The TB Wood's 2VP4278 2-Groove Variable Pitch Pulley is engineered to provide precise speed adjustments in belt-driven systems, enhancing operational efficiency and adaptability. Designed for use with 3L, O, 4L, A, 5L, B, and 5V belt sections, this pulley offers versatility across various applications. Its 0.8750-inch bore with a finished keyway ensures secure shaft attachment, while the 3.9500-inch outside diameter accommodates a range of belt sizes. Constructed from high-quality cast iron, the 2VP4278 is built for durability and long-term performance. The pulley features a 3-inch length through bore, providing stability and support during operation. With a weight of 4.40 lbs, it offers a balance between strength and manageability. The 2VP4278 is compatible with Sure-Grip‚ Quick Detachable (QD) bushings, facilitating easy installation and maintenance. This compatibility allows for quick adjustments and replacements, minimizing downtime and maintenance costs. The variable pitch design enables precise speed control, making it ideal for applications requiring variable speed operation. By incorporating the TB Wood's 2VP4278 into your drive system, you can achieve optimal performance and reliability, addressing the need for adaptable and efficient power transmission solutions.