SIFT BEARING STORE CATALOG

3979/3925TimkenTapered Roller

3979/3925 is a Timken tapered roller bearing, bore 57.15 mm, O.D. 112.71 mm, height 69.85 mm. Dimensions, drawing, interchanges and price.

Cone + cup assembly
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Bore d57.15mm
Outside dia. D112.71mm
Overall width T69.85mm
Dynamic Cr242kN
Weight3kg
Mean dia. dm84.9mm

Original catalogue drawing - Timken TRB Catalog, page 676

3979/3925 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

DdTOutside dia. D112.71 mmBore d57.15 mmOverall width T69.85 mmCup width C57.15 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 diameter57.152.25
DOutside diameter112.7124.4375
TOverall assembly width69.852.75
CCup / outer-ring width57.152.25

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)57.150
Bore d (in)2.2500
Outside dia. D (mm)112.712
Outside dia. D (in)4.4375
Overall width T (mm)69.850
Overall width T (in)2.2500
Cup width C (mm)57.150
Cup width C (in)2.2500

Load ratings & speeds

Basic dynamic load rating Cr (lbs)54300
Basic dynamic load rating Cr (N)242000
Dynamic rating C1 (N, ISO)242000
Dynamic rating C1 (lbf, ISO)54300
Radial rating C90 (N)36000
Radial rating C90 (lbf)8090
Thrust rating Ca90 (N)24800
Thrust rating Ca90 (lbf)5570
Factor e0.40
Factor Y11.68
Factor Y22.50
Factor K1.45

Weight

Weight (kg)3.0

Mounting dimensions (fillets / shoulders)

Shaft shoulder db (mm)72.0
Housing shoulder Da (mm)106.0

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 500 rpm
460,5001023,386
640,33339213,083
830,2501,02434,133
1024,2002,15471,814
1516,1338,323277,449

Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 242,000 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.676 (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
3979/3920TimkenTapered Roller57.15112.7130.05139 kN1.37

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
28682/28621TimkenTapered Roller57.1596.8424.61123 kN0.71
28682/28622TimkenTapered Roller57.1597.6324.61123 kN0.73
28682/28623TimkenTapered Roller57.1598.4224.61123 kN0.75
29665/29620TimkenTapered Roller57.15112.7125.4111 kN1.2
29665/29622DTimkenTapered Roller57.15114.2958.74192 kN2.76
33225/33461TimkenTapered Roller57.15117.4730.16-1.56
33225/33462DTimkenTapered Roller57.15117.4766.67241 kN3.43
387-S/382TimkenTapered Roller57.1598.4221.95108 kN0.64

Request a quotation for 3979/3925

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Online enquiry formrichard@bearingsfit.com