{"product_id":"3-8-chainsaw-rim-sprocket-small-7-spline-18720","title":"3\/8\" Chainsaw Rim Sprocket 7 Tooth Small 7 Spline – LN18720","description":"\u003ch1\u003e\u003cspan\u003e3\/8\" Chainsaw Rim Sprocket 7 Tooth Small 7 Spline – LN18720\u003c\/span\u003e\u003c\/h1\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eProfessional quality \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e3\/8\" pitch 7-tooth chainsaw rim sprocket\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e designed for chainsaws using a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eSmall 7 Spline (SM7) clutch drum system\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eManufactured from tough, wear-resistant steel for durability, smooth chain operation and reliable power transfer from the chainsaw engine to the saw chain.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe floating rim sprocket design allows the saw chain to naturally align with the guide bar groove, helping provide smoother cutting and more even wear across the chain, guide bar and drive components.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eSmall 7 Spline rim sprocket\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is physically different from the more common Standard 7 Spline rim. Always check the size of your existing rim sprocket before ordering.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePRODUCT DETAILS\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin: 0cm 0cm 0cm 18.0pt;\"\u003e\u003cb\u003e\u003cspan style=\"font-family: 'Segoe UI Emoji',sans-serif; mso-bidi-font-family: 'Segoe UI Emoji';\"\u003e✅\u003c\/span\u003e3\/8\" Pitch Rim sprocket\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin: 0cm 0cm 0cm 18.0pt;\"\u003e\u003cb\u003e\u003cspan style=\"font-family: 'Segoe UI Emoji',sans-serif; mso-bidi-font-family: 'Segoe UI Emoji';\"\u003e✅\u003c\/span\u003e7-Tooth Configuration\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin: 0cm 0cm 0cm 18.0pt;\"\u003e\u003cb\u003e\u003cspan style=\"font-family: 'Segoe UI Emoji',sans-serif; mso-bidi-font-family: 'Segoe UI Emoji';\"\u003e✅\u003c\/span\u003eSmall 7 Spline (SM7) Fitment\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin: 0cm 0cm 0cm 18.0pt;\"\u003e\u003cb\u003e\u003cspan style=\"font-family: 'Segoe UI Emoji',sans-serif; mso-bidi-font-family: 'Segoe UI Emoji';\"\u003e✅\u003c\/span\u003eHardened Wear-Resistant Steel\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin: 0cm 0cm 0cm 18.0pt;\"\u003e\u003cb\u003e\u003cspan style=\"font-family: 'Segoe UI Emoji',sans-serif; mso-bidi-font-family: 'Segoe UI Emoji';\"\u003e✅\u003c\/span\u003eExceptional reliability\u003c\/b\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin: 0cm 0cm 0cm 18.0pt;\"\u003e\u003cb\u003e\u003cspan style=\"font-family: 'Segoe UI Emoji',sans-serif; mso-bidi-font-family: 'Segoe UI Emoji';\"\u003e✅\u003c\/span\u003eProfessional performance\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin: 0cm 0cm 0cm 18.0pt;\"\u003e\u003cb\u003e\u003cspan style=\"font-family: 'Segoe UI Emoji',sans-serif; mso-bidi-font-family: 'Segoe UI Emoji';\"\u003e✅\u003c\/span\u003eSmoother cutting performance \u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin: 0cm 0cm 0cm 18.0pt;\"\u003e\u003cb\u003e\u003cspan style=\"font-family: 'Segoe UI Emoji',sans-serif; mso-bidi-font-family: 'Segoe UI Emoji';\"\u003e✅\u003c\/span\u003eDesigned to Reduce Uneven Chain \u0026amp; Bar Wear\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin: 0cm 0cm 0cm 18.0pt;\"\u003e\u003cb\u003e\u003cspan style=\"font-family: 'Segoe UI Emoji',sans-serif; mso-bidi-font-family: 'Segoe UI Emoji';\"\u003e✅\u003c\/span\u003eEasy Replacement Rim Design\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin: 0cm 0cm 0cm 18.0pt;\"\u003e\u003cb\u003e\u003cspan style=\"font-family: 'Segoe UI Emoji',sans-serif; mso-bidi-font-family: 'Segoe UI Emoji';\"\u003e✅\u003c\/span\u003eHelps Maintain Correct Chain Alignment\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin: 0cm 0cm 0cm 18.0pt;\"\u003e\u003cb\u003e\u003cspan style=\"font-family: 'Segoe UI Emoji',sans-serif; mso-bidi-font-family: 'Segoe UI Emoji';\"\u003e✅\u003c\/span\u003eProfessional Forestry Grade Performance \u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin: 0cm 0cm 0cm 18.0pt;\"\u003e \u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eOEM CROSS REFERENCE\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e• \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eOregon 18720\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003e• GB GBA7S7\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eSMALL 7 SPLINE – IMPORTANT\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThis sprocket uses the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eSmall 7 Spline (SM7)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e configuration.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eIt should \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003enot be confused with the Standard 7 Spline (SD7) 3\/8\" 7-tooth rim sprocket\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, commonly cross-referenced as Oregon 68210.