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Super Precision Angular Contact Ball Bearings 7028 CDGA/HCP4A

Super Precision Angular Contact Ball Bearings 7028 CDGA/HCP4A

The 7028 CDGA/HCP4A is a super precision angular contact ball bearing with a 140mm bore and 210mm outer diameter, crafted from high-quality chrome steel. Its compact 33mm width makes it suitable for space-conscious applications.

With a 15° contact angle, it handles radial loads up to 34425 lbf and spins smoothly at 6300 RPM. The ceramic balls and phenolic cage ensure quiet operation and reduced friction.

This open-design bearing comes pre-lubricated for easy installation. It performs reliably in temperatures from -30°C to 110°C and meets strict P4A tolerance standards.

Ideal for precision machinery like spindles or CNC equipment, it can be arranged back-to-back, face-to-face, or tandem. Weighing 2.83kg, it offers robust performance in a manageable size.

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Product Parameters

  • Part Number 7028 CDGA/HCP4A
  • 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 33 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 No
  • Number Of Bearings In Matched Set 3
  • 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 34425 lbf
  • Static Radial Load 37350 lbf
  • Lubrication Lubricated
  • Temperature Range - 30°C to 110 °C
  • Max Speed 6300 rpm
  • Weight 2.83 kg
Super Precision Angular Contact Ball Bearings 7028 CDGA/HCP4A dimension drawing
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Features

Performance Features of 7028 CDGA/HCP4A Bearing

7028 CDGA/HCP4A Bearing is crafted with chrome steel rings and ceramic balls, offering high precision and durability.
Its 15° contact angle ensures efficient handling of combined radial and axial loads.

The phenolic cage maintains ball alignment, reducing friction and enhancing performance.
With a dynamic radial load capacity of 34425 lbf, it suits demanding applications.

7028 CDGA/HCP4A Bearing operates smoothly at speeds up to 6,300 rpm.
Its temperature range of -30°C to 110°C allows use in various environments.

The P4A tolerance class guarantees superior accuracy for precision tasks.
Its universal matching capability enables flexible arrangement options.

Application

Where Is 7028 CDGA/HCP4A Bearing Used?
7028 CDGA/HCP4A Bearing is commonly used in high-precision machine tools, where its 15° contact angle helps maintain accuracy during heavy cutting operations. The ceramic balls reduce friction, ensuring smoother rotation at high speeds.

In robotics, 7028 CDGA/HCP4A Bearing provides reliable support for articulated arms, thanks to its extra-light preload and phenolic cage. This setup minimises vibration, which is crucial for delicate assembly tasks.

For medical imaging devices like MRI machines, 7028 CDGA/HCP4A Bearing’s P4A tolerance class ensures consistent performance under radial loads. The chrome steel rings and ceramic balls also resist wear in sterile environments.

You’ll find 7028 CDGA/HCP4A Bearing in aerospace applications too, where its tandem arrangement handles thrust loads in turbine systems. The metric dimensions make it easy to integrate with European-engineered components.

In automation lines, 7028 CDGA/HCP4A Bearing supports high-speed spindles for CNC machining. Its open design simplifies lubrication, extending service life in continuous operation.

Q&A

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