{"product_id":"browning-1045939-variable-pitched-sheave-2-groove","title":"Browning 1045939 Variable Pitched Sheave 2 Groove","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe BROWNING 1045939 is a two-groove variable pitched sheave designed for use in belt-driven power transmission systems. With a 1 inch bore (inside diameter) and a 4.75 inch outside diameter, this sheave accepts 3L, 4L, A, 5L, and B section V-belts. The 3 inch sheave thickness and a face width range of 1.375 to 2 inches accommodate the variable pitch adjustment that makes this component useful for fine-tuning drive speed ratios in the field. Weighing 5.68 pounds, it is built for durable service in HVAC, industrial fan, and blower drive applications. Installation is typically performed by HVAC technicians or mechanical contractors.\u003c\/p\u003e\n\u003cp\u003eThis variable pitched sheave is suited for residential and light commercial applications where belt drive speed adjustment is required without swapping components. Typical installations include air handling unit blower assemblies, exhaust fans, and other rotating equipment driven by V-belts. The multi-section belt compatibility gives technicians flexibility when selecting or replacing drive belts on existing equipment. It is a standard adjustable-pitch component used when motor or blower RPM needs to be tuned to system requirements.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eTwo-groove design allows dual-belt drive configurations for increased power transmission capacity\u003c\/li\u003e\n  \u003cli\u003eVariable pitch adjustment supports fine-tuning of drive speed ratios without replacing the sheave\u003c\/li\u003e\n  \u003cli\u003eCompatible with 3L, 4L, A, 5L, and B section V-belts for broad belt selection flexibility\u003c\/li\u003e\n  \u003cli\u003e1 inch bore fits common motor and blower shaft sizes in HVAC and industrial fan drives\u003c\/li\u003e\n  \u003cli\u003eFace width range of 1.375 to 2 inches accommodates pitch adjustment across supported belt sections\u003c\/li\u003e\n  \u003cli\u003e3 inch sheave thickness provides structural depth appropriate for dual-groove loading\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or upgrade variable pitched sheave for belt-driven blower and fan assemblies using 3L, 4L, A, 5L, or B section V-belts with a 1 inch shaft bore.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by qualified HVAC technicians or mechanical contractors. Disconnect and lock out all electrical power to the drive system before removing or installing any sheave. Use a properly sized bore gauge and shaft key to ensure secure mounting on the motor or blower shaft, and verify belt tension and alignment after adjustment. Consult applicable mechanical codes and the equipment manufacturer specifications for drive ratio and belt tension requirements.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInside Diameter (Bore)\u003c\/strong\u003e: 1 inch\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: 2\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: 1.375 to 2 inches\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\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\u003eMax Open Turns - 4L or A Belts\u003c\/strong\u003e: 5 turns\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax Open Turns - 5L or B Belts\u003c\/strong\u003e: 6 turns\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMin Open Turns - 5L or B Belts\u003c\/strong\u003e: 1 turn\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 5.68 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\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: 1045939\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BROWNING","offers":[{"title":"Default Title","offer_id":51540210417970,"sku":"1045939","price":684.28,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d9c8a1975b867e1b778b00f560e80ecb_4a2996d3-b15b-4dce-a99a-eaf3fb3a42c5.jpg?v=1785848929","url":"https:\/\/voomisupply.com\/products\/browning-1045939-variable-pitched-sheave-2-groove","provider":"Voomi Supply","version":"1.0","type":"link"}