{"product_id":"timken-bearing-34478","title":"Timken Bearing 34478","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=\"656\"\u003eThe Timken 34478 is a single tapered roller bearing cup (outer ring) from the Timken 34000 Series. Designed for use with compatible Timken tapered roller bearing cones such as the 34300, 34300A, 34301, or 34304 to form a complete single-row tapered roller bearing assembly, it is engineered to support combined radial and axial loads while maintaining precise shaft alignment. Its separable cup design simplifies installation, adjustment, and maintenance, making it ideal for industrial gearboxes, heavy-duty conveyors, mining equipment, construction machinery, and general power transmission systems. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"5ms9th\" data-start=\"658\" data-end=\"675\"\u003eApplications:\u003c\/h3\u003e\n\u003cp data-start=\"676\" data-end=\"1086\"\u003eThe Timken 34478 bearing cup is designed for heavy-duty applications requiring high load capacity and reliable performance under combined radial and thrust loads. When paired with a compatible Timken cone, it is commonly used in industrial gearboxes, rolling mills, mining machinery, agricultural equipment, construction equipment, and other heavy-duty rotating equipment. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"5hg6bl\" data-start=\"1088\" data-end=\"1117\"\u003eTechnical Specifications:\u003c\/h3\u003e\n\u003cp data-start=\"1118\" data-end=\"2466\"\u003e• Manufacturer Part Number (MPN): 34478\u003cbr data-start=\"1157\" data-end=\"1160\"\u003e• Manufacturer: Timken\u003cbr data-start=\"1182\" data-end=\"1185\"\u003e• Product Type: Tapered roller bearing cup\u003cbr data-start=\"1227\" data-end=\"1230\"\u003e• Bearing Type: Single-row tapered roller bearing cup (TS)\u003cbr data-start=\"1288\" data-end=\"1291\"\u003e• Series: 34000 Series\u003cbr data-start=\"1313\" data-end=\"1316\"\u003e• Compatible Cone Part Numbers: 34300, 34300A, 34301, 34304 (application dependent)\u003cbr data-start=\"1399\" data-end=\"1402\"\u003e• Outside Diameter (OD): 4.7812 in (121.442 mm)\u003cbr data-start=\"1449\" data-end=\"1452\"\u003e• Cup Width (C): 0.6875 in (17.463 mm)\u003cbr data-start=\"1490\" data-end=\"1493\" data-is-only-node=\"\"\u003e• Design Units: Inch\u003cbr data-start=\"1513\" data-end=\"1516\"\u003e• Bearing Material: Through-hardened bearing steel\u003cbr data-start=\"1566\" data-end=\"1569\"\u003e• Dynamic Radial Load Rating (C1): 102,000 N (23,000 lbf) (assembly dependent)\u003cbr data-start=\"1647\" data-end=\"1650\"\u003e• Dynamic Radial Load Rating (C90): 26,500 N (5,960 lbf) (assembly dependent)\u003cbr data-start=\"1727\" data-end=\"1730\"\u003e• Static Radial Load Rating (C0): 136,000 N (30,600 lbf) (assembly dependent)\u003cbr data-start=\"1807\" data-end=\"1810\"\u003e• Dynamic Axial Load Rating (Ca90): 20,500 N (4,600 lbf)\u003cbr data-start=\"1866\" data-end=\"1869\"\u003e• e Factor: 0.45\u003cbr data-start=\"1885\" data-end=\"1888\"\u003e• K Factor: 1.30\u003cbr data-start=\"1904\" data-end=\"1907\"\u003e• Y Factor: 1.33\u003cbr data-start=\"1923\" data-end=\"1926\"\u003e• Geometry Factor (Cg): 0.109\u003cbr data-start=\"1955\" data-end=\"1958\"\u003e• Maximum Housing Fillet Radius: 0.080 in (2.03 mm)\u003cbr data-start=\"2009\" data-end=\"2012\"\u003e• Housing Backing Shoulder Diameter (Da): 4.60 in (116.1 mm)\u003cbr data-start=\"2072\" data-end=\"2075\"\u003e• Weight: Approximately 1.10 kg (2.4 lb)\u003cbr data-start=\"2115\" data-end=\"2118\"\u003e• Function: Serves as the outer ring component of a single-row tapered roller bearing assembly supporting combined radial and axial loads.\u003cbr data-start=\"2256\" data-end=\"2259\"\u003e• Features: Precision-ground raceway, separable cup design, optimized internal geometry, high load capacity, and long service life for demanding industrial applications. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"1cz0398\" data-start=\"2468\" data-end=\"2492\"\u003eCommon Replacements:\u003c\/h3\u003e\n\u003cp data-start=\"2493\" data-end=\"2697\"\u003e• Timken 34478 tapered roller bearing cup\u003cbr data-start=\"2534\" data-end=\"2537\"\u003e• SKF equivalent tapered roller bearing cup (application dependent)\u003cbr data-start=\"2604\" data-end=\"2607\"\u003e• NTN equivalent tapered roller bearing cup\u003c\/p\u003e","brand":"Timken","offers":[{"title":"New","offer_id":51714060124462,"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_dc679d33-b885-4be5-8d81-fb0f146564ae.jpg?v=1770415228","url":"https:\/\/plgautomation.com\/products\/timken-bearing-34478","provider":"PLG Automation ","version":"1.0","type":"link"}