NP491603 / NP180839 / NP625919
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OEM and Flexible Order Quantities Supported
Specifications
Availability: 100 PCS
Brand: HSN/ Timken/ OEM
Bearing Number: NP491603 / NP180839 / NP625919
Category: Tapered Roller Bearings
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Weight and Dimensions
Bore (d): 630 mm 24.8031 in
Outside Diameter (D): 920 mm 36.2205 in
Width Over Cups (T): 513.5 mm 20.2165 in
Width Over Cones (B): 513.5 mm 20.2165 in
Weight: 1160 KG 2557 lbs
Data from Timken (medias)
Dynamic Radial Load Rating (C1-4 row): 17540 KN 3940000 lbf
Dynamic Radial Load Rating (C90): 1310 KN 293000 lbf
Dynamic Radial Load Rating (C90-4 row): 4540 KN 1022000 lbf
Dynamic Axial Load Rating (Ca90): 672 KN 151000 lbf
e Factor: 0.30
Y1 Factor: 2.24
Y2 Factor: 3.34
K Factor: 1.94
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 NP491603 / NP180839 / NP625919 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 NP491603 / NP180839 / NP625919 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 NP491603 / NP180839 / NP625919 bearings.
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