 
                The Timken ® Syber ® Bearing System Designer Tool now features Smart Selection, enabling users to find the right bearing faster by filtering options based on target life and key dimensions.
A powerful software tool that combines calculators and configurators to assist you with application design, bearing selection, installation, and troubleshooting. It’s free, easy-to-use, and accessible 24/7.
Alex Waye, Timken Application Engineer, shows you how to instantly compute tangential, radial, and axial forces for better design decisions.
| Part Number | d - Bore | D - Outer Diameter | C - Inner Ring Width | B - Outer Ring Width | C0 - Static Radial Rating | C - Dynamic Radial Rating | Reference Thermal Speed Rating (Grease) | Reference Thermal Speed Rating (Oil) | R - Inner Ring "To Clear" Radius | CAD | 
|---|---|---|---|---|---|---|---|---|---|---|
| NJ2228EMAC3 | d - Bore N/A 140 mm | D - Outer Diameter N/A 250 mm9.8425 in | C - Inner Ring Width N/A 68 mm2.6772 in | B - Outer Ring Width N/A 68 mm2.6772 in | C0 - Static Radial Rating N/A 850000 N191000 lbf | C - Dynamic Radial Rating N/A 650000 N146000 lbf | Reference Thermal Speed Rating (Grease) N/A 1800 rpm | Reference Thermal Speed Rating (Oil) N/A 2100 rpm | R - Inner Ring "To Clear" Radius N/A 2.5 mm0.100 in | CAD                                                    
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| NJ228EMAC3 | d - Bore N/A 140 mm | D - Outer Diameter N/A 250 mm9.8425 in | C - Inner Ring Width N/A 42 mm1.6535 in | B - Outer Ring Width N/A 42 mm1.6535 in | C0 - Static Radial Rating N/A 526000 N118000 lbf | C - Dynamic Radial Rating N/A 443000 N99600 lbf | Reference Thermal Speed Rating (Grease) N/A 2200 rpm | Reference Thermal Speed Rating (Oil) N/A 2600 rpm | R - Inner Ring "To Clear" Radius N/A 2.5 mm0.100 in | CAD                                                    
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| NU2228EMAC3 | d - Bore N/A 140 mm | D - Outer Diameter N/A 250 mm9.8425 in | C - Inner Ring Width N/A 68 mm2.6772 in | B - Outer Ring Width N/A 68 mm2.6772 in | C0 - Static Radial Rating N/A 850000 N191000 lbf | C - Dynamic Radial Rating N/A 650000 N146000 lbf | Reference Thermal Speed Rating (Grease) N/A 1800 rpm | Reference Thermal Speed Rating (Oil) N/A 2100 rpm | R - Inner Ring "To Clear" Radius N/A 2.5 mm0.100 in | CAD                                                    
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| NU228EMAC3 | d - Bore N/A 140 mm | D - Outer Diameter N/A 250 mm9.8425 in | C - Inner Ring Width N/A 42 mm1.6535 in | B - Outer Ring Width N/A 42 mm1.6535 in | C0 - Static Radial Rating N/A 526000 N118000 lbf | C - Dynamic Radial Rating N/A 443000 N99600 lbf | Reference Thermal Speed Rating (Grease) N/A 2200 rpm | Reference Thermal Speed Rating (Oil) N/A 2600 rpm | R - Inner Ring "To Clear" Radius N/A 2.5 mm0.100 in | CAD                                                    
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| NJ228EJ | d - Bore N/A 140 mm | D - Outer Diameter N/A 250 mm9.8425 in | C - Inner Ring Width N/A 42 mm1.6535 in | B - Outer Ring Width N/A 42 mm1.6535 in | C0 - Static Radial Rating N/A 526000 N118000 lbf | C - Dynamic Radial Rating N/A 443000 N99600 lbf | Reference Thermal Speed Rating (Grease) N/A 2500 rpm | Reference Thermal Speed Rating (Oil) N/A 2900 rpm | R - Inner Ring "To Clear" Radius N/A 2.5 mm0.100 in | CAD                                                    
