The Browning 1VP34X7/8 CLEAR PK is a professional-grade variable pitch sheave engineered for precise air balancing and belt-drive speed adjustments in HVACR systems. This single groove sheave features a high-density cast iron construction, providing the mass and durability required for continuous-duty fans, blowers, and pumps. With a 3.15″ outside diameter and a 7/8″ finished bore, this component integrates seamlessly onto standard motor shafts, including a pre-machined keyway and hollow-head setscrews for a secure, slip-free fit.
Designed for maximum versatility in the field, the Browning 1VP34 is compatible with 3L, 4L, A, AX, 5L, B, and BX V-belts. Its adjustable flange allows for a pitch diameter range of 1.7 to 3.3, enabling technicians to fine-tune airflow or head pressure without the need for multiple fixed-diameter pulleys. The CLEAR PK designation ensures the unit is delivered in protective packaging, maintaining the integrity of the precision-threaded barrel and angular-faced discs for smooth, binding-free adjustment during commissioning and system optimization.
Key Benefits:
Precision Speed Control: The adjustable male and female threaded sections allow for incremental pitch changes to reach exact RPM targets.
Heavy-Duty Cast Iron: Provides superior vibration dampening and wear resistance compared to standard aluminum alternatives.
Universal Compatibility: One sheave handles multiple belt sections, including A-section and B-section belts, reducing truck stock requirements.
Contractor-Ready Installation: Finished bore with 3/16″ x 3/32″ keyway simplifies retrofits and new installs on fractional horsepower motors.
Common Questions:
How do I adjust the pitch diameter? Loosen the locking setscrew on the movable flange and rotate the disc; moving the discs closer increases the pitch diameter and driven speed.
What is the maximum horsepower rating? Standard 1VP series sheaves are typically rated for service in drives up to 25 HP, depending on the specific belt and application.
Can this be used as a companion sheave? This is a driver sheave; for the driven side, use a standard fixed-pitch Browning sheave for optimal alignment and belt life.
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.
