{"product_id":"browning-1045459-variable-pitch-sheave-1-groove","title":"Browning 1045459 Variable Pitch Sheave 1-groove","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe BROWNING 1045459 is a single-groove variable pitch sheave designed for adjustable-speed V-belt drive systems in HVAC, industrial, and mechanical equipment applications. It features a 1.125-inch inside bore diameter and a 4.75-inch outside diameter, with a sheave thickness of 2.156 inches. The variable pitch design allows the effective pitch diameter to be adjusted by opening or closing the sheave halves, giving technicians precise control over blower or fan speed without swapping pulleys. At 3.5 pounds, it is a solid, durable component suited for commercial and light industrial belt drive installations.\u003c\/p\u003e\u003cp\u003eThis sheave is used in V-belt drive systems where fan or blower speed must be tuned during commissioning or adjusted in the field. Typical applications include air handling units, furnace blowers, exhaust fans, and other belt-driven HVAC equipment. It accepts 3L, 4L, A, 5L, and B belt sections, covering a wide range of standard V-belt sizes. The adjustable face width of 0.656 inches to 1.031 inches accommodates belt tracking across the pitch diameter range. Installers working on rooftop units, air handlers, or inline fans will find this sheave compatible with common adjustable-speed drive setups.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eVariable pitch design allows field adjustment of drive speed without replacing the sheave\u003c\/li\u003e\n\u003cli\u003eAccepts multiple belt sections: 3L, 4L, A, 5L, and B\u003c\/li\u003e\n\u003cli\u003e1.125-inch bore diameter fits standard shaft sizes used in HVAC blower assemblies\u003c\/li\u003e\n\u003cli\u003eSingle-groove configuration for straightforward single-belt drive setups\u003c\/li\u003e\n\u003cli\u003eAdjustable face width from 0.656 inches to 1.031 inches\u003c\/li\u003e\n\u003cli\u003ePitch diameter range supports multiple belt types: up to 4.1 inches for 3L, 4.4 inches for 4L or A, and 4.7 inches for 5L or B belts\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eCompatible with 3L, 4L, A, 5L, and B section V-belts. Designed as a variable pitch replacement sheave for single-groove belt drive systems in residential and commercial HVAC blower and fan applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is typically performed by a licensed HVAC technician or millwright. Always de-energize and lock out the equipment before removing or installing sheaves. A shaft key and setscrew are typically used to secure the sheave to the shaft — confirm bore fitment before installation. After adjustment, verify belt tension and alignment with a straightedge before returning the unit to service.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInside Bore Diameter\u003c\/strong\u003e: 1.125 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 4.75 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Grooves\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Belt Sections\u003c\/strong\u003e: 3L, 4L, A, 5L, B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheave Thickness\u003c\/strong\u003e: 2.156 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFace Width Range\u003c\/strong\u003e: 0.656 inches to 1.031 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMin Pitch Diameter (3L Belt)\u003c\/strong\u003e: 3.3 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Pitch Diameter (3L Belt)\u003c\/strong\u003e: 4.1 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMin Pitch Diameter (4L or A Belt)\u003c\/strong\u003e: 3.4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Pitch Diameter (4L or A Belt)\u003c\/strong\u003e: 4.4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMin Pitch Diameter (5L or B Belt)\u003c\/strong\u003e: 3.7 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Pitch Diameter (5L or B Belt)\u003c\/strong\u003e: 4.7 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 3.5 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: BROWNING\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 1045459\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BROWNING","offers":[{"title":"Default Title","offer_id":51540239319346,"sku":"1045459","price":120.48,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/bfc6a58b359180ffe05d55e39965dcc5.jpg?v=1785849877","url":"https:\/\/voomisupply.com\/products\/browning-1045459-variable-pitch-sheave-1-groove","provider":"Voomi Supply","version":"1.0","type":"link"}