{"product_id":"4b-four-groove-b-section-cast-iron-sheave-sk-bushing","title":"4B Four-Groove B-Section Cast Iron V-Belt Sheave — SK Bushing Type (Bushing Sold Separately)","description":"\u003cp\u003eThe 4B four-groove B-section cast iron V-belt sheave is a precision-machined, statically balanced pulley built for heavy-duty, four-belt power transmission on air compressors, blowers, fans, pumps and industrial machinery. It runs four matched B (also 5L) V-belts and uses the popular \u003cstrong\u003eSK-type tapered QD bushing\u003c\/strong\u003e for a secure, concentric grip on the shaft. The bushing is \u003cstrong\u003esold separately\u003c\/strong\u003e, letting you match the exact bore you need to your shaft or motor frame.\u003c\/p\u003e\n\u003ch3\u003eKey specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eConfiguration: Four-groove (4 belts)\u003c\/li\u003e\n\u003cli\u003eBelt section: B \/ 5L (5\/8\" top width)\u003c\/li\u003e\n\u003cli\u003eMaterial: Class 30 gray cast iron, precision-machined and balanced\u003c\/li\u003e\n\u003cli\u003eBushing system: SK-type tapered QD bushing — \u003cem\u003esold separately\u003c\/em\u003e\n\u003c\/li\u003e\n\u003cli\u003eBore: set by the SK bushing you select (finished bore)\u003c\/li\u003e\n\u003cli\u003eOutside diameters: 7.35\" through 13.95\"\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTypical applications\u003c\/h3\u003e\n\u003cp\u003eAir compressors, blowers and fans, centrifugal and positive-displacement pumps, conveyors, and general industrial drive systems where four B-section belts share the load for maximum torque capacity.\u003c\/p\u003e\n\u003cp\u003eNot sure which bushing size you need? Add your shaft diameter or motor frame to the end of the part number and we'll include the correct SK bushing (example: 4B70-SK-1-3\/8\"). This 4B four-groove B-section cast iron sheave delivers reliable, balanced V-belt power transmission across a range of outside diameters.\u003c\/p\u003e","brand":"Warthog Air Compressor Store","offers":[{"title":"7.35\" OD (4B70-SK)","offer_id":54385675436307,"sku":"4B70-SK","price":181.0,"currency_code":"USD","in_stock":true},{"title":"7.75\" OD (4B74-SK)","offer_id":54385675469075,"sku":"4B74-SK","price":188.0,"currency_code":"USD","in_stock":true},{"title":"8.35\" OD (4B80-SK)","offer_id":54385675501843,"sku":"4B80-SK","price":194.0,"currency_code":"USD","in_stock":true},{"title":"8.95\" OD (4B86-SK)","offer_id":54385675534611,"sku":"4B86-SK","price":208.0,"currency_code":"USD","in_stock":true},{"title":"9.75\" OD (4B94-SK)","offer_id":54385675567379,"sku":"4B94-SK","price":231.0,"currency_code":"USD","in_stock":true},{"title":"11.35\" OD (4B110-SK)","offer_id":54385675600147,"sku":"4B110-SK","price":254.0,"currency_code":"USD","in_stock":true},{"title":"12.75\" OD (4B124-SK)","offer_id":54385675632915,"sku":"4B124-SK","price":285.0,"currency_code":"USD","in_stock":true},{"title":"13.95\" OD (4B136-SK)","offer_id":54385675665683,"sku":"4B136-SK","price":341.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0825\/3141\/8387\/files\/4B38SD__11684.1781071022.jpg?v=1783367651","url":"https:\/\/aircompressorstore.com\/products\/4b-four-groove-b-section-cast-iron-sheave-sk-bushing","provider":"Warthog Air Compressor Store","version":"1.0","type":"link"}