{"product_id":"bk12-thk-ball-screw-support-unit","title":"BK12 THK Ball Screw Support Unit","description":"\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eTHK square fixed-side support unit for ball screws with a 12 mm bearing journal diameter.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe BK12 is a compact, standardised support unit designed to secure the fixed end of a ball screw. It contains a matched set of precision angular-contact bearings arranged in a DF configuration and supplied with the preload correctly adjusted. This provides high axial rigidity, accurate shaft location and straightforward installation without requiring additional bearing adjustment.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe unit is supplied complete with its housing, bearing set, holding lid, collars, seals, lock nut and locking screw.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eProduct characteristics\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eCategory: Ball screw support units\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eManufacturer: THK\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eSeries: BK\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eDesign: Square support unit\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eMounting position: Fixed side\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eBearing journal diameter: 12 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eBearing arrangement: DF angular-contact arrangement\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eBearing accuracy: P5\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eBearing used: 7001 equivalent\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003ePreload: Factory adjusted\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eLubrication: Pre-lubricated bearing assembly\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eHousing material: Steel\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eWeight: 0.410 kg\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eCountry of origin: Japan\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eMain dimensions\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eShaft diameter d: 12 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eLength L: 25 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eL1: 5 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eL2: 29 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eL3: 5 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eHousing width B: 60 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eHousing height H: 43 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eHousing thickness b: 30 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eShaft centre height h1: 25 mm ±0.02 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eB1: 35 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eH1: 32.5 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eE: 18 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eMounting-hole pitch P: 46 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eC1: 13 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eC2: 6 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eSquare dimension T: 19 mm\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eMounting-hole dimensions\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThrough-hole diameter d1: 6.6 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eCounterbore diameter d2: 10.8 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eCounterbore depth h: 1.5 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eHolding-lid thread M: M3\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eCollar dimensions\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eCollar outside diameter D: 14.9 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eCollar thickness t: 5 mm\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eLoad ratings\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eBasic dynamic axial load rating Ca: 6.66 kN\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eStatic permissible axial load: 3.25 kN\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eAxial rigidity: 88 N\/μm\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eComponents supplied\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eHousing: 1\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003ePrecision bearing set: 1\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eHolding lid: 1\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eCollars: 2\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eSeals: 2\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eLock nut: 1\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eHexagonal socket-head locking screw with set piece: 1\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe BK12 is intended for use at the fixed end of a ball screw and can be paired with a THK BF12 supported-side unit. Its compact square housing and factory-adjusted bearing preload reduce installation time while helping maintain accurate and rigid ball-screw positioning.\u003c\/span\u003e\u003c\/p\u003e","brand":"THK","offers":[{"title":"Default Title","offer_id":58559306498429,"sku":"BK12-THK","price":195.05,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0588\/9684\/2842\/files\/THKBKImage1.jpg?v=1787152352","url":"https:\/\/bearing-king.co.uk\/products\/bk12-thk-ball-screw-support-unit","provider":"Bearing King","version":"1.0","type":"link"}