SIFT BEARING STORE CATALOG

3977X/3919RBTimkenTapered Roller

3977X/3919RB is a Timken tapered roller bearing, bore 59.99 mm, O.D. 112.71 mm, width 28 mm. Dimensions, drawing, interchanges and price.

Cone + cup assembly
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Bore d59.99mm
Outside dia. D112.71mm
Width B28mm
Weight1.26kg
Mean dia. dm86.3mm

Original catalogue drawing - Timken - Single Row

3977X/3919RB 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. D112.71 mmBore d59.99 mmWidth B28 mmCup width C24.61 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 diameter59.9872.3617
DOutside diameter112.7124.4375
BInner-ring / bearing width281.1024
TOverall assembly width30.1621.1875
CCup / outer-ring width24.6050.9687
rChamfer (min)3.30.1299

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)59.987
Bore d (in)2.3617
Outside dia. D (mm)112.712
Outside dia. D (in)4.4375
Width B (mm)28.000
Width B (in)1.1024
Overall width T (mm)30.162
Overall width T (in)1.1875
Cup width C (mm)24.605
Cup width C (in).9687

Weight

Cone weight (kg)0.84
Cup weight (kg)0.42
Total weight (kg)1.26

Mounting dimensions (fillets / shoulders)

Shaft fillet R max (mm)2.3
Housing fillet r max (mm)3.3

Source & traceability

BrandTimken
Source catalogueTimken Bearing Dimension Catalog
Catalogue pagep.311 (dimensions) / p.55 (cone) / p.55 (cup)

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

Same dimensions, same brand

DesignationBrandTypedDB/TDyn. ratingkg
3977X/3920TimkenTapered Roller59.99112.7128139 kN1.29

Series variants (different suffix)

DesignationBrandTypedDB/TDyn. ratingkg
3977X/3920TimkenTapered Roller59.99112.7128139 kN1.29
3977X/3921XATimkenTapered Roller59.99109.9828139 kN1.2

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
39236/39412TimkenTapered Roller59.99104.7822115 kN0.74
39236/39433TimkenTapered Roller59.99110.0622115 kN0.86
558-S/552TimkenTapered Roller59.99123.8336.68-2.13
558-S/552DTimkenTapered Roller59.99123.8379.38332 kN4.31
558-S/553-SATimkenTapered Roller59.99129.9436.68191 kN2.37
558-S/553ATimkenTapered Roller59.9912536.68191 kN2.13
6391/6320TimkenTapered Roller59.99135.7556.01-3.83
H913840/H913810TimkenTapered Roller59.99146.0539.69273 kN3.19

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