{"product_id":"browning-1027580-single-groove-sheave-1in-bore-12-25in-od","title":"Browning 1027580 Single Groove Sheave 1in Bore 12.25in Od","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe BROWNING 1027580 is a finished bore single groove sheave designed for V-belt drive systems in HVAC, industrial, and mechanical power transmission applications. The sheave features a 1 inch finished bore diameter and a 12.25 inch outer diameter, machined from cast iron for durability and dimensional stability under continuous load. The groove width measures 0.75 inches. With a pitch diameter of 12.0 inches for 4L and A-series belts, this sheave delivers accurate belt tracking and consistent drive performance. HVAC technicians and mechanical contractors install this component on fan assemblies, blowers, and belt-driven equipment requiring a single groove drive configuration.\u003c\/p\u003e\u003cp\u003eThis sheave is suited for residential and light commercial HVAC fan and blower applications, as well as general industrial belt drive systems. The finished bore is ready for installation onto a 1 inch shaft without additional machining. The cast iron construction handles the rotational stress and heat typical of continuously operating motor and fan drive assemblies. Technicians working on supply air blowers, exhaust fans, and centrifugal fan units will find this sheave a direct fit where a single groove, 1 inch bore pulley is specified.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eFinished bore at 1 inch — ready for direct shaft installation with no additional machining\u003c\/li\u003e\n\u003cli\u003e12.25 inch outer diameter with 12.0 inch pitch diameter for 4L and A-series V-belts\u003c\/li\u003e\n\u003cli\u003ePitch diameter of 11.66 inches for 3L-series belts\u003c\/li\u003e\n\u003cli\u003eSingle groove design for straightforward single-belt drive configurations\u003c\/li\u003e\n\u003cli\u003eCast iron construction provides rigidity and resistance to wear under continuous operation\u003c\/li\u003e\n\u003cli\u003eBore length through hub is 1-15\/32 inches for adequate shaft engagement\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or new-installation sheave for single groove V-belt drive systems using 4L, A-series, or 3L-series belts on 1 inch diameter shafts.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified HVAC technician or millwright following applicable mechanical and electrical codes. Disconnect and lock out all power to the drive system before removing or installing any sheave or belt component. Ensure the shaft is clean and free of burrs before sliding the finished bore sheave into position, and verify sheave alignment with a straightedge before tensioning the belt. Do not operate the drive without proper belt guards in place per applicable safety standards.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBore Diameter\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOuter Diameter\u003c\/strong\u003e: 12.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePitch Diameter (4L \/ A-Series Belt)\u003c\/strong\u003e: 12.0 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePitch Diameter (3L-Series Belt)\u003c\/strong\u003e: 11.66 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGroove Width\u003c\/strong\u003e: 0.75 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBore Length Through Hub\u003c\/strong\u003e: 1-15\/32 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Cast Iron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGroove Configuration\u003c\/strong\u003e: Single Groove\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: 5.9 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31171804\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: 1027580\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BROWNING","offers":[{"title":"Default Title","offer_id":51538311217458,"sku":"1027580","price":255.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/29caa5f6ddb744b346157b8b43fb2b80_cdc0bd82-9ddd-4b06-bf6f-309ddf527f85.jpg?v=1785822673","url":"https:\/\/voomisupply.com\/products\/browning-1027580-single-groove-sheave-1in-bore-12-25in-od","provider":"Voomi Supply","version":"1.0","type":"link"}