SIFT BEARING STORE CATALOG

421/412ATimkenTapered Roller

421/412A is a Timken tapered roller bearing, bore 35 mm, O.D. 82.55 mm, width 29.08 mm. Dimensions, drawing, interchanges and price.

Cone + cup assembly
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Bore d35mm
Outside dia. D82.55mm
Width B29.08mm
Dynamic Cr116kN
Static C0r124kN
Weight0.76kg
Cr / C0r0.94
Mean dia. dm58.8mm

Original catalogue drawing - Timken TRB Catalog, page 138

421/412A 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. D82.55 mmBore d35 mmWidth B29.08 mmCup width C23.81 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 diameter351.378
DOutside diameter82.553.25
BInner-ring / bearing width29.0831.145
TOverall assembly width28.5751.125
CCup / outer-ring width23.8120.9375
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)35.000
Bore d (in)1.3780
Outside dia. D (mm)82.550
Outside dia. D (in)3.2500
Width B (mm)29.083
Overall width T (mm)28.575
Overall width T (in)1.1250
Cup width C (mm)23.812

Load ratings & speeds

Basic dynamic load rating Cr (lbs)26000
Basic static load rating Cor (lbs)28000
Basic dynamic load rating Cr (N)116000
Basic static load rating C0r (N)124000
Dynamic rating C1 (N, ISO)116000
Dynamic rating C1 (lbf, ISO)26000
Radial rating C90 (N)30000
Radial rating C90 (lbf)6740
Thrust rating Ca90 (N)13500
Thrust rating Ca90 (lbf)3040
Static rating C0 (N)124000
Static rating C0 (lbf)28000
Factor e0.26
Factor Y2.28
Factor K2.22
Geometry factor G134.4
Geometry factor G29.9
Geometry factor Cg0.0731
Effective load centre a (mm)-9.7

Weight

Weight (kg)0.76

Mounting dimensions (fillets / shoulders)

Shaft fillet R max (mm)0.8
Housing fillet r max (mm)1.5
Shaft shoulder da (mm)42.0
Shaft shoulder db (mm)42.5
Housing shoulder Da (mm)77.7
Housing shoulder Db (mm)73.9
Cage projection Aa (mm)1.2
Cage projection Ab (mm)0.8

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 500 rpm
429,0001023,386
619,33339213,083
814,5001,02434,133
1011,6002,15471,814
157,7338,323277,449

Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 116,000 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.138 (dimensions)
Series typeTS

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

Series variants (different suffix)

DesignationBrandTypedDB/TDyn. ratingkg
421/412TimkenTapered Roller3582.5534.92--
421/414TimkenTapered Roller3588.529.08116 kN0.88

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
14139X/14272TimkenTapered Roller3569.0119.58-0.3
19138X/19262TimkenTapered Roller3566.6716.52-0.25
19138X/19283TimkenTapered Roller357216.5250.7 kN0.32
19138X/19283XTimkenTapered Roller357216.5250.7 kN0.32
23691/2362TimkenTapered Roller3573.0326.98--
23691/23620TimkenTapered Roller3573.0326.9889.4 kN0.52
23691/23621TimkenTapered Roller3573.0326.9889.4 kN0.52
259/253TimkenTapered Roller357219.25-0.34

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