SIFT BEARING STORE CATALOG

378A/372TimkenTapered Roller

378A/372 is a Timken tapered roller bearing, bore 49.99 mm, O.D. 100 mm, width 22.23 mm, weight 0.86 kg. Dimensions, drawing, interchanges and price.

Cone + cup assembly
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Bore d49.99mm
Outside dia. D100mm
Width B22.23mm
Weight0.86kg
Mean dia. dm75mm

Original catalogue drawing - Timken - Single Row

378A/372 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. D100 mmBore d49.99 mmWidth B22.23 mmCup width C21.82 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 diameter49.9871.968
DOutside diameter1003.937
BInner-ring / bearing width22.2250.875
TOverall assembly width250.9843
CCup / outer-ring width21.8240.8592
rChamfer (min)20.0787

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)49.987
Bore d (in)1.9680
Outside dia. D (mm)100.000
Outside dia. D (in)3.9370
Width B (mm)22.225
Width B (in).8750
Overall width T (mm)25.000
Overall width T (in).9842
Cup width C (mm)21.824
Cup width C (in).8592

Weight

Cone weight (kg)0.43
Cup weight (kg)0.43
Total weight (kg)0.86

Mounting dimensions (fillets / shoulders)

Shaft fillet R max (mm)2.3
Housing fillet r max (mm)2.0

Source & traceability

BrandTimken
Source catalogueTimken Bearing Dimension Catalog
Catalogue pagep.309 (dimensions) / p.26 (cone) / p.26 (cup)

Dimensions and component weights only - this catalogue publishes no load ratings or speeds.

Series variants (different suffix)

DesignationBrandTypedDB/TDyn. ratingkg
378A/372ATimkenTapered Roller49.9996.8422.2387.9 kN0.72

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
28579/28520TimkenTapered Roller49.9989.9825.498.9 kN0.66
28579/28521TimkenTapered Roller49.9992.0825.498.9 kN0.7
55194/55434TimkenTapered Roller49.99109.9826.91-1.23
HH506349/HH506310TimkenTapered Roller49.99114.344.45-2.32
HH506349/HH506311TimkenTapered Roller49.99114.344.45246 kN2.25
L305648/L305610TimkenTapered Roller49.9980.9618.2660.8 kN0.36
L305648/L305611TimkenTapered Roller49.9979.9718.2660.8 kN0.34
LM104947A/JLM104910TimkenTapered Roller49.998222.2396.3 kN0.44

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