7034ACM/DB P6 Angular Contact Ball Bearing Model Definition 7034: 70 series angular contact ball bearing, dimensions d170×D260×B42 AC: Contact angle 25° M: Solid brass cage (ACM = machined brass cage) DB: Two sets of bearings paired back-to-back (<> installation, capable of bidirectional axial load, large overturning moment) P6: Accuracy class P6 (ABEC3) Load Parameters (Single Set 7034ACM) Basic Rated Dynamic Load Cr: 199 kN Basic Rated Static Load Cor: 227 kN DB Paired Total Dynamic Load ≈ 398 kN, Total Static Load ≈ 454 kN Limiting Speed (No Preload, Standard Lubrication) Grease Lubrication: 2000 r/min Oil Lubrication: 2600 r/min After DB pairing and assembly, the actual allowable speed needs to be reduced by 10%~20% Weight: Single Set 7034ACM: 8.27 kg DB Pair Set: ≈16.54 kg Installation Boundary Dimensions Minimum Shoulder Diameter da: 182 mm Maximum Housing Shoulder Diameter Da: 248 mm Maximum Permissible Shaft/Housing Fillet ra: 2.0 mm Structural Characteristics Solid brass cage, suitable for medium-heavy load and medium-high speed applications DB Back-to-Back Pairing: Large support span, strong anti-overturning moment, bidirectional axial force resistance P6 Precision Grade, general precision for machine tools, reducers, and gearboxes Open type, no seal, requires external lubrication and dustproof structure Series Differentiation 7034C: 15° contact angle, emphasizing high-speed radial loads 7034AC (ACM): 25° balanced radial + axial
7034B: 40° large contact angle, heavy-duty axial applications
