• Timken--Double-Row-Non-Adjustable-Industrial-Tapered-Roller-Bearing--TNA--Main_Family-Picture-2026
Timken double-row non-adjustable (TNA) bearings feature extended inner race narrow faces that eliminate the need for a separate inner race spacer. This innovative design reduces assembly time and complexity, making it ideal for high-performance machinery. Supplied with an in-built clearance to give a standard setting range, these bearings provide a solution for many fixed or floating bearing applications in sectors such as manufacturing, mining, construction equipment, and power transmission systems.
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Bore (d) (in)

Bore (d) (mm)

O.D. (D) (in)

O.D. (D) (mm)

Width (T) (in)

Width (T) (mm)

Dynamic Radial Load Rating - 1M Revs (C1) (lbf)

Dynamic Radial Load Rating - 1M Revs (C1) (N)

Part Number

Bore (d)

O.D. (D)

Width (T)

Outer Ring Width (C)

Dynamic Radial Load Rating - 1M Revs (C1)

CAD

HM252349NA / HM252315CD N/A 10.2500 in260.350 mm N/A 16.9970 in431.724 mm N/A 6.8125 in173.038 mm N/A 5.0625 in128.588 mm N/A 605000 lbf2690000 N N/A
HM252348NA / HM252315CD N/A 10.2500 in260.350 mm N/A 16.9970 in431.724 mm N/A 6.8125 in173.038 mm N/A 5.0625 in128.588 mm N/A 587000 lbf2610000 N N/A
NA329116 / 329173CD N/A 11.8420 in300.787 mm N/A 17.2460 in438.048 mm N/A 6.3750 in161.925 mm N/A 4.875 in123.825 mm N/A 422000 lbf1880000 N N/A
NA329115 / 329173CD N/A 11.8420 in300.787 mm N/A 17.2460 in438.048 mm N/A 6.3750 in161.925 mm N/A 4.875 in123.825 mm N/A 432000 lbf1920000 N N/A
NA329116 / 329176D N/A 11.8420 in300.787 mm N/A 17.5 in444.5 mm N/A 6.3750 in161.925 mm N/A 6.375 in161.925 mm N/A 422000 lbf1880000 N N/A
NA329120 / 329173CD N/A 12 in304.8 mm N/A 17.2460 in438.048 mm N/A 6.3750 in161.925 mm N/A 4.875 in123.825 mm N/A 422000 lbf1880000 N N/A
NA329121 / 329173CD N/A 12 in304.8 mm N/A 17.2460 in438.048 mm N/A 6.3750 in161.925 mm N/A 4.875 in123.825 mm N/A 432000 lbf1920000 N N/A
NA231400 / 232026D N/A 14 in355.6 mm N/A 20.2500 in514.350 mm N/A 5.75 in146.05 mm N/A 4.25 in107.95 mm N/A 412000 lbf1830000 N N/A
NA285160 / 285228D N/A 16.0000 in406.400 mm N/A 22.6250 in574.675 mm N/A 6.1875 in157.162 mm N/A 4.1875 in106.363 mm N/A 434000 lbf1930000 N N/A
NA26118SW / 26284D N/A 1.1806 in29.987 mm N/A 2.8336 in71.973 mm N/A 1.6835 in42.76 mm N/A 1.4375 in36.513 mm N/A 27300 lbf121000 N N/A
NA438SW / 432D N/A 1 3/4 in44.450 mm N/A 3.7500 in95.250 mm N/A 2.4376 in61.915 mm N/A 2 in50.8 mm N/A 49700 lbf221000 N N/A
NA3780SW / 3729D N/A 2 in50.8 mm N/A 3.6718 in93.264 mm N/A 2.5625 in65.088 mm N/A 2.0625 in52.388 mm N/A 47800 lbf213000 N N/A
NA455SW / 452D N/A 2 in50.8 mm N/A 4.25 in107.95 mm N/A 2.5626 in65.090 mm N/A 2.1250 in53.975 mm N/A 53100 lbf236000 N N/A
NA558SW / 552D N/A 2 3/8 in60.325 mm N/A 4.8750 in123.825 mm N/A 3.125 in79.375 mm N/A 2.5 in63.5 mm N/A 74700 lbf332000 N N/A
NA643SW / 632D N/A 2 3/4 in69.850 mm N/A 5.3750 in136.525 mm N/A 3.75 in95.250 mm N/A 3 in76.2 mm N/A 91200 lbf406000 N N/A
NA484SW / 472D N/A 2.7559 in70 mm N/A 4.7244 in120 mm N/A 2.5626 in65.090 mm N/A 2.1250 in53.975 mm N/A 56100 lbf250000 N N/A
NA495SW / 493D N/A 3 in76.2 mm N/A 5.3750 in136.525 mm N/A 2.75 in69.85 mm N/A 2.1250 in53.975 mm N/A 60500 lbf269000 N N/A
NA659SW / 654D N/A 3 in76.2 mm N/A 6.000 in152.4 mm N/A 3.75 in95.250 mm N/A 3 in76.2 mm N/A 96700 lbf430000 N N/A
NA497SW / 493D N/A 3.3750 in85.725 mm N/A 5.3750 in136.525 mm N/A 2.875 in73.025 mm N/A 2.1250 in53.975 mm N/A 57100 lbf254000 N N/A
NA593SW / 592D N/A 3 1/2 in88.9 mm N/A 6.000 in152.4 mm N/A 3.25 in82.55 mm N/A 2.5 in63.5 mm N/A 84600 lbf376000 N N/A
NA759SW / 752D N/A 3 1/2 in88.9 mm N/A 6.3750 in161.925 mm N/A 4.125 in104.775 mm N/A 3.375 in85.725 mm N/A 128000 lbf570000 N N/A
NA776SW / 773D N/A 3 3/4 in95.250 mm N/A 7.0866 in180 mm N/A 4.125 in104.775 mm N/A 3.375 in85.725 mm N/A 135000 lbf603000 N N/A
NA776SW / 774D N/A 3 3/4 in95.250 mm N/A 7.1250 in180.975 mm N/A 4.125 in104.775 mm N/A 3.375 in85.725 mm N/A 135000 lbf603000 N N/A
NA691SW / 672D N/A 4 in101.600 mm N/A 6.625 in168.275 mm N/A 3.6250 in92.075 mm N/A 2.75 in69.85 mm N/A 104000 lbf461000 N N/A
L163149NW / L163110CD N/A 14 in355.6 mm N/A 17.5 in444.5 mm N/A 5.3750 in136.525 mm N/A 4.375 in111.125 mm N/A 287000 lbf1280000 N N/A
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