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| NU228EJ | d - Bore N/A 140 mm | D - Outer Diameter N/A 250 mm9.8425 in | C - Inner Ring Width N/A 42 mm1.6535 in | B - Outer Ring Width N/A 42 mm1.6535 in | C0 - Static Radial Rating N/A 526000 N118000 lbf | C - Dynamic Radial Rating N/A 443000 N99600 lbf | Reference Thermal Speed Rating (Grease) N/A 2500 rpm | Reference Thermal Speed Rating (Oil) N/A 2900 rpm | R - Inner Ring "To Clear" Radius N/A 2.5 mm0.100 in | CAD                                                    
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| NJ2328EMA | d - Bore N/A 140 mm | D - Outer Diameter N/A 300 mm11.811 in | C - Inner Ring Width N/A 102 mm4.0157 in | B - Outer Ring Width N/A 102 mm4.0157 in | C0 - Static Radial Rating N/A 1420000 N319000 lbf | C - Dynamic Radial Rating N/A 1180000 N265000 lbf | Reference Thermal Speed Rating (Grease) N/A 1400 rpm | Reference Thermal Speed Rating (Oil) N/A 1600 rpm | R - Inner Ring "To Clear" Radius N/A 3 mm0.100 in | CAD                                                    
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| NJ328EMA | d - Bore N/A 140 mm | D - Outer Diameter N/A 300 mm11.811 in | C - Inner Ring Width N/A 62 mm2.4409 in | B - Outer Ring Width N/A 62 mm2.4409 in | C0 - Static Radial Rating N/A 837000 N188000 lbf | C - Dynamic Radial Rating N/A 771000 N173000 lbf | Reference Thermal Speed Rating (Grease) N/A 1900 rpm | Reference Thermal Speed Rating (Oil) N/A 2100 rpm | R - Inner Ring "To Clear" Radius N/A 3 mm0.100 in | CAD                                                    
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| NU2328EMA | d - Bore N/A 140 mm | D - Outer Diameter N/A 300 mm11.811 in | C - Inner Ring Width N/A 102 mm4.0157 in | B - Outer Ring Width N/A 102 mm4.0157 in | C0 - Static Radial Rating N/A 1420000 N319000 lbf | C - Dynamic Radial Rating N/A 1180000 N265000 lbf | Reference Thermal Speed Rating (Grease) N/A 1400 rpm | Reference Thermal Speed Rating (Oil) N/A 1600 rpm | R - Inner Ring "To Clear" Radius N/A 3 mm0.100 in | CAD                                                    
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| NU328EMA | d - Bore N/A 140 mm | D - Outer Diameter N/A 300 mm11.811 in | C - Inner Ring Width N/A 62 mm2.4409 in | B - Outer Ring Width N/A 62 mm2.4409 in | C0 - Static Radial Rating N/A 837000 N188000 lbf | C - Dynamic Radial Rating N/A 771000 N173000 lbf | Reference Thermal Speed Rating (Grease) N/A 1900 rpm | Reference Thermal Speed Rating (Oil) N/A 2100 rpm | R - Inner Ring "To Clear" Radius N/A 3 mm0.100 in | CAD                                                    
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| NJ2328EMAC3 | d - Bore N/A 140 mm | D - Outer Diameter N/A 300 mm11.811 in | C - Inner Ring Width N/A 102 mm4.0157 in | B - Outer Ring Width N/A 102 mm4.0157 in | C0 - Static Radial Rating N/A 1420000 N319000 lbf | C - Dynamic Radial Rating N/A 1180000 N265000 lbf | Reference Thermal Speed Rating (Grease) N/A 1400 rpm | Reference Thermal Speed Rating (Oil) N/A 1600 rpm | R - Inner Ring "To Clear" Radius N/A 3 mm0.100 in | CAD                                                    
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| NJ328EMAC3 | d - Bore N/A 140 mm | D - Outer Diameter N/A 300 mm11.811 in | C - Inner Ring Width N/A 62 mm2.4409 in | B - Outer Ring Width N/A 62 mm2.4409 in | C0 - Static Radial Rating N/A 837000 N188000 lbf | C - Dynamic Radial Rating N/A 771000 N173000 lbf | Reference Thermal Speed Rating (Grease) N/A 1900 rpm | Reference Thermal Speed Rating (Oil) N/A 2100 rpm | R - Inner Ring "To Clear" Radius N/A 3 mm0.100 in | CAD                                                    