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eAlthough both sprockets are:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e• 3\/8\" Pitch\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e• 7 Tooth\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e• 7 Spline\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e…the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003ecentre spline size is different\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, meaning they are not interchangeable.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eIf your existing rim is marked \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e18720 or SM7\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, this is the small spline version you require.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eWHY USE A RIM SPROCKET?\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eA rim sprocket forms the connection between the chainsaw clutch drum and saw chain.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eUnlike a fixed spur sprocket, the replaceable rim floats slightly on the clutch drum spline, allowing the chain to align naturally with the guide bar groove.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThis design helps provide:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003e✅ Smoother Chain Operation\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003e✅ Improved Chain Alignment\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003e✅ More Even Sprocket Wear\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003e✅ Reduced Saw Chain Wear\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003e✅ Longer Guide Bar \u0026amp; Drive Component Life\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe replaceable design also allows the rim sprocket itself to be changed without replacing the complete clutch drum, provided the existing drum remains serviceable.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eWHEN SHOULD I REPLACE MY RIM SPROCKET?\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe chainsaw rim sprocket is a wear component and should be inspected regularly.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eAs the sprocket wears, grooves can develop where the saw chain drive links contact the rim. Excessive wear can result in poor chain engagement, vibration and accelerated wear of both the chain and guide bar.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eFor best cutting performance, regularly inspect the rim sprocket when replacing your chainsaw chain and replace it when excessive wear is visible.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eSMALL 7 SPLINE OR STANDARD 7 SPLINE?\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThis is particularly important when purchasing a replacement chainsaw sprocket.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eSmall 7 Spline (SM7)\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eSmaller centre spline – this product.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eStandard 7 Spline (SD7)\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eLarger centre spline – a different rim sprocket.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eBoth versions are available in \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e3\/8\" pitch and 7-tooth configurations\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, so pitch and tooth count alone are not enough to determine correct fitment.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eIMPORTANT FITMENT INFORMATION\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eBefore ordering, compare this sprocket with your existing rim and confirm:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e• \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003ePitch – 3\/8\"\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e• \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eTooth Count – 7 Tooth\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e• \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eSpline – Small 7 Spline (SM7)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e• \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eCross Reference – Oregon 18720\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIf you're unsure which rim sprocket fits your chainsaw, contact Longer Chainsaws with your chainsaw make and model before ordering.\u003c\/span\u003e\u003c\/p\u003e","brand":"Longer","offers":[{"title":"LONGER \/ 1 Pack","offer_id":42764771721441,"sku":"LN18720","price":8.5,"currency_code":"AUD","in_stock":true},{"title":"LONGER \/ 5 Pack","offer_id":42764771754209,"sku":"LN18720X5","price":28.0,"currency_code":"AUD","in_stock":true},{"title":"LONGER \/ 10 Pack","offer_id":42764771786977,"sku":"LN18720X10","price":49.9,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/1526\/5249\/products\/AJP6100.jpg?v=1776017639","url":"https:\/\/www.longerchainsaws.com.au\/products\/3-8-chainsaw-rim-sprocket-small-7-spline-18720","provider":"Longer Chainsaws","version":"1.0","type":"link"}