SIFT BEARING STORE CATALOG

74550A/74850TimkenTapered Roller

74550A/74850 is a Timken tapered roller bearing, bore 139.7 mm, O.D. 215.9 mm, width 47.62 mm. Dimensions, drawing, interchanges and price.

Cone + cup assembly
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Bore d139.7mm
Outside dia. D215.9mm
Width B47.62mm
Dynamic Cr382kN
Static C0r614kN
Weight5.96kg
Cr / C0r0.62
Mean dia. dm177.8mm

Original catalogue drawing - Timken TRB Catalog, page 320

74550A/74850 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. D215.9 mmBore d139.7 mmWidth B47.62 mmCup width C34.92 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 diameter139.75.5
DOutside diameter215.98.5
BInner-ring / bearing width47.6251.875
TOverall assembly width47.6251.875
CCup / outer-ring width34.9251.375
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)139.700
Bore d (in)5.5000
Outside dia. D (mm)215.900
Outside dia. D (in)8.5000
Width B (mm)47.625
Overall width T (mm)47.625
Overall width T (in)1.8750
Cup width C (mm)34.925

Load ratings & speeds

Basic dynamic load rating Cr (lbs)85900
Basic static load rating Cor (lbs)138000
Basic dynamic load rating Cr (N)382000
Basic static load rating C0r (N)614000
Dynamic rating C1 (N, ISO)382000
Dynamic rating C1 (lbf, ISO)85900
Radial rating C90 (N)99000
Radial rating C90 (lbf)22300
Thrust rating Ca90 (N)82600
Thrust rating Ca90 (lbf)18600
Static rating C0 (N)614000
Static rating C0 (lbf)138000
Factor e0.49
Factor Y1.23
Factor K1.20
Geometry factor G1362.9
Geometry factor G268.5
Geometry factor Cg0.1338
Effective load centre a (mm)2.3

Weight

Weight (kg)5.96

Mounting dimensions (fillets / shoulders)

Shaft fillet R max (mm)6.4
Housing fillet r max (mm)3.3
Shaft shoulder da (mm)154.0
Shaft shoulder db (mm)166.0
Housing shoulder Da (mm)208.0
Housing shoulder Db (mm)196.0
Cage projection Aa (mm)4.8
Cage projection Ab (mm)2.0

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 500 rpm
495,5001023,386
663,66739213,083
847,7501,02434,133
1038,2002,15471,814
1525,4678,323277,449

Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 382,000 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.320 (dimensions)
Series typeTS

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

Same dimensions, same brand

DesignationBrandTypedDB/TDyn. ratingkg
74550/74850TimkenTapered Roller139.7215.947.62382 kN5.97

Series variants (different suffix)

DesignationBrandTypedDB/TDyn. ratingkg
74550A/74851CDTimkenTapered Roller139.7215.9106.36665 kN12.71

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
48680D/48620TimkenTapered Roller139.7200.0375.41499 kN8.13
73551/73875TimkenTapered Roller139.7222.2531.62293 kN4.29
73551/73876CDTimkenTapered Roller139.7222.2575.69510 kN9.36
74550/74845TimkenTapered Roller139.7214.9747.62382 kN5.86
74550/74850TimkenTapered Roller139.7215.947.62382 kN5.97
74550/74851CDTimkenTapered Roller139.7215.9106.36665 kN12.73
750550/751200TimkenTapered Roller139.7304.83.3--
82550/82931TimkenTapered Roller139.7236.543.5-9.87

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