{"product_id":"bk25-thk-ball-screw-support-unit","title":"BK25 THK Ball Screw Support Unit","description":"\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eTHK square fixed-side support unit for ball screws with a 25 mm bearing journal diameter.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe BK25 contains a factory-preloaded P5 angular-contact bearing set in a DF arrangement, providing accurate shaft positioning and high axial rigidity. Its compact housing allows straightforward installation without 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: 25 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: 7205 equivalent\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003ePreload: Factory adjusted\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eWeight: 2.300 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: 25 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eLength L: 42 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eL1: 12 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eL2: 54 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eL3: 9 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eHousing width B: 106 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eHousing height H: 80 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eHousing thickness b: 53 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eShaft centre height h1: 48 mm ±0.02 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eB1: 64 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eH1: 70 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eE: 33 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eMounting-hole pitch P: 85 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eC1: 22 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eC2: 10 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eSquare dimension T: 35 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: 11 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eCounterbore diameter d2: 17.5 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eCounterbore depth h: 11 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eHolding-lid thread M: M5\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: 31.3 mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eCollar thickness t: 9 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: 20.2 kN\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eStatic permissible axial load: 11.5 kN\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eAxial rigidity: 190 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 BK25 is designed for the fixed end of a ball screw and can be paired with a THK BF25 supported-side unit.\u003c\/span\u003e\u003c\/p\u003e","brand":"THK","offers":[{"title":"Default Title","offer_id":58559414337917,"sku":"BK25-THK","price":403.36,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0588\/9684\/2842\/files\/THKBKImage1_d0abdaa9-4ff3-4df1-8351-ff1cc134524e.jpg?v=1787155518","url":"https:\/\/bearing-king.co.uk\/products\/bk25-thk-ball-screw-support-unit","provider":"Bearing King","version":"1.0","type":"link"}