{"product_id":"browning-1028307-single-groove-sheave-1-1-8-in-bore","title":"Browning 1028307 Single Groove Sheave 1-1\/8 in Bore","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe BROWNING 1028307 is a finished bore single groove sheave designed for V-belt drive systems in commercial and industrial mechanical applications. The sheave features a 1-1\/8 inch bore diameter and a 4-1\/4 inch outer diameter, with a belt groove pitch diameter of 3.5 inches for 4L or A-type belts. Constructed from cast iron, this sheave delivers the rigidity and wear resistance required for sustained belt drive operation. The overall length through the bore measures 1-5\/32 inches, and the groove face width is 7\/8 inch. Installation is handled by millwrights, HVAC mechanics, or maintenance technicians working on fan and blower assemblies.\u003c\/p\u003e\n\u003cp\u003eThis sheave is suited for single V-belt drive configurations found in HVAC blower systems, exhaust fans, and light-to-medium industrial equipment. The finished bore means the part is ready to install on a matching shaft without additional machining. It accepts 4L or A-profile V-belts, which are among the most commonly used fractional horsepower belt types in residential and light commercial HVAC fan drives and general equipment applications.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eFinished 1-1\/8 inch bore — no additional machining required for matching shaft installation\u003c\/li\u003e\n  \u003cli\u003e4-1\/4 inch outer diameter with 3.5 inch pitch diameter for 4L or A-type V-belts\u003c\/li\u003e\n  \u003cli\u003eSingle groove design for straightforward single-belt drive configurations\u003c\/li\u003e\n  \u003cli\u003eCast iron construction for rigidity and long service life under continuous belt loading\u003c\/li\u003e\n  \u003cli\u003eGroove face width of 7\/8 inch suits standard fractional horsepower belt profiles\u003c\/li\u003e\n  \u003cli\u003eUNSPSC Code 31171804 for procurement classification\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or direct-install single groove sheave for V-belt drive systems using 4L or A-profile belts with a 1-1\/8 inch shaft bore requirement.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by qualified mechanics or HVAC technicians. De-energize all power to the driven equipment and lock out or tag out per site safety procedures before removing or installing any sheave. Verify shaft diameter matches the 1-1\/8 inch finished bore before installation, and ensure proper belt tension and sheave alignment after mounting to prevent premature belt or bearing wear. A setscrew or key may be required to secure the sheave to the shaft — confirm the drive assembly design before proceeding.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSheave Type\u003c\/strong\u003e: Single Groove Sheave\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBore Diameter\u003c\/strong\u003e: 1-1\/8 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOuter Diameter (OD)\u003c\/strong\u003e: 4-1\/4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBelt Pitch Diameter (4L or A Belt)\u003c\/strong\u003e: 3.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGroove Face Width\u003c\/strong\u003e: 7\/8 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length Through Bore\u003c\/strong\u003e: 1-5\/32 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Cast Iron\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBore Type\u003c\/strong\u003e: Finished Bore\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1.7 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31171804\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: 1028307\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BROWNING","offers":[{"title":"Default Title","offer_id":51544528945458,"sku":"1028307","price":107.3,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/29caa5f6ddb744b346157b8b43fb2b80_3790b7af-1f96-4dc2-b0f3-849c939dc20b.jpg?v=1785928871","url":"https:\/\/voomisupply.com\/products\/browning-1028307-single-groove-sheave-1-1-8-in-bore","provider":"Voomi Supply","version":"1.0","type":"link"}