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Super Precision Angular Contact Ball Bearings S71921 ACD/HCP4A

Super Precision Angular Contact Ball Bearings S71921 ACD/HCP4A

The S71921 ACD/HCP4A is a super precision angular contact ball bearing with a 105mm bore and 145mm outer diameter, crafted from high-quality chrome steel. It features a 25° contact angle and comes sealed for added protection.

Designed for angular contact loads, it handles dynamic radial loads up to 12870 lbf and operates smoothly at speeds up to 9000 RPM. The ceramic balls and phenolic cage ensure low friction and long service life.

Its P4 tolerance class (ABEC-7) guarantees high precision, making it suitable for demanding applications. Preload and matched arrangements are available for enhanced performance.

Ideal for high-speed spindles, machine tools, or precision equipment where accuracy and reliability are crucial. The bearing is lubricated and works in temperatures from -30°C to 110°C.

Weighing 0.71kg, it’s a robust yet manageable component. Interchangeable with SKF bearings, it offers a reliable replacement option. Compliant with industry standards for safe and efficient use.

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Product Parameters

  • Part Number S71921 ACD/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 25°
  • 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 12870 lbf
  • Static Radial Load 14738 lbf
  • Lubrication Lubricated
  • Temperature Range -30° to 110 °C
  • Max Speed 9000 rpm
  • Weight 0.71 kg
  • Price（$） 1562.472
Super Precision Angular Contact Ball Bearings S71921 ACD/HCP4A dimension drawing
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Features

Why Choose S71921 ACD/HCP4A Bearing for Precision Tasks?

S71921 ACD/HCP4A Bearing features a 25° contact angle, ideal for handling combined radial and axial loads with high precision.
Its ceramic balls and chrome steel rings ensure minimal friction and extended service life.

The phenolic cage maintains ball alignment, enhancing stability even at high speeds up to 9,000 rpm.
With a P4 tolerance class, it delivers consistent performance in demanding applications.

Sealed design and preload availability make S71921 ACD/HCP4A Bearing suitable for matched arrangements.
Its dynamic radial load capacity of 12,870 lbf ensures reliability in precision machinery.

Application

Key Fields for S71921 ACD/HCP4A Bearing
S71921 ACD/HCP4A Bearing is widely 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 ACD/HCP4A Bearing supports critical components like turbine shafts, thanks to its reliable performance under heavy loads. The phenolic cage adds durability in demanding environments.

For robotics, S71921 ACD/HCP4A Bearing provides smooth motion in articulated arms, enhancing precision in automated tasks. Its sealed design keeps contaminants out, extending service life.

Medical imaging devices benefit from S71921 ACD/HCP4A Bearing’s low vibration, ensuring clear scans. The P4 tolerance class guarantees consistent performance in sensitive equipment.

In electric vehicles, S71921 ACD/HCP4A Bearing improves efficiency in motor systems, reducing energy loss. Its lubricated design ensures quiet operation, enhancing driver comfort.

Q&A

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