B7020-E-2RSD-T-P4S-UL Angular Contact Bearing
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Brand |
= |
SEMRI |
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Manufacturer Part Number |
= |
B7020-E-2RSD-T-P4S-UL |
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Inside Diameter |
= |
100mm |
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Outside Diameter |
= |
150mm |
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Width |
= |
24m |
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Contact Angle |
= |
25° |
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Precision Grade |
= |
P4S |
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Seals or Shields |
= |
Laminated fabric cage |
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Clearance |
= |
CN = Standard Internal clearance |
|
Cage Type |
= |
T = Outerring Guided Phenolic Cage |
Nomenclature & Suffix Breakdown
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B7020: Standard series and size. 70-series super-precision angular contact ball bearing with standard steel balls for high load capacity; "20" is the bore code (20 × 5 = 100 mm).
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E: Contact angle. Features a 25° contact angle, optimized for high radial stiffness and extremely high speeds.
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2RSD: Sealing design. Equipped with non-contact lip seals on both sides, preventing dust and cutting fluids from entering without increasing frictional torque.
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T: Cage material. Fabricated from laminated fabric (phenolic resin) guided by the outer ring, minimizing weight and friction for high-speed rotation.
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P4S:ISO P4 limits to deliver superior running accuracy and minimal vibration.
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UL: Preload & Arrangement. Universally matchable design for mounting in pairs or sets. When configured in any standard arrangement (DB, DF, or DT), it provides a Light Preload.
Target Applications
1. Machine Tool Spindles
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CNC Milling & Machining Centers: Ensures low radial runout and premium surface finishes on machined workpieces.
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High-Speed Grinding Machines: Delivers the strict rotational accuracy required for internal and external grinding spindles.
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Precision Engraving Machines: The 25° contact angle and light preload minimize heat generation, preventing spindle thermal expansion.
2. Harsh & Maintenance-Free Environments
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Contaminated Areas: The 2RSD seals block metallic debris, chips, and aggressive coolants from causing race pitting.
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Sealed-for-Life Systems: Eliminates the need for manual regreasing, reducing machine downtime and operational costs.
3. Specialty Industrial Machinery
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Woodworking Spindles: The robust seals and phenolic cage resist fine wood dust penetration to prevent catastrophic bearing failure.
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Glass & Ceramic Processing: Protects inner components against highly abrasive glass and ceramic particulates.
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