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| NJ328EMAC4 | d - Bore N/A 140 mm | D - Outer Diameter N/A 300 mm11.811 in | C - Inner Ring Width N/A 62 mm2.4409 in | B - Outer Ring Width N/A 62 mm2.4409 in | C0 - Static Radial Rating N/A 837000 N188000 lbf | C - Dynamic Radial Rating N/A 771000 N173000 lbf | Reference Thermal Speed Rating (Grease) N/A 1900 rpm | Reference Thermal Speed Rating (Oil) N/A 2100 rpm | R - Inner Ring "To Clear" Radius N/A 3 mm0.100 in | CAD                                                    
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| NU2328EMAC3 | d - Bore N/A 140 mm | D - Outer Diameter N/A 300 mm11.811 in | C - Inner Ring Width N/A 102 mm4.0157 in | B - Outer Ring Width N/A 102 mm4.0157 in | C0 - Static Radial Rating N/A 1420000 N319000 lbf | C - Dynamic Radial Rating N/A 1180000 N265000 lbf | Reference Thermal Speed Rating (Grease) N/A 1400 rpm | Reference Thermal Speed Rating (Oil) N/A 1600 rpm | R - Inner Ring "To Clear" Radius N/A 3 mm0.100 in | CAD                                                    
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| NU328EMAC4 | d - Bore N/A 140 mm | D - Outer Diameter N/A 300 mm11.811 in | C - Inner Ring Width N/A 62 mm2.4409 in | B - Outer Ring Width N/A 62 mm2.4409 in | C0 - Static Radial Rating N/A 837000 N188000 lbf | C - Dynamic Radial Rating N/A 771000 N173000 lbf | Reference Thermal Speed Rating (Grease) N/A 1900 rpm | Reference Thermal Speed Rating (Oil) N/A 2100 rpm | R - Inner Ring "To Clear" Radius N/A 3 mm0.100 in | CAD                                                    
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| NU328EMAC3 | d - Bore N/A 140 mm | D - Outer Diameter N/A 300 mm11.811 in | C - Inner Ring Width N/A 62 mm2.4409 in | B - Outer Ring Width N/A 62 mm2.4409 in | C0 - Static Radial Rating N/A 837000 N188000 lbf | C - Dynamic Radial Rating N/A 771000 N173000 lbf | Reference Thermal Speed Rating (Grease) N/A 1900 rpm | Reference Thermal Speed Rating (Oil) N/A 2100 rpm | R - Inner Ring "To Clear" Radius N/A 3 mm0.100 in | CAD                                                    
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| NJ328EJ | d - Bore N/A 140 mm | D - Outer Diameter N/A 300 mm11.811 in | C - Inner Ring Width N/A 62 mm2.4409 in | B - Outer Ring Width N/A 62 mm2.4409 in | C0 - Static Radial Rating N/A 837000 N188000 lbf | C - Dynamic Radial Rating N/A 771000 N173000 lbf | Reference Thermal Speed Rating (Grease) N/A 2000 rpm | Reference Thermal Speed Rating (Oil) N/A 2300 rpm | R - Inner Ring "To Clear" Radius N/A 3 mm0.100 in | CAD                                                    
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| NU328EJ | d - Bore N/A 140 mm | D - Outer Diameter N/A 300 mm11.811 in | C - Inner Ring Width N/A 62 mm2.4409 in | B - Outer Ring Width N/A 62 mm2.4409 in | C0 - Static Radial Rating N/A 837000 N188000 lbf | C - Dynamic Radial Rating N/A 771000 N173000 lbf | Reference Thermal Speed Rating (Grease) N/A 2000 rpm | Reference Thermal Speed Rating (Oil) N/A 2300 rpm | R - Inner Ring "To Clear" Radius N/A 3 mm0.100 in | CAD                                                    
