HCB71909-C-T-P4S-UL Angular Contact Ball Bearing
|
Brand |
= |
SEMRI |
|
Manufacturer Part Number |
= |
HCB71909-C-T-P4S-UL |
|
Inside Diameter |
= |
45mm |
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Outside Diameter |
= |
68mm |
|
Width |
= |
12mm |
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Contact Angle |
= |
15° |
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Precision Grade |
= |
P4S |
|
Seals or Shields |
= |
None |
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Material |
= |
Hybrid Ceramic |
|
Clearance |
= |
CN = Standard Internal clearance |
|
Cage Type |
= |
T = Outerring Guided Phenolic Cage |
Industrial Application Scenarios
This hybrid ceramic super-precision bearing is engineered for demanding applications requiring ultra-high speeds, minimal heat generation, exceptional rigidity, and zero vibration.
1. CNC Machine Tools & Metal Cutting Spindles
This is the most common application. The thin cross-section of the 719 series combined with the low thermal expansion of ceramic balls makes it perfect for:
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High-Speed Machining (HSM) Centers: Used for milling aluminum and titanium alloys in aerospace and automotive industries.
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CNC Engraving and Milling Spindles: Ideal for high-speed precision mold-making.
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Precision Grinding Spindles: High rotational accuracy (P4S) ensures sub-micron surface finish quality.
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PCB (Printed Circuit Board) Drilling Spindles: Micro-drilling requires extreme rotational speeds often exceeding 30,000 RPM.
2. Motor Spindles & High-Speed Electric Motors
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Integrated Motor Spindles: Where the motor rotor is built directly into the spindle shaft. Ceramic balls act as an electrical insulator to prevent electrical pitting (arc erosion) caused by stray motor currents
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High-Speed Servo Motors: For precision automation requiring rapid start-stop cycles and low rotational inertia.
3. Semiconductor & Optical Manufacturing
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Wafer Dicing and Grinding Machines: Requires absolute positioning accuracy and minimal thermal displacement to avoid damaging delicate silicon wafers.
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Laser Scanning Mirror Mechanisms: Demands ultra-smooth rotation with zero vibration to keep the optical path stable.
4. Vacuum & Aerospace Technology
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Turbomolecular Pumps: High-vacuum pumps used in semiconductor cleanrooms that spin at tens of thousands of RPM. Ceramic balls can run reliably in vacuum environments where traditional lubricants fail.
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Gyroscopes and Navigation Systems: Used in aviation and defense guidance systems for absolute stability and low frictional torque.
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