Description
Product Overview
The CMFG BK28-3/4 is a precision‑engineered V‑belt pulley designed for demanding industrial applications. With an outside diameter of 2.95 inches and a 1‑groove profile, it accommodates standard 4L, A, 5L and B V‑belts. Constructed from high‑grade cast iron, the pulley offers exceptional static balance and resistance to wear, ensuring consistent power transmission. The fixed bore measures 3/4 inch, providing a secure fit on shafts commonly found in compressors, motors and material handling equipment. CMFG’s reputation for quality manufacturing is reflected in the tight tolerances and robust finish of each unit.
Usage
This pulley is ideal for a wide range of industrial settings, including manufacturing plants, HVAC systems, and material handling machinery. It excels in applications where reliable torque transfer and long‑term durability are critical, such as driving compressors, conveyor motors, and pump shafts. The standard V‑belt groove makes it compatible with existing belt inventories, reducing downtime during maintenance or equipment upgrades. 
Why Choose Us
CMFG combines decades of engineering expertise with rigorous quality control to deliver pulleys that meet or exceed industry standards. Each pulley undergoes static balance testing to eliminate vibration, extending the life of both the belt and the driven equipment. Our cast iron material provides superior strength while resisting corrosion, making it suitable for harsh environments. Additionally, we offer a hassle‑free return service within one month, ensuring customer confidence and satisfaction.
Key Features
- Durable cast iron construction for high strength and wear resistance
- Precise 2.95 inch OD and 3/4 inch fixed bore for secure shaft fit
- Standard 1‑groove V‑belt profile compatible with 4L, A, 5L and B belts
- Static‑balanced design minimizes vibration and extends equipment life
- Ideal for compressors, motors, conveyors and other power transmission devices
FAQ
What belt types are compatible with this pulley?
The pulley is designed for standard V‑belts such as 4L, A, 5L and B profiles, providing flexibility for various industrial applications.
Can this pulley be used on a rotating shaft with a different bore size?
No, the pulley features a fixed 3/4 inch bore and should be matched to a shaft of the same diameter for optimal performance.
Is the cast iron material suitable for corrosive environments?
Yes, the high‑grade cast iron used in this pulley offers good resistance to corrosion, making it suitable for many harsh industrial settings.
What is the return policy if the pulley does not meet my expectations?
CMFG provides a smooth and worry‑free return service within one month of purchase, ensuring customer satisfaction.
How does static balance improve pulley performance?
Static balance reduces vibration during operation, which helps extend the life of both the pulley and the attached belt, and improves overall system efficiency.





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