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| NJ2328EMAC5 | d - Bore N/A 140 mm | D - Outer Diameter N/A 300 mm11.811 in | C - Inner Ring Width N/A 102 mm4.0157 in | B - Outer Ring Width N/A 102 mm4.0157 in | C0 - Static Radial Rating N/A 1420000 N319000 lbf | C - Dynamic Radial Rating N/A 1180000 N265000 lbf | Reference Thermal Speed Rating (Grease) N/A 1500 rpm | Reference Thermal Speed Rating (Oil) N/A 1700 rpm | R - Inner Ring "To Clear" Radius N/A 3 mm0.100 in | CAD                                                    
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| NU1030MA | d - Bore N/A 150 mm | D - Outer Diameter N/A 225 mm8.8583 in | C - Inner Ring Width N/A 35 mm1.378 in | B - Outer Ring Width N/A 35 mm1.378 in | C0 - Static Radial Rating N/A 309000 N69500 lbf | C - Dynamic Radial Rating N/A 231000 N51900 lbf | Reference Thermal Speed Rating (Grease) N/A 2500 rpm | Reference Thermal Speed Rating (Oil) N/A 3100 rpm | R - Inner Ring "To Clear" Radius N/A 1.5 mm0.100 in | CAD                                                    
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| NU1030MAC3 | d - Bore N/A 150 mm | D - Outer Diameter N/A 225 mm8.8583 in | C - Inner Ring Width N/A 35 mm1.378 in | B - Outer Ring Width N/A 35 mm1.378 in | C0 - Static Radial Rating N/A 309000 N69500 lbf | C - Dynamic Radial Rating N/A 231000 N51900 lbf | Reference Thermal Speed Rating (Grease) N/A 2500 rpm | Reference Thermal Speed Rating (Oil) N/A 3100 rpm | R - Inner Ring "To Clear" Radius N/A 1.5 mm0.100 in | CAD                                                    
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| NJ230EMA | d - Bore N/A 150 mm | D - Outer Diameter N/A 270 mm10.6299 in | C - Inner Ring Width N/A 45 mm1.7717 in | B - Outer Ring Width N/A 45 mm1.7717 in | C0 - Static Radial Rating N/A 607000 N136000 lbf | C - Dynamic Radial Rating N/A 506000 N114000 lbf | Reference Thermal Speed Rating (Grease) N/A 2000 rpm | Reference Thermal Speed Rating (Oil) N/A 2400 rpm | R - Inner Ring "To Clear" Radius N/A 2.5 mm0.100 in | CAD                                                    
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| NUP230EMA | d - Bore N/A 150 mm | D - Outer Diameter N/A 270 mm10.6299 in | C - Inner Ring Width N/A 37.545 mm1.4781 in | B - Outer Ring Width N/A 45 mm1.7717 in | C0 - Static Radial Rating N/A 607000 N136000 lbf | C - Dynamic Radial Rating N/A 506000 N114000 lbf | Reference Thermal Speed Rating (Grease) N/A 1800 rpm | Reference Thermal Speed Rating (Oil) N/A 2100 rpm | R - Inner Ring "To Clear" Radius N/A 2.5 mm0.100 in | CAD                                                    
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| NU230EMA | d - Bore N/A 150 mm | D - Outer Diameter N/A 270 mm10.6299 in | C - Inner Ring Width N/A 45 mm1.7717 in | B - Outer Ring Width N/A 45 mm1.7717 in | C0 - Static Radial Rating N/A 607000 N136000 lbf | C - Dynamic Radial Rating N/A 506000 N114000 lbf | Reference Thermal Speed Rating (Grease) N/A 2000 rpm | Reference Thermal Speed Rating (Oil) N/A 2400 rpm | R - Inner Ring "To Clear" Radius N/A 2.5 mm0.100 in | CAD                                                    
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| NJ230EMAC4 | d - Bore N/A 150 mm | D - Outer Diameter N/A 270 mm10.6299 in | C - Inner Ring Width N/A 45 mm1.7717 in | B - Outer Ring Width N/A 45 mm1.7717 in | C0 - Static Radial Rating N/A 607000 N136000 lbf | C - Dynamic Radial Rating N/A 506000 N114000 lbf | Reference Thermal Speed Rating (Grease) N/A 2000 rpm | Reference Thermal Speed Rating (Oil) N/A 2400 rpm | R - Inner Ring "To Clear" Radius N/A 2.5 mm0.100 in | CAD                                                    
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