{"product_id":"thk-bk25-ball-screw-support-bearing-unit-bk25","title":"THK BK25 Ball Screw Support Bearing Unit BK25","description":"\u003ch3 data-section-id=\"17lc1ru\" data-start=\"0\" data-end=\"16\"\u003eDescription:\u003c\/h3\u003e\n\u003cp data-start=\"18\" data-end=\"681\"\u003eThe THK BK25 Ball Screw Support Bearing Unit is a fixed-side support unit designed for 25 mm ball screw shafts, incorporating factory-preloaded angular contact bearings for precise axial positioning and high-rigidity support. Commonly installed in CNC machine tools, industrial automation systems, semiconductor equipment, packaging machinery, robotics, and precision manufacturing equipment utilizing ball screw drive systems. Machine builders, maintenance technicians, and \u003ca href=\"https:\/\/plgautomation.com\/collections\/hmi-operator-interfaces\"\u003esystem integrators\u003c\/a\u003e use this support unit for new machine construction, retrofits, repairs, and replacement of fixed-end ball screw bearing assemblies. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"5ms9th\" data-start=\"683\" data-end=\"700\"\u003eApplications:\u003c\/h3\u003e\n\u003cp data-start=\"702\" data-end=\"1385\"\u003eThe THK BK25 belongs to THK's standardized BK Series fixed-side support units for ball screw assemblies. It features a rigid cast housing with preloaded JIS Class 5 angular contact bearings to eliminate axial play while maintaining excellent rotational accuracy and stiffness. Designed to work with compatible BF25 floating-side support units, the BK25 provides accurate shaft alignment, high load capacity, and long service life in demanding linear motion applications. It is widely used in CNC machining centers, automated assembly systems, precision inspection equipment, and factory automation where reliable ball screw support is essential. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"5hg6bl\" data-start=\"1387\" data-end=\"1416\"\u003eTechnical Specifications:\u003c\/h3\u003e\n\u003cp data-start=\"1418\" data-end=\"2370\"\u003e• Brand: THK\u003cbr data-start=\"1430\" data-end=\"1433\"\u003e• Part Number: BK25\u003cbr data-start=\"1452\" data-end=\"1455\"\u003e• Reference Number: 131217\u003cbr data-start=\"1481\" data-end=\"1484\"\u003e• Product Type: Fixed-Side Ball Screw Support Bearing Unit\u003cbr data-start=\"1542\" data-end=\"1545\"\u003e• Series: BK Support Unit Series\u003cbr data-start=\"1577\" data-end=\"1580\"\u003e• Ball Screw Shaft Diameter: 25 mm\u003cbr data-start=\"1614\" data-end=\"1617\"\u003e• Housing Type: Square Fixed-Side Support Unit\u003cbr data-start=\"1663\" data-end=\"1666\"\u003e• Bearing Type: Factory-Preloaded Angular Contact Bearings\u003cbr data-start=\"1724\" data-end=\"1727\"\u003e• Bearing Accuracy: JIS Class 5\u003cbr data-start=\"1758\" data-end=\"1761\"\u003e• Shaft Thread Compatibility: M25 × 1.5\u003cbr data-start=\"1800\" data-end=\"1803\"\u003e• Housing Height (H): 80 mm\u003cbr data-start=\"1830\" data-end=\"1833\"\u003e• Housing Width (B): 106 mm\u003cbr data-start=\"1860\" data-end=\"1863\"\u003e• Housing Length (L): 42 mm\u003cbr data-start=\"1890\" data-end=\"1893\"\u003e• Shaft Bore: 25 mm\u003cbr data-start=\"1912\" data-end=\"1915\"\u003e• Housing Material: High-Strength Steel\/Cast Steel\u003cbr data-start=\"1965\" data-end=\"1968\"\u003e• Mounting Style: Fixed-End Flange Mount\u003cbr data-start=\"2008\" data-end=\"2011\"\u003e• Compatible Floating Support Unit: THK BF25\u003cbr data-start=\"2055\" data-end=\"2058\"\u003e• Compatible Ball Screw Series: THK Precision and Rolled Ball Screws with BK25 shaft-end machining\u003cbr data-start=\"2156\" data-end=\"2159\"\u003e• Features: Factory-preloaded bearings, high axial rigidity, low runout, precision alignment, maintenance-free operation, compact standardized design, high-speed capability. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"1cz0398\" data-start=\"2372\" data-end=\"2396\"\u003eCommon Replacements:\u003c\/h3\u003e\n\u003cp data-start=\"2398\" data-end=\"2472\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e• THK BK20\u003cbr data-start=\"2408\" data-end=\"2411\"\u003e• THK BK30\u003cbr data-start=\"2421\" data-end=\"2424\"\u003e• THK FK30\u003c\/p\u003e","brand":"THK","offers":[{"title":"New","offer_id":51713990525230,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0818\/1038\/files\/Ebay_website_image_72d5d2a3-72cb-41fc-a7c6-a07f2f385b44.jpg?v=1770413150","url":"https:\/\/plgautomation.com\/products\/thk-bk25-ball-screw-support-bearing-unit-bk25","provider":"PLG Automation ","version":"1.0","type":"link"}