{"product_id":"stihl-chain-sprocket-1148-640-2001","title":"STIHL Chain Sprocket 3\/8\"P - 1148 640 2001","description":"\u003cdiv\u003e\n\u003cp\u003eThe STIHL 1148 640 2001 is a direct-replacement nose sprocket engineered for 3\/8-inch low-profile chain drives, supplying precise angular feedback and regulated rotational mass to maintain cutting efficiency and reduce drivetrain wear. This component interfaces directly with original crankshaft pilot bores to eliminate guide bar runout and restore factory-calibrated chain tension geometry.\u003c\/p\u003e\n\u003cbr\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePrecision-molded outer diameter matched to 3\/8\" P pitch chain roller width specifications\u003c\/li\u003e\n\u003cli\u003eMultispline drive hub centers the guide bar on the crankshaft pilot to suppress harmonic vibration\u003c\/li\u003e\n\u003cli\u003eThrough-hardened steel construction resists abrasive wood particulate and sustained chain tensile loads\u003c\/li\u003e\n\u003cli\u003eFactory-aligned oil passage positioning supports consistent lubrication delivery from standard STIHL pump configurations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cbr\u003e\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eComponent classification: Guide bar nose sprocket\u003c\/li\u003e\n\u003cli\u003eChain pitch specification: 3\/8\" Low Profile (P)\u003c\/li\u003e\n\u003cli\u003eMounting configuration: Standard multispline crankshaft interface\u003c\/li\u003e\n\u003cli\u003eManufacturer part number: 1148 640 2001\u003c\/li\u003e\n\u003cli\u003eSurface treatment: Corrosion-resistant coating over heat-treated substrates\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cbr\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSTIHL MS 170, MS 180, MS 181\u003c\/li\u003e\n\u003cli\u003eSTIHL MS 200, MS 210, MS 220\u003c\/li\u003e\n\u003cli\u003eSTIHL MS 230, MS 250, MS 270, MS 290\u003c\/li\u003e\n\u003cli\u003eSTIHL MSA 120 C-BQ, MSA 140, MSA 200\u003c\/li\u003e\n\u003cli\u003eSTIHL MSO 200, MSO 220\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"STIHL","offers":[{"title":"Default Title","offer_id":58556415017341,"sku":"ST-1148 640 2001","price":19.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/9190\/9056\/files\/st1148_640_2001_2d_0002.jpg?v=1787134084","url":"https:\/\/ripongroundcare.com\/products\/stihl-chain-sprocket-1148-640-2001","provider":"Ripon Ground Care","version":"1.0","type":"link"}