3578 Universal Tractor Bearing Cone
3578 Universal Tractor Bearing Cone
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One New Aftermarket Replacement Tapered Roller Bearing Cone - Universal Fits John Deere, Fits Case/International Harvester, Fits Caterpillar and More
This single-row tapered roller bearing cone (inner race assembly) is a direct-fit aftermarket replacement for use in tractors, construction equipment, and agricultural machinery across multiple major brands. The cone works in conjunction with a compatible cup (outer race) to handle both radial and axial loads in wheel hubs, axles, transmissions, and steering assemblies. Compatible cup part number is 3520.
Specifications
- Bearing Type: Single-Row Tapered Roller Bearing Cone
- Inside Diameter (Bore): 1.750 in (44.450 mm)
- Cone Width: 1.216 in (30.886 mm)
- Outside Diameter: 3.13 in (approx.)
- Fillet Radius: 0.14 in (3.6 mm)
- Cage Material: Pressed Steel
- Ring/Roller Material: Alloy Steel
- Rows: Single Row
- Compatible Cup: 3520
Compatible Equipment
Fits John Deere: Various tractor and agricultural equipment models (universal-fit bearing by industry number 3578)
Fits Case / Fits Case IH: Various tractor and construction equipment models
Fits Caterpillar (Fits CAT): Various construction and industrial equipment models
This is an industry-standard bearing number used across multiple OEM brands in tractors, combines, loaders, and related equipment. Verify fitment against your machine's parts manual before ordering.
Replaces Part Number(s):
3578, 168421R91, 357836R91, 357842R91, 357848R91, 357849R91, 357850R1, 1B3975, 3578-TIM, 913-3578, M93599, ST2005A
Aftermarket Interchange Numbers
Timken 3578; NTN 3578; Bower 3578. Assembly number: 3578-20024 (cone only). Also sold as part of assembly 3578/3520 and 3578/3525.
New aftermarket replacement part - not remanufactured, not used.
