Angular Contact Ball Bearings 71715404816
I. Bearing Type
Four-point contact ball bearing (single-row angular contact ball bearing), 35กใ contact angle; capable of supporting bidirectional axial loads and radial loads; solid brass cage.
II. Standard Dimensions
Inner diameter d = 140 mm
Outer diameter D = 250 mm
Width B = 42 mm
Minimum chamfer r = 3 mm
III. Key Structural Features
1. Split inner ring design with four-point contact between balls and raceways; a single bearing can support heavy axial thrust in both directions.
2. Requires less axial space compared to paired Angular Contact Ball Bearings (7-series) or double-row angular contact ball bearings.
3. High-strength solid brass cage (M-type), suitable for medium-to-high speeds and shock-load conditions.
4. Open design (unsealed); requires an external lubrication supply.
IV. Typical Applications
1. High-speed shafts in speed reducers and gearboxes (helical gears generate bidirectional axial forces)
2. Main shafts of air compressors, screw pumps, and compressors
3. Wind turbine gearboxes and mining/metallurgical equipment
4. Vehicle transmissions and heavy-duty construction machinery drive systems
5. Machine tool spindles and rotary tables
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