Browning 1VL25X1/2 CLEAR PK Sheave

The Browning 1VL25X1/2 CLEAR PK Sheave is a professional-grade variable pitch V-belt sheave designed for precise HVAC blower speed adjustment and air handler performance tuning. Constructed from high-tensile cast iron, this single-groove component features a 1/2 inch fixed bore and is specifically engineered for use with 3L fractional horsepower belts. With an outside diameter of 2.50 inches, this VL Series sheave provides a critical variable pitch range of 1.6 to 2.4 inches, allowing contractors to fine-tune RPMs and system static pressure without replacing the entire drive assembly. The finished bore includes a standard keyway and 5/16-18 knurled setscrews to ensure a secure, slip-free attachment to the motor shaft. This HVAC replacement part is an essential stock item for technicians maintaining light-duty residential and commercial ventilation systems where adjustable pitch diameter is required for optimal airflow balancing.

• Precision Airflow Control: Allows for incremental drive ratio adjustments to meet specific CFM requirements.
• Durable Cast Iron Housing: Provides superior vibration dampening and thermal stability compared to lighter alloy alternatives.
• Simplified Installation: The 1/2" finished bore eliminates the need for separate bushings, reducing tool overhead on the job site.
• Versatile Compatibility: Optimally machined for 3L belt sections, ensuring a proper seat and reduced belt wear.

• How do I adjust the pitch on a Browning 1VL25X1/2? Loosen the setscrew on the adjustable flange and rotate the flange to increase or decrease the pitch diameter. Ensure you re-tighten the setscrew onto the flat surface of the threaded barrel.
• What is the maximum RPM for this cast iron sheave? Standard VL sheaves are balanced for high-speed operation, but always verify your motor's nameplate RPM against the FHP variable pitch sheave limits.
• Can I use this with a 4L or A-section belt? No, this specific model is optimized for a 3L belt section; using larger belts will result in improper seating and premature drive failure.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.