{"product_id":"20mm-ballscrew-sfu2005-rm2005-1280mm-5mm-pitch-high-precision-cnc","title":"20mm Ballscrew SFU2005 RM2005 1280mm 5mm Pitch - High Precision CNC","description":"\u003cp\u003eIn this review of the 20mm Ballscrew SFU2005 RM2005 the bottom line is simple: this is a precision mechanical component aimed at hobbyists and light industrial CNC builders who need low-friction, accurate linear motion over a long span. The reviewer found the 20mm diameter shaft, 5mm lead and 1280mm total length deliver stable travel with reduced starting torque and little heat buildup, and the included metal nut with standard BK\/BF15 end machining makes installation straightforward on compatible machines. This is a focused, no-frills part for projects where repeatable positioning and long service life matter.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n \u003cli\u003e\n\u003cstrong\u003e20mm diameter:\u003c\/strong\u003e Provides a compact but stiff shaft suitable for light to medium load linear stages while keeping overall weight low.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003e5mm pitch lead:\u003c\/strong\u003e Balances speed and resolution so users can run higher feed rates without sacrificing reasonable positional accuracy.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003e1280mm total length:\u003c\/strong\u003e Offers a long travel capability for extended gantries or custom CNC tables without coupling multiple shorter screws.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003ePrecision C7 grade:\u003c\/strong\u003e Ensures consistent nut-to-shaft fit and repeatable positioning for shop fixtures and DIY machines.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eRolled thread GCr15 steel:\u003c\/strong\u003e Delivers long service life with low friction and reduced operation noise compared with sliding alternatives.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eStandard BK\/BF15 end machining:\u003c\/strong\u003e Simplifies mounting to compatible bearing blocks and end supports for quicker integration.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis ballscrew suits hobby machinists, small CNC fabricators and automation tinkerers who need a long, precision rolled screw for linear motion with lower heat and small starting torque. It is especially useful when a single continuous length of 1280mm is preferred over assembled segments.\u003c\/p\u003e\n\u003cp\u003eThose building heavy industrial machinery or systems requiring tighter tolerances than C7 should look for alternative grades and heavier diameter screws; likewise, if you need a preloaded anti-backlash assembly with integrated bellows or specific end forms beyond BK\/BF15, consider asking the seller for customization or a different model.\u003c\/p\u003e\n\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n \u003cli\u003eLow friction ball motion reduces heat and driving power for smoother continuous travel.\u003c\/li\u003e\n \u003cli\u003eHigh static and dynamic stiffness yields more accurate positioning compared with sliding screws.\u003c\/li\u003e\n \u003cli\u003eStandard end machining for BK\/BF15 and included metal nut make installation easier for common setups.\u003c\/li\u003e\n \u003cli\u003eFactory seller offers customization and wider product range if other lengths or grades are needed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n \u003cli\u003eC7 precision is suitable for many applications but not as tight as C5 when the highest accuracy is required.\u003c\/li\u003e\n \u003cli\u003eLong single-piece length may be cumbersome to handle during installation on compact workspaces.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n \u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eSFU2005 RM2005\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e20mm\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eLead \/ Pitch\u003c\/td\u003e\n\u003ctd\u003e5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eTotal length\u003c\/td\u003e\n\u003ctd\u003e1280mm (50.39 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eNut type\u003c\/td\u003e\n\u003ctd\u003eMetal deflector ballscrew nut (included)\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eGCr15 steel, rolled thread\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003ePrecision grade\u003c\/td\u003e\n\u003ctd\u003eC7 (C5 available on request)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe 20mm Ballscrew SFU2005 RM2005 is a pragmatic choice for DIY CNC builders and light industrial users who need a long, durable linear actuator with low starting torque and quieter operation. It delivers good stiffness and repeatability for the price, and factory customization options make it a sensible long-term part for projects that may later require alternative lengths or tighter grades.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this come with end machining for standard supports?\u003c\/strong\u003e\u003cbr\u003eYes, it is supplied with standard end machining for BK\/BF15 bearing supports to simplify mounting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat precision grade is supplied?\u003c\/strong\u003e\u003cbr\u003eThe screw is supplied in \u003cstrong\u003eC7\u003c\/strong\u003e grade; the seller can provide \u003cstrong\u003eC5\u003c\/strong\u003e grade on request for tighter tolerances.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs a nut included and what type is it?\u003c\/strong\u003e\u003cbr\u003eA metal deflector ballscrew nut is included with the screw in the package for immediate installation.\u003c\/p\u003e","brand":"Mssoomm","offers":[{"title":"Default Title","offer_id":48247297704155,"sku":"B088W5FS5Q","price":170.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/31MDjbke9TL_6f861715-8453-46ae-888c-4a34ca3e8bd2.jpg?v=1771059494","url":"https:\/\/gearmusthave.com\/products\/20mm-ballscrew-sfu2005-rm2005-1280mm-5mm-pitch-high-precision-cnc","provider":"GearMustHave","version":"1.0","type":"link"}