{"product_id":"40-chain-sprocket-with-13-tooth-and-7-8-finis-4288","title":"40 Chain Sprocket With 21 Tooth And 7\/8 Finished Bore With Keyway And Set Screws For Secure Mounting And Precise Alignment Designed For Reliable Power Transmission In Industrial, Agricultural, And Machinery Applications Ready To Install Model 40BS21-7\/8","description":"\u003cdiv\u003eSingle #40 Chain Sprocket with 21 Teeth and 7\/8 Bore\u003cbr\u003e\n✔️ 21-tooth #40 chain sprocket with 7\/8 bore, keyway \u0026amp; 2 screws \u003cp\u003eDesigned for power transmission in conveyors, industrial machines, and agricultural equipment, this sprocket pairs with #40 roller chain to transfer rotation efficiently. It ships ready to install with a precision keyway and two set screws for secure mounting.\u003c\/p\u003e \u003cp\u003e✅ Bore Size: 7\/8\" finished bore\u003cbr\u003e✅ Chain Size: #40 roller chain\u003cbr\u003e✅ Teeth: 21\u003cbr\u003e✅ Bore Style: BS\u003cbr\u003e✅ Keyway: 3\/16 x 3\/32\u003cbr\u003e✅ Mounting: Includes 2 set screws\u003cbr\u003e\u003c\/p\u003e \u003cp\u003e💡 What is a chain sprocket used for in power transmission?\u003c\/p\u003e\n\u003cp\u003eA handy component that meshes with a chain to transfer rotational motion to driven equipment, helping to control speed and torque.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDrives chain along the correct pitch for smooth motion\u003c\/li\u003e\n\u003cli\u003eMaintains timing between sprockets for consistent speeds\u003c\/li\u003e\n\u003cli\u003eBuilt with a finished bore, keyway, and set screws for secure mounting\u003c\/li\u003e\n\u003cli\u003eIdeal for conveyors, agricultural machinery, and general drive systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"RBO","offers":[{"title":"Default Title","offer_id":47154099192043,"sku":"40BS21-7\/8","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/3268\/0683\/files\/40-chain-sprocket-21-tooth-7-8-finished-bore-keyway-set-screws-industrial-equipment.jpg?v=1770447287","url":"https:\/\/vxb.com\/products\/40-chain-sprocket-with-13-tooth-and-7-8-finis-4288","provider":"VXB Bearings","version":"1.0","type":"link"}