NP639186 / NP980566 / NP423191
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All Data Sourced from Official Brands
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Brand Alternative Bearings with Identical Specifications
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Customized Bearing Solutions Based on Parameters
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Fast Quotation Response
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OEM and Flexible Order Quantities Supported
Specifications
Availability: 100 PCS
Brand: HSN/ Timken/ OEM
Bearing Number: NP639186 / NP980566 / NP423191
Category: Tapered Roller Bearings
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Weight and Dimensions
Bore (d): 260 mm 10.2362 in
Outside Diameter (D): 440 mm 17.3228 in
Width Over Cups (T): 300 mm 11.8110 in
Width Over Cones (B): 300 mm 11.8110 in
Weight: 176 KG 387 lbs
Data from Timken (medias)
Dynamic Radial Load Rating (C1-4 row): 4520 KN 1016000 lbf
Dynamic Radial Load Rating (C90): 336 KN 75600 lbf
Dynamic Radial Load Rating (C90-4 row): 1170 KN 264000 lbf
Dynamic Axial Load Rating (Ca90): 397 KN 89100 lbf
e Factor: 0.69
Y1 Factor: 0.98
Y2 Factor: 1.46
K Factor: 0.85
Product Properties
Precision: P0, P6, P5
Hardness: HRC58-62
Ring Material: GCr15, GCr15SiMn, 100CrMnSi6-4, etc.
Cage Material: Brass, Steel
Certificate: ISO9001:2015
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Downloads & Links
Timken Tapered Roller Bearings Guide
Product Description
The Timken NP639186 / NP980566 / NP423191 four-row tapered roller bearing features a TQOW configuration consisting of two double cones, four rows of tapered rollers and cages, one cone spacer, two single cups, two cup spacers, and one double cup. This design provides high radial and axial load capacity, excellent rigidity, and reliable stability under heavy combined loads. Lubrication slots on the cone faces facilitate lubricant distribution, while the hardened cone spacer helps minimize face wear and supports long-term bearing performance.
The Timken NP639186 / NP980566 / NP423191 bearing is designed for rolling mill roll-neck applications, including work rolls, intermediate rolls, and backup rolls in flat product mills, as well as work rolls in long product mills. Its robust four-row construction supports heavy rolling loads, stable roll positioning, and consistent performance under demanding operating conditions. HSN provides replacement bearing solutions for United States steel mills, OEM equipment manufacturers, and industrial distributors seeking alternatives to Timken NP639186 / NP980566 / NP423191 bearings.
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