SIFT BEARING STORE CATALOG

1779/1729TimkenTapered Roller

1779/1729 is a Timken tapered roller bearing, bore 23.81 mm, O.D. 56.9 mm, width 19.84 mm. Dimensions, drawing, interchanges and price.

Cone + cup assembly
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Bore d23.81mm
Outside dia. D56.9mm
Width B19.84mm
Dynamic Cr45.4kN
Static C0r45.3kN
Weight0.24kg
Cr / C0r1
Mean dia. dm40.4mm

Original catalogue drawing - Timken TRB Catalog, page 94

1779/1729 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. D56.9 mmBore d23.81 mmWidth B19.84 mmCup width C15.88 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 diameter23.8120.9375
DOutside diameter56.8962.24
BInner-ring / bearing width19.8370.781
TOverall assembly width19.3680.7625
CCup / outer-ring width15.8750.625
rChamfer (min)1.30.0512

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)23.812
Bore d (in)0.9375
Outside dia. D (mm)56.896
Outside dia. D (in)2.2400
Width B (mm)19.837
Overall width T (mm)19.368
Overall width T (in)0.7625
Cup width C (mm)15.875

Load ratings & speeds

Basic dynamic load rating Cr (lbs)10200
Basic static load rating Cor (lbs)10200
Basic dynamic load rating Cr (N)45400
Basic static load rating C0r (N)45300
Dynamic rating C1 (N, ISO)45400
Dynamic rating C1 (lbf, ISO)10200
Radial rating C90 (N)11800
Radial rating C90 (lbf)2650
Thrust rating Ca90 (N)6200
Thrust rating Ca90 (lbf)1390
Static rating C0 (N)45300
Static rating C0 (lbf)10200
Factor e0.31
Factor Y1.95
Factor K1.90
Geometry factor G110.6
Geometry factor G25.4
Geometry factor Cg0.0521
Effective load centre a (mm)-6.9

Weight

Weight (kg)0.24

Mounting dimensions (fillets / shoulders)

Shaft fillet R max (mm)0.8
Housing fillet r max (mm)1.3
Shaft shoulder da (mm)28.5
Shaft shoulder db (mm)29.5
Housing shoulder Da (mm)51.0
Housing shoulder Db (mm)49.0
Cage projection Aa (mm)1.8
Cage projection Ab (mm)0.4

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 500 rpm
411,3501023,386
67,56739213,083
85,6751,02434,133
104,5402,15471,814
153,0278,323277,449

Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 45,400 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.94 (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
1779/1730TimkenTapered Roller23.8153.9819.8445.4 kN0.21

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
07093/07196TimkenTapered Roller23.8150.0114.2629.1 kN0.12
07093/07204TimkenTapered Roller23.8151.9914.2629.1 kN0.15
07093/07210XTimkenTapered Roller23.8150.814.2629.1 kN0.14
12CA/13CTimkenTapered Roller23.8149.2311.15-0.11
15574A/15520TimkenTapered Roller23.8157.1518.65-0.23
1751/1729TimkenTapered Roller23.8156.923.81--
1990X/1920TimkenTapered Roller23.8156.921.34-0.26
23092/23250XTimkenTapered Roller23.8163.521.69--

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