{"product_id":"20mm-ballscrew-sfu2005-rm2005-2000mm-5mm-pitch-precision-cnc-part","title":"20mm Ballscrew SFU2005 RM2005 2000mm 5mm Pitch - Precision CNC Part","description":"\u003cp\u003eIn this review of the 20mm Ballscrew SFU2005 RM2005, the author evaluates a long, precision ball screw aimed at CNC builders and retrofitters who need a low-friction, high-stiffness lead screw for linear motion. The bottom line: this 78.74 in \/ 2000mm, 5mm-pitch unit delivers accurate positioning and reduced drive torque compared with sliding alternatives, making it a practical choice where repeatable movement and low noise matter. The review focuses on real-world use, durability, and whether the C7 precision and included metal nut justify choosing this item for machinery upgrades.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e20mm diameter:\u003c\/strong\u003e Provides a compact, rigid shaft that balances load capacity with ease of integration into small to mid-size machines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5mm pitch:\u003c\/strong\u003e A commonly used lead that offers sensible tradeoffs between speed and resolution for CNC tables and Z axes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2000mm length:\u003c\/strong\u003e Long stroke capability suitable for extended travel applications without field splicing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eC7 precision grade:\u003c\/strong\u003e Manufactured to a consistent tolerance level that improves repeatable positioning over generic rolled screws.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMetal nut with deflector:\u003c\/strong\u003e Reduces contamination and extends service life while maintaining low friction and minimal stick-slip.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis ballscrew is aimed at hobbyist and professional CNC builders, retrofit shops, and industrial users who need a long, rolled-thread ball screw with standard end machining for BK\/BF15 supports. It suits applications where heat buildup, starting torque, and noise must be minimized while keeping good static and dynamic stiffness.\u003c\/p\u003e\u003cp\u003eUsers who require ultra-high tolerance (for example, aerospace inspection fixtures) might prefer a higher precision grade like C5, which the manufacturer can supply on request. Those who need a preassembled driven system with gearbox or integrated motor coupling should look elsewhere for a complete package.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eLow friction design reduces driving power and keeps operation quieter than sliding screws.\u003c\/li\u003e\n\u003cli\u003eHigh static and dynamic stiffness improves positioning accuracy during acceleration and deceleration.\u003c\/li\u003e\n\u003cli\u003eLong 2000mm length and standard BK\/BF15 end machining simplify installation into common support blocks.\u003c\/li\u003e\n\u003cli\u003eNo stick-slip effect and smaller starting torque enable reliable micro-feeding at low speeds.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eThe supplied precision grade is C7; users needing tighter tolerances should request C5.\u003c\/li\u003e\n\u003cli\u003eAs a bare screw and metal nut, additional components such as couplings, seals, and mounting hardware are required for a finished axis.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\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\u003e2000mm (78.74 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\u003ePrecision grade\u003c\/td\u003e\n\u003ctd\u003eC7 (C5 available on request)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard end machining\u003c\/td\u003e\n\u003ctd\u003eFor BK\/BF15 supports\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe SFU2005 RM2005 20mm ballscrew is a solid, value-focused choice for CNC builders who need a long, rolled-thread shaft with reliable low-friction performance and reduced drive power. It offers practical stiffness and precision for most wood, metal, and hobby-grade machining tasks; professionals needing tighter tolerances should request the higher-grade option. Overall, it represents sensible value when paired with appropriate supports and a compatible nut mounting strategy.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIs the nut included?\u003c\/strong\u003e\u003cbr\u003eYes, the package includes one metal deflector ballscrew nut with the screw.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I get a different precision grade?\u003c\/strong\u003e\u003cbr\u003eYes, the seller can provide C5 grade if you contact them for that option.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the screw pre-machined for supports?\u003c\/strong\u003e\u003cbr\u003eYes, it arrives with standard end machining for BK\/BF15 support blocks.\u003c\/p\u003e","brand":"Mssoomm","offers":[{"title":"Default Title","offer_id":48136869085403,"sku":"B088WGXQQF","price":230.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/31MDjbke9TL.jpg?v=1768351487","url":"https:\/\/gearmusthave.com\/products\/20mm-ballscrew-sfu2005-rm2005-2000mm-5mm-pitch-precision-cnc-part","provider":"GearMustHave","version":"1.0","type":"link"}