Lennox 31K69 - (1VP34X7/8) Variable Pitch Cast Iron Finished Bore Pulley, 3.15 Inch OD, 1-Groove, 7/8 Inch Bore
The Lennox 31K69 (1VP34X7/8) is a precision-engineered variable pitch pulley designed for HVAC and industrial belt drive applications. Crafted from premium-grade cast iron, this pulley is built to withstand demanding operating conditions, offering excellent resistance to wear, vibration, and temperature fluctuations.
With a 3.15-inch outside diameter, single groove, and a 7/8-inch finished bore, this pulley is ideal for applications requiring a compact and efficient belt transmission system. The variable pitch feature allows for manual adjustment of the effective diameter, enabling fine-tuning of drive speed and torque without the need to change pulleys or belts. This flexibility can help optimize airflow, reduce energy consumption, and extend the life of connected equipment.
The 1VP series is compatible with A-section and 4L belts, making it versatile for use across a wide range of motors, blowers, and fans. The finished bore includes a keyway and setscrew for secure mounting on the shaft, ensuring stable and reliable operation over time.
Product Features:
- Outside Diameter (OD): 3.15 inches
- Bore Size: 7/8 inch (finished bore with keyway and setscrew)
- Groove Type: 1-groove, compatible with A-section and 4L belts
- Pitch Adjustment: Variable pitch for customizable drive settings
- Material: Solid cast iron – corrosion-resistant, vibration-dampening
- Application: HVAC systems, blowers, fan drives, and motorized equipment
- Pulley Series: 1VP – optimized for efficiency and adjustability
Benefits:
- Facilitates easy speed adjustment without replacing components
- Enhances system performance and energy efficiency
- Reduces mechanical stress on belts and motors
- Long service life with minimal maintenance requirements
Whether you're servicing a Lennox air handler or designing a custom motor drive setup, the Lennox 31K69 pulley provides reliable performance and operational flexibility. Its rugged construction and adjustable design make it a go-to component for professionals who demand precision and durability.
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