{"product_id":"browning-1045301-variable-pitched-sheave-1-groove","title":"Browning 1045301 Variable Pitched Sheave 1 Groove","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe BROWNING 1045301 is a single-groove variable pitched sheave designed for use in belt-drive systems across HVAC, industrial, and mechanical equipment applications. Cast from iron, it accepts a 0.5-inch bore and measures 3.75 inches in outside diameter with a sheave thickness of 1.875 inches. The variable pitch design allows the effective pitch diameter to be adjusted by opening or closing the sheave faces, making it a reliable solution for fine-tuning motor speed and belt tension without swapping out components. This sheave weighs 1.45 pounds and is installed by HVAC technicians and mechanical contractors working on fan and blower assemblies.\u003c\/p\u003e\u003cp\u003eThis sheave is suited for residential and light commercial HVAC systems, exhaust fans, blowers, and general belt-drive equipment where speed adjustment is required. It accommodates 3L, 4L, 5L, A, and B belt sections, giving installers flexibility across a wide range of drive configurations. The face width adjusts between approximately 0.656 inches and 1.031 inches depending on the open-turn setting selected for the target belt section. It is a common replacement or upgrade component on air-handling units and belt-driven fan assemblies.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eVariable pitch design allows on-site pitch diameter adjustment without replacing the sheave\u003c\/li\u003e\n\u003cli\u003eAccepts 3L, 4L, 5L, A, and B belt sections for broad drive compatibility\u003c\/li\u003e\n\u003cli\u003eCast iron construction for durability in continuous belt-drive service\u003c\/li\u003e\n\u003cli\u003e0.5-inch bore fits standard motor and jackshaft configurations\u003c\/li\u003e\n\u003cli\u003eFace width range of approximately 0.656 to 1.031 inches accommodates variable groove settings\u003c\/li\u003e\n\u003cli\u003eSingle-groove design suited for single-belt drive arrangements\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or new-installation variable pitched sheave for single-belt drive systems using 3L, 4L, 5L, A, or B section belts.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified HVAC technician or mechanical contractor. Disconnect and lock out all power to the unit before removing or installing any belt-drive components. Ensure the sheave is properly aligned with the mating pulley before tensioning the belt, and verify the selected open-turn setting matches the pitch diameter required for the target belt section. Consult applicable mechanical codes and the equipment manufacturer's service documentation for drive alignment and belt tension guidelines.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBore Diameter\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 3.75 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Grooves\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheave Thickness\u003c\/strong\u003e: 1.875 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFace Width Range\u003c\/strong\u003e: 0.656 to 1.031 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Belt Sections\u003c\/strong\u003e: 3L, 4L, 5L, A, B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Pitch Diameter (3L)\u003c\/strong\u003e: 2.3 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Pitch Diameter (3L)\u003c\/strong\u003e: 3.1 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Pitch Diameter (4L or A)\u003c\/strong\u003e: 2.4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Pitch Diameter (4L or A)\u003c\/strong\u003e: 3.4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Pitch Diameter (5L or B)\u003c\/strong\u003e: 2.7 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Pitch Diameter (5L or B)\u003c\/strong\u003e: 3.7 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Cast Iron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1.45 pounds\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: 1045301\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BROWNING","offers":[{"title":"Default Title","offer_id":51542976397618,"sku":"1045301","price":77.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f97629de556c16cbcec45fdf415b07eb.jpg?v=1785912880","url":"https:\/\/voomisupply.com\/products\/browning-1045301-variable-pitched-sheave-1-groove","provider":"Voomi Supply","version":"1.0","type":"link"}