{"product_id":"timken-mm40bs72quh-quadruplex-angular-contact-ball-screw-support-bearing","title":"Timken MM40BS72QUH Quadruplex Angular Contact Ball Screw Support Bearing","description":"\u003ch3 data-section-id=\"17lc1ru\" data-start=\"0\" data-end=\"16\" class=\"PDq2pG_selectionAnchorContainer\"\u003eDescription:\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cp data-start=\"17\" data-end=\"1025\"\u003eThe Timken Fafnir MM40BS72QUH is a factory-matched quadruplex angular contact ball screw support bearing set consisting of four precision single-row angular contact ball bearings arranged with a heavy preload (QUH). Specifically engineered for ball screw support applications, this matched bearing set delivers exceptional axial stiffness, high positioning accuracy, and reliable support for combined radial and axial loads in precision motion systems. Commonly installed in CNC machine tools, precision automation equipment, industrial gearboxes, conveyors, machine positioning systems, and power transmission systems, the MM40BS72QUH bearing set provides outstanding rigidity and repeatable performance in demanding industrial environments. Maintenance teams, OEMs, and system integrators specify this factory-matched bearing set for equipment repair, replacement, machine rebuilds, and retrofits where high-precision motion control and long service life are critical. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"5ms9th\" data-start=\"1027\" data-end=\"1044\"\u003eApplications:\u003c\/h3\u003e\n\u003cp data-start=\"1045\" data-end=\"1670\"\u003eThe Timken Fafnir MM40BS72QUH quadruplex ball screw support bearing set is designed for precision industrial applications requiring maximum axial rigidity, accurate shaft positioning, and smooth operation under combined radial and axial loads. It is widely used in CNC machining centers, ball screw assemblies, industrial automation equipment, precision positioning systems, heavy-duty machine tools, and power transmission systems where the heavy-preload quadruplex arrangement minimizes deflection, improves repeatability, enhances machining accuracy, and extends bearing service life. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"5hg6bl\" data-start=\"1672\" data-end=\"1701\"\u003eTechnical Specifications:\u003c\/h3\u003e\n\u003cp data-start=\"1702\" data-end=\"2614\"\u003e• Manufacturer: Timken Fafnir\u003cbr data-start=\"1731\" data-end=\"1734\"\u003e• Manufacturer Part Number (MPN): MM40BS72QUH\u003cbr data-start=\"1779\" data-end=\"1782\"\u003e• Product Type: Matched quadruplex ball screw support bearing set\u003cbr data-start=\"1847\" data-end=\"1850\"\u003e• Bearing Type: Precision single-row angular contact ball bearings (quadruplex set)\u003cbr data-start=\"1933\" data-end=\"1936\"\u003e• Series: MM-BS (Ball Screw Support)\u003cbr data-start=\"1972\" data-end=\"1975\"\u003e• Design Series: QUH (Quadruplex, Heavy Preload)\u003cbr data-start=\"2023\" data-end=\"2026\"\u003e• Bore Diameter: 40 mm\u003cbr data-start=\"2048\" data-end=\"2051\"\u003e• Outside Diameter: 72 mm (2.8346 in)\u003cbr data-start=\"2088\" data-end=\"2091\"\u003e• Width(s): 15 mm per bearing; 60 mm total set width\u003cbr data-start=\"2143\" data-end=\"2146\"\u003e• Cage Type: Phenolic outer land riding cage\u003cbr data-start=\"2190\" data-end=\"2193\"\u003e• Material: Bearing steel with steel balls\u003cbr data-start=\"2235\" data-end=\"2238\"\u003e• Load Type: Combined radial and axial loads\u003cbr data-start=\"2282\" data-end=\"2285\"\u003e• Dynamic Rating: 8,160 lbf (36,300 N) per row\u003cbr data-start=\"2331\" data-end=\"2334\"\u003e• Static Rating: 10,200 lbf (45,400 N) per row\u003cbr data-start=\"2380\" data-end=\"2383\"\u003e• Weight: Approximately 2.32 lb (1.05 kg)\u003cbr data-start=\"2424\" data-end=\"2427\"\u003e• Compatible Configuration: Factory-matched quadruplex (QUH) set with heavy preload; components are not intended to be mixed with unmatched bearings. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"1cz0398\" data-start=\"2616\" data-end=\"2640\"\u003eCommon Replacements:\u003c\/h3\u003e\n\u003cp data-start=\"2641\" data-end=\"2789\"\u003e• Timken Fafnir MM40BS72QUH matched set\u003cbr data-start=\"2680\" data-end=\"2683\"\u003e• Timken Fafnir MM40BS72QUL matched set\u003cbr data-start=\"2722\" data-end=\"2725\"\u003e• OEM equivalent 40 mm quadruplex ball screw support bearing set\u003c\/p\u003e","brand":"TIMKEN","offers":[{"title":"New","offer_id":51714034073902,"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_86b6d51a-ee54-4dad-9760-260352685495.jpg?v=1770414427","url":"https:\/\/plgautomation.com\/products\/timken-mm40bs72quh-quadruplex-angular-contact-ball-screw-support-bearing","provider":"PLG Automation ","version":"1.0","type":"link"}