durability.

Automotive vs Aerospace: Applications of 7021 ACD/HCP4ALDGA Bearing
In automotive systems, it supports high-performance transmissions, while in aerospace, it’s used in turbine shafts. The wide temperature range (-30°C to 110°C) suits both environments.

Perfect Fit for Automation: 7021 ACD/HCP4ALDGA Bearing
Robotic arms benefit from its high-speed capability and precise angular contact. The lubricated design ensures long service life even in continuous operation.

Q&A

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