SIFT BEARING STORE CATALOG

748-S/742DTimkenTapered Roller

748-S/742D is a Timken tapered roller bearing, bore 76.2 mm, O.D. 155.57 mm, height 101.6 mm. Dimensions, drawing, interchanges and price.

Cone + cup assembly
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Bore d76.2mm
Outside dia. D155.57mm
Overall width T101.6mm
Dynamic Cr656kN
Weight8.73kg
Mean dia. dm115.9mm

Original catalogue drawing - Timken TRB Catalog, page 542

748-S/742D 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. D155.57 mmBore d76.2 mmOverall width T101.6 mmCup width C85.72 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 diameter76.23
DOutside diameter155.5756.125
TOverall assembly width101.64
CCup / outer-ring width85.7253.375
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)76.200
Bore d (in)3.0000
Outside dia. D (mm)155.575
Outside dia. D (in)6.1250
Overall width T (mm)101.600
Overall width T (in)4.0000
Cup width C (mm)85.725
Cup width C (in)3.3750

Load ratings & speeds

Basic dynamic load rating Cr (lbs)147000
Basic dynamic load rating Cr (N)656000
Dynamic rating C1 (N, ISO)656000
Dynamic rating C1 (lbf, ISO)147000
Radial rating C90 (N)97600
Radial rating C90 (lbf)21900
Thrust rating Ca90 (N)54400
Thrust rating Ca90 (lbf)12200
Factor e0.33
Factor Y12.08
Factor Y23.09
Factor K1.80
Geometry factor G1159.6
Geometry factor G226.3
Geometry factor Cg0.0898

Weight

Weight (kg)8.73

Mounting dimensions (fillets / shoulders)

Shaft fillet R max (mm)3.5
Housing fillet r max (mm)1.5
Shaft shoulder db (mm)93.0
Housing shoulder Da (mm)143.0

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 500 rpm
4164,0001023,386
6109,33339213,083
882,0001,02434,133
1065,6002,15471,814
1543,7338,323277,449

Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 656,000 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.542 (dimensions)
Series typeTDO

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

Series variants (different suffix)

DesignationBrandTypedDB/TDyn. ratingkg
748-S/742TimkenTapered Roller76.2150.0946.67377 kN3.66
748/742TimkenTapered Roller80150.0946.67318 kN3.49
748/742DTimkenTapered Roller80155.57101.6553 kN8.38
748/743TimkenTapered Roller8015046.67318 kN3.44

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
27684/27620TimkenTapered Roller76.2125.4125.4117 kN1.22
27684A/27620TimkenTapered Roller76.2125.4125.4111 kN1.23
34300/34472XTimkenTapered Roller76.212023.01-0.89
34300/34478TimkenTapered Roller76.2121.4423.01102 kN0.95
34300/34478DTimkenTapered Roller76.2121.4452.39178 kN1.98
34301/34478TimkenTapered Roller76.2121.4423.01102 kN0.94
34301/34478DTimkenTapered Roller76.2121.4452.39178 kN1.96
34301/34500TimkenTapered Roller76.212723.01102 kN1.16

Request a quotation for 748-S/742D

Send us the quantity you need and we will come back with price and lead time, normally within 24 hours. Equivalent parts from other brands can be quoted at the same time.

Online enquiry formrichard@bearingsfit.com