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Super Precision Angular Contact Ball Bearings S71904/VA9D1

Super Precision Angular Contact Ball Bearings S71904/VA9D1

The S71904/VA9D1 is a super precision angular contact ball bearing with a 20mm bore and 37mm outer diameter, designed for high-speed applications. It features a 25° contact angle and sealed design, ensuring smooth operation with minimal maintenance.

Made from durable chrome steel with a phenolic cage, it handles radial loads up to 1287 lbf and spins at speeds up to 75,000 RPM. The grease lubrication keeps it running smoothly in temperatures from -30°C to 110°C.

Its P4 tolerance class ensures high precision, while the 15 balls (4.762mm each) provide balanced performance. The bearing can be used in matched sets for back-to-back, face-to-face, or tandem arrangements.

Ideal for precision machinery like spindles or CNC tools where accuracy and speed are crucial. Weighing just 0.037kg, it’s lightweight yet robust for demanding applications.

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Product Parameters

  • Part Number S71904/VA9D1
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 20 mm
  • Bore Dia Tolerance -0.004mm to 0
  • Outer Dia 37 mm
  • Outer Dia Tolerance -0.004mm to 0
  • Width 9 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 4.762 mm
  • Ball Qty 15
  • Contact Angle 25°
  • Tolerance Class P4
  • System of Measurement Metric
  • Seal Type Sealed
  • Matched Arrangement No
  • Number Of Bearings In Matched Set 4
  • Universal Matching Bearing Yes, back-to-back (<>), face-to-face (><) or tandem (>>)
  • Preload Available
  • For Load Direction Angular Contact
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Phenolic
  • Dynamic Radial Load 1287 lbf
  • Static Radial Load 686 lbf
  • Lubrication Grease
  • Temperature Range - 30°C to 110 °C
  • Max Speed 75000 rpm
  • Weight 0.037 kg
Super Precision Angular Contact Ball Bearings S71904/VA9D1 dimension drawing
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Features

How Does S71904/VA9D1 Bearing Achieve Super Precision?

S71904/VA9D1 Bearing features a 25° contact angle, optimised for high-precision angular contact applications.
Its chrome steel rings and balls ensure durability and smooth operation under dynamic radial loads up to 1287 lbf.

The sealed design and grease lubrication allow S71904/VA9D1 Bearing to maintain performance at speeds up to 75,000 rpm.
Its phenolic cage minimises friction, contributing to quieter operation and extended service life.

S71904/VA9D1 Bearing operates efficiently within a temperature range of -30°C to 110°C.
With a P4 tolerance class, it delivers consistent precision for demanding applications.

Application

Industrial Uses of S71904/VA9D1 Bearing
S71904/VA9D1 Bearing is commonly used in high-speed machine spindles, where its precision angular contact design ensures accurate rotation. The sealed construction helps maintain performance in environments with dust or debris.

In robotics, S71904/VA9D1 Bearing provides smooth motion control for articulated arms, thanks to its 25° contact angle. The phenolic cage reduces friction, making it ideal for repetitive movements.

For medical imaging devices, S71904/VA9D1 Bearing’s P4 tolerance class ensures the quiet operation needed for sensitive equipment. Its grease lubrication also minimises maintenance requirements in sterile environments.

Automotive vs Aerospace: Applications of S71904/VA9D1 Bearing
In automotive systems, S71904/VA9D1 Bearing supports components like turbochargers, where high-speed performance is critical. The chrome steel construction offers durability under demanding conditions.

Aerospace applications benefit from S71904/VA9D1 Bearing’s lightweight design and precision, particularly in flight control systems. The temperature range of -30°C to 110°C ensures reliability at various altitudes.

Q&A

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