B7015-E-2RSD-T-P4S-UL Angular Contact Bearing
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Brand |
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SEMRI |
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Manufacturer Part Number |
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B7015-E-2RSD-T-P4S-UL |
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Inside Diameter |
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75mm |
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Outside Diameter |
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115mm |
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Width |
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20m |
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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 |
B7015-E-2RSD-T-P4S-UL Super-Precision Spindle Bearing – Applications
This product is a super-precision, dual-sealed spindle angular contact ball bearing(ID: 75mm, OD: 115mm, Width: 20mm) .
Featuring a standard large steel ball design (B70 series), a 25° contact angle (E), dual-sided non-contact rubber seals (2RSD), and a laminated phenolic resin/textolite cage (T), its application scope differs significantly from high-speed, light-load ceramic ball bearings. Instead, it is specifically engineered for "medium-to-high speed, heavy load, high rigidity, and high environmental protection"requirements in core components of precision machinery. Its primary applications include:
1. Machine Tool Spindles (Particularly Medium-to-Heavy Cutting Spindles)
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CNC Lathe & Milling Machine Spindles: The large 25° contact angle (E) delivers exceptional axial load-carrying capacity and high rigidity. This makes it ideal for CNC lathes or conventional vertical machining center spindles that endure significant cutting forces during rough machining or the processing of steel and cast iron parts.
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Drilling & Milling Combination Power Heads: Implemented in heavy-duty power heads within automated manufacturing cells used for large-diameter drilling and milling operations.
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Surface & Cylindrical Grinder Spindles: Maintains a P4S graderunning accuracy (surpassing standard P4/ABEC7 tolerances) while tolerating continuous radial pressure from grinding wheels, ensuring nanometer-level flatness on finished workpiece surfaces.
2. High-Dust and Humid Harsh Working Environments
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Woodworking Machinery Spindles: Woodworking routers and milling machines operate in environments heavily saturated with sawdust and ambient wood particulates. The integrated 2RSD dual non-contact rubber sealsprevent fine wood dust from penetrating the internal raceways while sustaining a grease-lubricated limiting speed of up to 17,000 RPM.
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Stone & Glass Engraving Machine Spindles: These machining processes require heavy flood-cooling. The 2RSD seals offer foundational protection against splashing water and cutting fluids, effectively preventing the internal grease from being washed away or emulsified.
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PCB & Light Metal High-Speed Cutting Equipment: Acts as a barrier against fine metal chips or dust that could otherwise cause abrasive wear on the bearing raceways.
3. Precision Transmission & Positioning Mechanisms
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Heavy-Duty Precision Ball Screw Supports: Although specialized ball screw support series (e.g., 2344 or TAC) are preferred, a paired set of B7015 bearings is often deployed at the ends of feed axes in compact machine tools where space is constrained, providing both radial and axial locating support under medium loads.
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High-Precision Gearbox Output Shafts: Serves as the high-rigidity support end in high-precision planetary gearboxes or RV reducers utilized within robotic joints.
4. Other Automated Specialized Machines & Industrial Equipment
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High-Speed Textile Machinery: Implemented in rotating components requiring prolonged, stable operation with stringent protection demands against textile lint and airborne fibers.
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Industrial Centrifuges & Agitator Drive Shafts: Suited for medium-speed applications where extreme axial bearing rigidity and operational stability are paramount.
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