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
