B7201-E-2RSD-T-P4S-UL Precision Bearing
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Brand |
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SEMRI |
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Manufacturer Part Number |
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B7201-E-2RSD-T-P4S-UL |
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Inside Diameter |
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12mm |
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Outside Diameter |
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32mm |
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Width |
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10m |
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Contact Angle |
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25° |
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Precision Grade |
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P4S |
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Seals or Shields |
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Laminated fabric cage |
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Clearance |
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CN = Standard Internal clearance |
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Cage Type |
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T = Outerring Guided Phenolic Cage
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Target Applications
1. Miniature CNC Machine Tools & High-Speed Spindles
In the field of micro and miniature precision machining, small-diameter cutting tools rely heavily on ultra-high rotational speeds to achieve the required cutting surface speed:
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Precision Mold Engraving Spindles: Engineered for rapid, high-surface-finish milling of graphite electrodes, cemented carbide micro-molds, smartphone middle frames, and electronic cigarette enclosures.
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Jewelry & Watchmaking Equipment: Used for micron-level engraving and cutting of precious metals (gold, silver, platinum) and miniature watch gears/shafts. The 25° contact angle (E) ensures exceptional radial stiffness.
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Dental Milling Spindles (Digital Dentistry): Specifically designed for micro-CNC cutting spindles processing zirconia, resins, and titanium alloy prosthetics, capable of withstanding harsh environments filled with airborne dust.
2. Semiconductor & Electronics Manufacturing Equipment
The electronics industry demands rapid response times, ultra-compact envelopes, and strict "contamination-proof" and "maintenance-free" characteristics:
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High-Speed PCB (Printed Circuit Board) Drilling & Routing Machinery: Supports micro-drill bits with diameters ranging from 0.1 to 0.3 mm, running continuously at tens of thousands of RPMs while preventing epoxy resin dust and fiberglass debris from ingress into the bearing raceways.
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High-Speed Rotating Nozzles for Semiconductor Pick-and-Place Machines: Provides extremely low rotational inertia and high responsiveness when the nozzle captures and rotates electronic components for alignment, satisfying the demands of high-frequency, instantaneous start-stop cycles.
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Hard Disk Drive (HDD) & High-Speed Optical Drive Testing Spindles: Serves as the core high-speed rotating component in precision metrology and inspection equipment.
3. Medical Devices & High-Speed Laboratory Analytical Instruments
The medical sector imposes near-stringent technical benchmarks on bearings regarding low noise, minimal thermal generation, and lifetime maintenance-free operation:
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High-Speed Medical Centrifuge Spindles: Supports the rotors of high-speed micro-centrifuges used in laboratories and hospitals for blood separation, cell purification, and DNA extraction.
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Surgical Micro-Powered Handpieces (Pneumatic/Electric Bone Drills): Utilized in micro-powered tools by surgeons during delicate orthopedic or neurosurgical operations. The integrated seals prevent ingress of disinfectants, bodily fluids, or human tissues.
4. Precision Measuring Instruments & Optical Scanning Assemblies
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Laser Scanning Mirrors & Optical Indexing Heads: Supports high-speed rotating laser reflectors and spectrometers, demanding absolute operational trajectory stability with rotational runout controlled strictly within the micron (μm) level.
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Coordinate Measuring Machine (CMM) Precision Probes: Serves as the articulation joint support within multi-axis indexing probe heads.
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