{"product_id":"ball-screw-end-support-unit-fk10-fk20-ff10-ff20-bearing-housing","title":"Ball Screw End Support Unit FK10–FK20 FF10–FF20 Bearing Housing","description":"\n\u003ch2\u003eBall Screw End Support Unit – FK\/FF Series (FK10 to FK20 \/ FF10 to FF20)\u003c\/h2\u003e\n\u003cp\u003eUpgrade your CNC machine, linear motion system, or precision mechanical assembly with the \u003cstrong\u003eKANDE BEARINGS Ball Screw End Support Unit\u003c\/strong\u003e. Available across the full FK10–FK20 and FF10–FF20 range, these bearing housings are engineered to deliver stable, accurate axial and radial support for ball screw shafts — keeping your drive system aligned under demanding loads.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e⚠️ Please Note:\u003c\/strong\u003e The listed price covers a \u003cstrong\u003esingle support unit\u003c\/strong\u003e complete with deep groove ball bearings, lock nut, and mounting hardware kit. If you require angular contact bearings (seven-contact bearing configuration), please contact the seller before ordering to confirm compatibility and pricing.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFull Series Coverage:\u003c\/strong\u003e Choose from FK10, FK12, FK15, FK17, FK20 (fixed-end) and FF10, FF12, FF15, FF17, FF20 (floating-end) to match your exact shaft diameter (10 mm – 20 mm).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecise Shaft Support:\u003c\/strong\u003e Engineered bearing housing ensures accurate alignment of ball screw shafts, minimizing vibration and improving positioning repeatability.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eComplete Kit Included:\u003c\/strong\u003e Each unit ships with deep groove ball bearings, a lock nut, and all necessary hardware — ready to install straight out of the box.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e Manufactured to tight tolerances for long service life in CNC routers, milling machines, 3D printers, and other linear-motion equipment.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFK (Fixed-End) \u0026amp; FF (Floating-End) Options:\u003c\/strong\u003e Select the correct end-type for proper constraint of your ball screw assembly — fixed end for axial constraint, floating end to accommodate thermal expansion.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Compatibility:\u003c\/strong\u003e Guide diameter range of 10 mm to 20 mm fits the most common ball screw shaft sizes used in hobbyist and industrial CNC builds.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eKANDE BEARINGS\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel Numbers\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFK10, FK12, FK15, FK17, FK20 \/ FF10, FF12, FF15, FF17, FF20\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShaft Diameter Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10 mm – 20 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBearing Type (Standard)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDeep Groove Ball Bearing\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIncludes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBearing Housing, Deep Groove Ball Bearing, Lock Nut, Mounting Hardware Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEnd Types\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFK = Fixed End | FF = Floating End\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in China\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's in the Box?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1× Ball Screw End Support Bearing Housing (FK or FF, your selected model)\u003c\/li\u003e\n  \u003cli\u003eDeep groove ball bearing(s)\u003c\/li\u003e\n  \u003cli\u003eLock nut\u003c\/li\u003e\n  \u003cli\u003eMounting hardware kit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompatible Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCNC routers and milling machines\u003c\/li\u003e\n  \u003cli\u003e3D printers with ball screw Z-axis drives\u003c\/li\u003e\n  \u003cli\u003eLinear actuator assemblies\u003c\/li\u003e\n  \u003cli\u003eLaser engravers and plasma cutters\u003c\/li\u003e\n  \u003cli\u003eIndustrial automation and precision positioning stages\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/10-20mm-diamond-flat-grinding-wheel-dry-and-wet-use-heavy-duty-concrete-grinder-wheel-blue-vacuum-brazed\"\u003e10\/20mm Diamond Flat Grinding Wheel – Heavy Duty Dry \u0026amp; Wet Use\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/10pcs-durable-gold-blade-nut-metal-universal-trimmer-accessories-anti-loosening-line-left-hand-thread-replacement-parts-1\"\u003e10pcs Durable Gold Blade Nut Metal Universal Trimmer Accessories\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/stainless-steel-self-tapping-screws-m2-2-m4-8-phillips-wood-hinge\"\u003e10PCS Stainless Steel Self-Tapping Screws M2.2–M4.8 Phillips\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/personal-protective-equipment\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on personal protective equipment\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What is the difference between the FK and FF ball screw end support units?\u003c\/h4\u003e\n\u003cp\u003eA: The FK (fixed-end) support unit is designed to fully constrain the ball screw shaft in the axial direction, preventing movement along the shaft axis. The FF (floating-end) unit allows slight axial movement to accommodate thermal expansion of the screw during operation. A properly configured ball screw assembly uses one FK fixed-end unit and one FF floating-end unit.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Does the listing price include bearings and hardware?\u003c\/h4\u003e\n\u003cp\u003eA: Yes — the listed price is for a single support unit that includes deep groove ball bearings, a lock nut, and a full mounting hardware kit. If you need angular contact bearings instead of standard deep groove ball bearings, please contact the seller prior to purchase to discuss availability and pricing.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Which shaft diameter should I select for my ball screw?\u003c\/h4\u003e\n\u003cp\u003eA: Choose the model number that matches your ball screw shaft diameter: FK10\/FF10 for 10 mm shafts, FK12\/FF12 for 12 mm, FK15\/FF15 for 15 mm, FK17\/FF17 for 17 mm, and FK20 for 20 mm shafts. Always verify your shaft diameter before ordering.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Are these support units suitable for CNC router builds?\u003c\/h4\u003e\n\u003cp\u003eA: Absolutely. The FK\/FF series ball screw end support units from KANDE BEARINGS are widely used in DIY and professional CNC router, milling, and linear-motion builds due to their precise tolerances, complete hardware inclusion, and broad size range from 10 mm to 20 mm.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is the difference between the FK and FF ball screw end support units?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The FK (fixed-end) support unit is designed to fully constrain the ball screw shaft in the axial direction, preventing movement along the shaft axis. The FF (floating-end) unit allows slight axial movement to accommodate thermal expansion of the screw during operation. 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