IPDB › China Industry › Industrial Equipment & Components › Bearing
Double Row Angular Contact Ball Bearings with High Speed and Stable Operation305263D 305263da 305428d 305272D1
Angular Contact Ball Bearing, Bearing, Angular Contact Ball Bearing
Zhejiang Judong Bearing Co., Ltd.
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Product Description Learn More About Our ProductsClick the name belowDeep groove ball bearingsCrossed Roller BearingsRod endDouble row deep groove ball bearingNeedle roller bearingsRadial spherical plain bearingsSelf-aligning ball bearingTapered roller bearingsStainless Steel BearingsAngular contact ball bearingsSpherical roller bearingsInsulating bearingThrust ball bearingsCylindrical roller bearingCeramic bearingPillow Block BearingCylindrical roller thrust bearingsHigh-temperature bearings Product Description Basic Structure & DesignComponents:Double-row steel balls: Two rows of balls arranged symmetrically at contact angles (typically 15°-40°).Inner & outer rings: Angular contact raceways optimized for load distribution.Integrated cage: Made of nylon or brass to synchronize double-row ball movement.Design Features:Bidirectional axial load capacity: Handles axial loads in both directions alongside radial loads.High rigidity: Symmetric layout minimizes deformation, ideal for precision positioning.Compact design: Dual-row integration saves installation space.Core AdvantagesSuperior load capacity:Axial load: 50%-80% higher than single-row bearings.Combined loads: Simultaneously handles radial and axial loads (e.g., gearboxes, spindles).High precision & rigidity:Reduces vibration and misalignment in precision equipment (e.g., CNC spindles, robotic joints).Simplified installation:Single-unit design eliminates pairing requirements (unlike single-row angular contact bearings).Extended service life:Optimized stress distribution minimizes localized wear. Key Selection ParametersContact angle:15°: Prioritizes high speed, low axial loads (e.g., small motors).25°-40°: Prioritizes heavy axial loads (e.g., industrial machinery).Dynamic/static load ratings:Calculate based on operational conditions (refer to ISO 281 standards).Speed limits:Slightly lower than single-row bearings (20%-30% reduction due to friction).Material & Sealing OptionsMaterials:Chrome steel (GCr15): General-purpose for standard industrial environments.Stainless steel (440C/316L): Corrosion-resistant for food/chemical industries.Ceramic hybrid: High-speed, anti-electrolysis (e.g., semiconductor equipment).Sealing types:Contact seals (2RS): Dust/waterproof, slightly reduces speed capability.Non-contact seals (ZZ): Low friction, ideal for high-speed applications.Installation Instructions Installation & Maintenance GuidelinesInstallation:Use thermal or hydraulic tools to avoid deformation.Ensure proper shaft/housing tolerances (recommended H7/k6 fit).Preload adjustment:Eliminate clearance via shims or threaded preload (follow manufacturer guidelines).Lubrication:High-speed: Synthetic oils (e.g., PAO).High-temperature/heavy loads: High-temperature grease (NLGI Grade 2). Product ParametersDesignationPrincipal dimensionsBasic load ratingsSpeed ratings dynamicstaticReference speedLimiting speed d[mm]D[mm]B[mm]C[kN]C0[kN][r/min][r/min] 305283 DA 150 230 70 203 285 2 800 3 000 305286 D 150 225 73 182 265 1 700 2 000 305183 160 240 76 234 335 2 600 2 800 305608 160 215 56 135 220 2 800 3 000 305608 B 160 215 56 135 220 2 800 3 000 305180 170 260 84 281 405 2 400 2 600 305262 D 180 259.5 66 225 310 2 400 2 600 305288 DA 180 250 70 190 285 2 400 2 600 305338 D 190 269.5 66 270 415 2 200 2 400 305263 D 200 289.5 76 302 475 1 800 2 200 305263 DA 200 289.5 76 302 475 1 800 2 200 305428 D 200 279.5 76 242 380 1 900 2 400 305272 D 220 309.5 76 312 520 2 000 2 000 305272 DA 220 309.5 76 312 520 2 000 2 000 305264 D 230 329.5 80 351 600 1 900 2 000 305270 D 260 369.5 92 397 710 1 700 1 700 305269 D 280 389.5 92 403 750 1 600 1 600CertificationsPackaging & Shipping Company ProfileFAQQ1: What about the MOQ? Can you accept a sample order?A: Our company MOQ is 1pc, and we can accept sample orders.Q2: Can you accept OEM/ODM?A: Yes, we can.Customizing according to your requirements or drawing.Q3: Do you supply door-to-door service?A: By air or express(DHL, FEDEX, EMS, etc.)Q4: Could you tell me the materials of your bearings?A: Chrome steel, carbon steel, stainless steel, ceramic, and plastic material.Q5: Are you a factory or trading company?A: We have our factory, JUDONG Bearing is specializes in manufacturing and exporting bearings.
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