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Super Precision Angular Contact Ball Bearings S71921 CD/HCP4A

Super Precision Angular Contact Ball Bearings S71921 CD/HCP4A

The S71921 CD/HCP4A is a super precision angular contact ball bearing with a 105mm bore and 145mm outer diameter, designed for high-performance applications. Its compact 20mm width makes it suitable for space-constrained setups.

With a 15° contact angle and ceramic balls, it handles radial loads up to 13905 lbf and spins smoothly at 10000 RPM. The phenolic cage and sealed design ensure quiet operation and reduced maintenance.

This bearing comes preloaded and matched for precision alignment, ideal for machine tools or high-speed spindles. It operates reliably in temperatures from -30°C to 110°C.

Weighing 0.71kg, it meets P4 tolerance standards for exceptional accuracy. Compatible with SKF bearings, it’s a versatile choice for demanding industrial use.

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Product Parameters

  • Part Number S71921 CD/HCP4A
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 105 mm
  • Bore Dia Tolerance -0.008mm to 0
  • Outer Dia 145 mm
  • Outer Dia Tolerance -0.009mm to 0
  • Width 20 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 12.7 mm
  • Ball Qty 27
  • Contact Angle 15°
  • Tolerance Class P4 (ABEC-7)
  • System of Measurement Metric
  • Seal Type Sealed
  • Matched Arrangement Available
  • Preload Available
  • For Load Direction Angular Contact
  • Ring Material Chrome Steel
  • Ball Material Ceramic
  • Cage Material Phenolic
  • Dynamic Radial Load 13905 lbf
  • Static Radial Load 15638 lbf
  • Lubrication Lubricated
  • Temperature Range -30° to 110 °C
  • Max Speed 10000 rpm
  • Weight 0.71 kg
  • Price（$） 1562.652
Super Precision Angular Contact Ball Bearings S71921 CD/HCP4A dimension drawing
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Features

Why Choose S71921 CD/HCP4A Bearing for Precision Tasks?

S71921 CD/HCP4A Bearing features a 15° contact angle, optimised for high-precision angular contact applications.
Its ceramic balls and chrome steel rings ensure minimal friction and enhanced durability.

The phenolic cage in S71921 CD/HCP4A Bearing maintains ball alignment, reducing wear during high-speed operation.
With a maximum speed of 10,000 rpm, it delivers reliable performance in demanding conditions.

S71921 CD/HCP4A Bearing’s P4 tolerance class guarantees exceptional accuracy for precision instruments.
Its dynamic radial load capacity of 13,905 lbf ensures stability under heavy loads.

The sealed design of S71921 CD/HCP4A Bearing protects against contaminants, extending service life.
It operates efficiently within a temperature range of -30° to 110°C, suitable for various environments.

Application

Where Is S71921 CD/HCP4A Bearing Used?
S71921 CD/HCP4A Bearing is commonly used in high-precision machine tools, where its angular contact design ensures accurate spindle rotation. The ceramic balls reduce friction, making it ideal for high-speed operations.

In aerospace applications, S71921 CD/HCP4A Bearing supports critical components like turbine shafts, thanks to its reliable performance under radial and axial loads. Its P4 tolerance class guarantees the precision needed in demanding environments.

For medical imaging devices, S71921 CD/HCP4A Bearing’s sealed design keeps contaminants out, ensuring smooth operation. The phenolic cage adds durability, making it suitable for long-term use in sensitive equipment.

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