Customization: | Available |
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Certification: | ISO |
Pulley Sizes: | Bk |
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I. Core definitions of AK and BK pulleys
1. AK pulleys-Structural features:
Shaft bore is conical (Conical Bore) Conical Bore: The internal bore of the pulley body is conical in design (usually used in conjunction with a conical sleeve) and needs to be connected to the shaft through the conical sleeve.
Installation method: rely on the taper sleeve to hold the shaft (similar to the 'tightening sleeve' principle), without machining the keyway, through the bolt to tighten the taper sleeve to achieve the fixation.
Applicable scenarios: equipment requiring quick installation, adaptation to various shaft diameters or frequent maintenance (e.g. mining machinery, fans).
Typical identification:
Example of model: AK 50 (indicates AK type pulley with a reference diameter of 50mm).
2. BK pulley-Structural features:
Cylindrical Bore: The internal bore of the wheel body is straight (smooth cylindrical bore). The shaft is connected to the pulley by means of a keyway and a key.
Mounting: key transmission of torque (similar to conventional pulleys), keyway in the shaft bore (e.g. DIN 6885 keyway).
Scenarios: Stationary equipment (e.g. motors, gearboxes) with a machined keyway in the shaft, or where high torque transmission is required.
Typical designation:
Example of model: BK 80 (indicates a BK type pulley with a reference diameter of 80 mm).
Comparison items | AK belt pulley | BK belt pulley |
Shaft hole shape | Conical (requires conical sleeve) | Cylindrical (requires keyway) |
Installation method | The conical sleeve clamps the shaft and does not require key slots | Key connection, dependent on the keyway on the shaft |
Axial diameter compatibility | It can be adapted to different shaft diameters by replacing the conical sleeve | A custom belt pulley is required for the fixed shaft diameter |
Maintenance convenience | Quick disassembly and assembly, suitable for frequent maintenance | Assembly and disassembly require moving the shaft or removing adjacent components |
Torque transmission | Depends on the friction force of the conical sleeve (requires correct tightening of bolts) | Mechanical meshing dependent on the key (torque transmission is more direct) |
Typical applications | Used in mining machinery, fans, conveyor belts (needs to be flexibly adapted) | Motor, reducer, fixed equipment (high torque scenarios) |
Typical applications of AK pulleys | Typical applications of BK pulleys |
Mining crushers | Electric motors and reducers |
Fans / conveyor belts | High-torque equipment |
European standard cone sleeve system | American standard / general equipment |
Type of transmission belt | V-belt pulley | |
Flat belt pulley | ||
Synchronous belt pulley | ||
Multi-ribbed belt pulley | ||
Structural style | Solid pulley | |
Flange pulley | ||
O-ring pulley | ||
Elliptical spoke pulley | ||
Way to install | Fixed pulley | |
Mobile pulley | ||
Application scenarios | Industrial equipment, automobiles, agricultural machinery, household appliances. |
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