{"product_id":"browning-1045988-variable-pitched-sheave-2-groove","title":"Browning 1045988 Variable Pitched Sheave 2 Groove","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe BROWNING 1045988 is a two-groove variable pitched sheave designed for adjustable belt drive systems in HVAC, industrial, and mechanical equipment applications. With a 1 inch inside bore diameter and a 5.35 inch outside diameter, this sheave allows field adjustment of drive speed ratios without replacing the entire drive assembly. The sheave thickness is 3 inches and the face width ranges from 1-3\/8 to 2 inches. It accepts 3L, 4L, A, 5L, and B section V-belts, making it compatible with a wide range of standard belt configurations. Licensed HVAC technicians and mechanical contractors rely on variable pitch sheaves to fine-tune blower speeds during system balancing and commissioning.\u003c\/p\u003e\u003cp\u003eThis sheave is suited for residential and light commercial HVAC air handling units, blower assemblies, and fan drive applications where airflow adjustment is required after installation. Variable pitch sheaves are commonly installed on supply fan drives in air handlers, rooftop units, and duct furnace blower sections. The adjustable pitch diameter range allows the installer to dial in the correct CFM output without cutting new belts or sourcing fixed-bore sheaves. This part ships as a single unit and is intended for installation by qualified mechanical or HVAC technicians familiar with belt drive systems.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eTwo-groove configuration accepts 3L, 4L, A, 5L, and B section V-belts\u003c\/li\u003e\n\u003cli\u003e1 inch inside bore diameter for compatibility with standard shaft sizes\u003c\/li\u003e\n\u003cli\u003e5.35 inch outside diameter with 3 inch sheave thickness\u003c\/li\u003e\n\u003cli\u003eFace width adjustable from 1-3\/8 to 2 inches for variable pitch operation\u003c\/li\u003e\n\u003cli\u003ePitch diameter range: 3.9 to 4.7 inches for 3L belts, 4.0 to 5.0 inches for 4L or A belts, 4.3 to 5.3 inches for 5L or B belts\u003c\/li\u003e\n\u003cli\u003eAllows on-site drive ratio adjustment without full drive replacement\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or upgrade sheave for belt drive systems using 3L, 4L, A, 5L, or B section V-belts with a 1 inch bore shaft.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified HVAC technician or mechanical contractor. De-energize and lock out the equipment before servicing any belt drive components. Ensure the sheave is properly aligned with the mating sheave using a straightedge or laser alignment tool before tensioning the belt. Refer to the belt manufacturer tensioning guidelines and applicable IFGC or mechanical code requirements for the installation jurisdiction.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInside Bore Diameter\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 5.35 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Grooves\u003c\/strong\u003e: 2\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: 3 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFace Width Range\u003c\/strong\u003e: 1-3\/8 to 2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMin Pitch Diameter (3L Belt)\u003c\/strong\u003e: 3.9 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Pitch Diameter (3L Belt)\u003c\/strong\u003e: 4.7 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMin Pitch Diameter (4L or A Belt)\u003c\/strong\u003e: 4.0 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Pitch Diameter (4L or A Belt)\u003c\/strong\u003e: 5.0 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMin Pitch Diameter (5L or B Belt)\u003c\/strong\u003e: 4.3 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Pitch Diameter (5L or B Belt)\u003c\/strong\u003e: 5.3 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 7.18 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: 1045988\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BROWNING","offers":[{"title":"Default Title","offer_id":51544020418866,"sku":"1045988","price":339.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d9c8a1975b867e1b778b00f560e80ecb_1ddbf390-7573-4969-afd8-735428523d6d.jpg?v=1785923062","url":"https:\/\/voomisupply.com\/products\/browning-1045988-variable-pitched-sheave-2-groove","provider":"Voomi Supply","version":"1.0","type":"link"}