SIFT BEARING STORE CATALOG

12168/12303TimkenTapered Roller

12168/12303 is a Timken tapered roller bearing, bore 42.86 mm, O.D. 76.99 mm, width 17.14 mm. Dimensions, drawing, interchanges and price.

Cone + cup assembly
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Bore d42.86mm
Outside dia. D76.99mm
Width B17.14mm
Dynamic Cr49.5kN
Static C0r58.1kN
Weight0.33kg
Cr / C0r0.85
Mean dia. dm59.9mm

Original catalogue drawing - Timken TRB Catalog, page 166

12168/12303 Timken Tapered Roller bearing catalogue drawing

Scanned from the manufacturer catalogue page listing this part number. All part numbers printed on that table share the same drawing.

Scale cross-section

DdBOutside dia. D76.99 mmBore d42.86 mmWidth B17.14 mmCup width C11.91 mm

Blue = inner / outer ring, yellow = rolling element. Drawn to scale from this part's own dimensions for selection reference only - not a manufacturing or assembly drawing.

Dimension table (mm / inch)

SymbolDimensionmminch
dBore diameter42.8621.6875
DOutside diameter76.9923.0312
BInner-ring / bearing width17.1450.675
TOverall assembly width17.4620.6875
CCup / outer-ring width11.9080.4688
rChamfer (min)1.50.0591

Notes

Tapered roller bearings are cone / cup assemblies; cone and cup weights are listed separately and the total is their sum. Weights are given in kg. Load ratings are shown in both the original catalogue units and the converted value (1 N = 0.2248 lbf). Data is provided for selection reference only - confirm against the latest official catalogue before ordering.

Main dimensions

Bore d (mm)42.862
Bore d (in)1.6875
Outside dia. D (mm)76.992
Outside dia. D (in)3.0312
Width B (mm)17.145
Overall width T (mm)17.462
Overall width T (in)0.6875
Cup width C (mm)11.908

Load ratings & speeds

Basic dynamic load rating Cr (lbs)11100
Basic static load rating Cor (lbs)13100
Basic dynamic load rating Cr (N)49500
Basic static load rating C0r (N)58100
Dynamic rating C1 (N, ISO)49500
Dynamic rating C1 (lbf, ISO)11100
Radial rating C90 (N)12800
Radial rating C90 (lbf)2890
Thrust rating Ca90 (N)11100
Thrust rating Ca90 (lbf)2500
Static rating C0 (N)58100
Static rating C0 (lbf)13100
Factor e0.51
Factor Y1.19
Factor K1.15
Geometry factor G121.0
Geometry factor G217.5
Geometry factor Cg0.0766
Effective load centre a (mm)0.0

Weight

Weight (kg)0.33
Cone weight (kg)0.23
Cup weight (kg)0.1
Total weight (kg)0.33

Mounting dimensions (fillets / shoulders)

Shaft fillet R max (mm)1.5
Housing fillet r max (mm)1.5
Shaft shoulder da (mm)48.5
Shaft shoulder db (mm)51.0
Housing shoulder Da (mm)73.0
Housing shoulder Db (mm)68.0
Cage projection Aa (mm)1.4
Cage projection Ab (mm)2.2

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 500 rpm
412,3751023,386
68,25039213,083
86,1881,02434,133
104,9502,15471,814
153,3008,323277,449

Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 49,500 N. Hours = L10 x 106 / (60n). Life-modification factors for lubrication, contamination and temperature (aISO) are not included.

Source & traceability

BrandTimken
Source catalogueTimken Tapered Roller Bearing Catalog (2016)
Catalogue pagep.166 (dimensions) / p.68 (cone) / p.68 (cup)
Series typeTS

ISO dynamic rating C1, Timken C90 / Ca90, static rating C0, geometry factors and assembly weight.

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
13169D/13318TimkenTapered Roller42.8680.9631.7588.5 kN0.77
22168/22325TimkenTapered Roller42.8682.5519.8477.4 kN0.44
22168/22325DTimkenTapered Roller42.8682.5544.45135 kN1.01
22780/22720TimkenTapered Roller42.8682.5526.9992.9 kN0.6
25576/25518TimkenTapered Roller42.8681.9725.4-0.55
25576/25521TimkenTapered Roller42.8683.0625.490.5 kN0.57
25578/25520TimkenTapered Roller42.8682.9325.490.5 kN0.58
25578/25520DTimkenTapered Roller42.8682.9357.15158 kN1.48

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