{"product_id":"timken-2mm9305wi-dum-spindle-precision-machine-tool-angular-contact-bearing","title":"Timken 2MM9305WI DUM Spindle \u0026 Precision Machine Tool Angular Contact Bearing","description":"\u003ch3 data-section-id=\"17lc1ru\" data-start=\"0\" data-end=\"16\"\u003eDescription:\u003c\/h3\u003e\n\u003cp data-start=\"17\" data-end=\"627\"\u003eThe Timken 2MM9305WIDUM (Manufacturing Part Number: 2MM9305WI DUM, World Part Number: 71905C-T-P4S-DUM) is a matched duplex set of super precision single-row angular contact ball bearings from the Timken Fafnir® 9300WI series. Factory matched with DUM (medium preload), this bearing set is designed for high-speed machine tool spindles requiring exceptional rigidity, low runout, and precise shaft positioning. It is commonly used in CNC machining centers, milling machines, grinding machines, jig borers, precision lathes, and other high-accuracy manufacturing equipment. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"5ms9th\" data-start=\"629\" data-end=\"646\"\u003eApplications:\u003c\/h3\u003e\n\u003cp data-start=\"647\" data-end=\"1145\"\u003eThe Timken 2MM9305WIDUM bearing set is engineered for high-speed spindle applications where accuracy, rigidity, and thermal stability are critical. Its duplex medium preload arrangement increases spindle stiffness, improves rotational accuracy, and minimizes vibration, making it ideal for CNC machining centers, high-speed milling machines, grinding machines, machining spindles, routers, and other industrial machine tools requiring super precision bearings. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"5hg6bl\" data-start=\"1147\" data-end=\"1176\"\u003eTechnical Specifications:\u003c\/h3\u003e\n\u003cp data-start=\"1177\" data-end=\"2653\"\u003e• Manufacturer Part Number (MPN): 2MM9305WIDUM (Manufacturing Part Number: 2MM9305WI DUM)\u003cbr data-start=\"1266\" data-end=\"1269\"\u003e• World Part Number: 71905C-T-P4S-DUM\u003cbr data-start=\"1306\" data-end=\"1309\"\u003e• Manufacturer: Timken Fafnir\u003cbr data-start=\"1338\" data-end=\"1341\"\u003e• Product Type: Super precision angular contact ball bearing set\u003cbr data-start=\"1405\" data-end=\"1408\"\u003e• Bearing Type: Duplex matched single-row angular contact ball bearings\u003cbr data-start=\"1479\" data-end=\"1482\"\u003e• Series: 9300WI (ISO 71905C)\u003cbr data-start=\"1511\" data-end=\"1514\"\u003e• Bore Diameter (ID): 25 mm\u003cbr data-start=\"1541\" data-end=\"1544\"\u003e• Outside Diameter (OD): 42 mm (1.654 in)\u003cbr data-start=\"1585\" data-end=\"1588\" data-is-only-node=\"\"\u003e• Bearing Width (Single): 9 mm (0.354 in)\u003cbr data-start=\"1629\" data-end=\"1632\"\u003e• Total Width (Duplex Set): 18 mm (0.709 in)\u003cbr data-start=\"1676\" data-end=\"1679\"\u003e• Contact Angle: 15°\u003cbr data-start=\"1699\" data-end=\"1702\"\u003e• Arrangement: Duplex matched pair\u003cbr data-start=\"1736\" data-end=\"1739\"\u003e• Preload: DUM (Medium preload)\u003cbr data-start=\"1770\" data-end=\"1773\"\u003e• Ball Material: Steel\u003cbr data-start=\"1795\" data-end=\"1798\"\u003e• Cage Type: CR outer land riding cage\u003cbr data-start=\"1836\" data-end=\"1839\"\u003e• Cage Material: MBR phenolic cage\u003cbr data-start=\"1873\" data-end=\"1876\"\u003e• Precision Rating: ISO P4S (ABEC 7\/9 equivalent)\u003cbr data-start=\"1925\" data-end=\"1928\"\u003e• Static Radial Load Rating (C0): 5,750 N (1,290 lbf) per bearing\u003cbr data-start=\"1993\" data-end=\"1996\"\u003e• Dynamic Radial Load Rating (Ce): 9,040 N (2,030 lbf) per bearing\u003cbr data-start=\"2062\" data-end=\"2065\"\u003e• ISO Dynamic Radial Load Rating (C1): 8,220 N (1,840 lbf) per bearing\u003cbr data-start=\"2135\" data-end=\"2138\"\u003e• Limiting Speed (Grease): 34,800 rpm\u003cbr data-start=\"2175\" data-end=\"2178\"\u003e• Limiting Speed (Oil): 69,600 rpm\u003cbr data-start=\"2212\" data-end=\"2215\"\u003e• Maximum Shaft Fillet Radius: 0.30 mm (0.012 in)\u003cbr data-start=\"2264\" data-end=\"2267\"\u003e• Maximum Housing Fillet Radius: 0.30 mm (0.012 in)\u003cbr data-start=\"2318\" data-end=\"2321\"\u003e• Function: Supports combined radial and axial loads in high-speed precision spindle applications.\u003cbr data-start=\"2419\" data-end=\"2422\"\u003e• Features: Factory-matched duplex set, medium preload, super precision construction, low runout, high rigidity, optimized for high-speed machine tool spindles, and excellent thermal stability. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"1cz0398\" data-start=\"2655\" data-end=\"2679\"\u003eCommon Replacements:\u003c\/h3\u003e\n\u003cp data-start=\"2680\" data-end=\"2859\"\u003e• Timken 2MM9305WIDUM super precision bearing set\u003cbr data-start=\"2729\" data-end=\"2732\"\u003e• SKF 71905 CD\/P4A duplex bearing set\u003cbr data-start=\"2769\" data-end=\"2772\"\u003e• NSK 71905CTYNSULP4 duplex bearing set\u003c\/p\u003e","brand":"Timken","offers":[{"title":"New","offer_id":51714062352686,"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_aa915819-8fbc-47a8-88a1-b6ea40c98708.jpg?v=1770415324","url":"https:\/\/plgautomation.com\/products\/timken-2mm9305wi-dum-spindle-precision-machine-tool-angular-contact-bearing","provider":"PLG Automation ","version":"1.0","type":"link"}