Browning 1VP34X3/4 Variable Pitch Sheave 1 Groove 3/4" Bore Cast Iron FHP VP Series

The Browning 1VP34X3/4 is a single-groove, finished bore, cast iron variable pitch sheave from Browning's VP Series FHP (Fractional Horsepower) line. Designed for flexible speed adjustment in light-duty power transmission applications, this sheave features a 3/4-inch finished bore with keyway and a 3.15-inch outside diameter, making it a compact solution for fans, pumps, conveyors, mixers, and ventilators.

How It Works:

VP sheaves consist of a male section with a threaded barrel and a female section with a threaded bore. By rotating the two halves relative to each other, the effective pitch diameter changes — when the discs move toward each other, the belt rides higher in the groove, increasing the pitch diameter and driven speed. The male section features flat surfaces at 180-degree increments for positive setscrew locking, ensuring secure adjustment retention.

Key Specifications:

• Series: VP (Variable Pitch), FHP
• Number of Grooves: 1
• Bore Diameter: 3/4 in (0.750 in), Finished with Keyway
• Keyway Size: 3/16 x 3/32 in
• Outside Diameter: 3.15 in
• Face Width: 21/32 to 1 in
• Length Through Bore: 1.875 in
• Compatible Belt Sections: 3L, 4L (A), 5L (B)
• Pitch Diameter Range (3L Belt): 1.70 in (min) – 2.50 in (max)
• Pitch Diameter Range (A/4L Belt): 2.00 in (min) – 3.00 in (max)
• Pitch Diameter Range (B/5L Belt): 2.40 in (min) – 2.90 in (max)
• Datum Diameter: 2.90 in (A, max), 3.20 in (B, max)
• Approximate Adjustment Range: 1.3:1
• Material: Cast Iron
• Fastener: Hollow head setscrews
• Weight: 1.22 lbs
• Manufacturer Part Number: 1VP34X3/4
• Regal Rexnord Catalog Number: 1045285

Any standard single-groove O, A, B, or 5V Browning sheave is compatible as a companion sheave. This sheave is statically balanced for smooth operation across its adjustment range.