SIFT BEARING STORE CATALOG

K1780-1729FAGTapered Roller

K1780-1729 is a FAG tapered roller bearing, bore 25.4 mm, O.D. 56.9 mm, width 19.84 mm. Dimensions, drawing, interchanges and price.

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Bore d25.4mm
Outside dia. D56.9mm
Width B19.84mm
Dynamic Cr43kN
Static C0r46.5kN
Limiting speed14,200rpm
Weight0.243kg
Cr / C0r0.92
Mean dia. dm41.1mm

Original catalogue drawing - FAG Schaeffler HR 1, page 614

K1780-1729 FAG 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 d25.4 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 diameter25.41
DOutside diameter56.8962.24
BInner-ring / bearing width19.8370.781
TOverall assembly width19.3680.7625
CCup / outer-ring width15.8750.625

Notes

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)25.4
Outside dia. D (mm)56.896
Width B (mm)19.837
Overall width T (mm)19.368
Cup width C (mm)15.875
Inner-ring OD d1 (mm)39.9

Load ratings & speeds

Basic dynamic load rating Cr (lbs)9667
Basic static load rating Cor (lbs)10454
Basic dynamic load rating Cr (N)43000
Basic static load rating C0r (N)46500
Basic dynamic axial rating Ca (N)2
Fatigue limit load Cur (N)5300
Factor e0.31
Factor Y1.95
Factor Y01.07
Limiting speed nG (rpm)14,200
Effective load centre a (mm)13

Weight

Weight (kg)0.243

Mounting dimensions (fillets / shoulders)

Chamfer r2 min (mm)0.8
Shaft shoulder da (mm)30
Shaft shoulder db (mm)30.5
Housing shoulder Da (mm)49
Housing shoulder Db (mm)51
Housing fillet ra max (mm)0.8
Fillet rb max (mm)1.3

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 3,000 rpm
410,750102564
67,1673922,181
85,3751,0245,689
104,3002,15411,969
152,8678,32346,241

Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 43,000 N. Hours = L10 x 106 / (60n). Life-modification factors for lubrication, contamination and temperature (aISO) are not included.

Source & traceability

BrandFAG
Source catalogueFAG / Schaeffler Rolling Bearings HR 1
Catalogue pagep.614 (dimensions)

Load ratings in newtons, fatigue limit load Cur, limiting speed nG and reference speed nB.

Interchange - same dimensions, other brands

DesignationBrandTypedDB/TDyn. ratingkg
1780/1729TimkenTapered Roller25.456.919.8445.4 kN0.23

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
KL44643-L44610FAGTapered Roller25.450.2914.7325 kN0.129
30205-AFAGTapered Roller25521532 kN0.155
30205-XLFAGTapered Roller25521538.5 kN0.154
30305-AFAGTapered Roller25621747 kN0.289
31305-AFAGTapered Roller25621737 kN0.297
32005-XFAGTapered Roller25471526 kN0.12
32005-X-XLFAGTapered Roller25471531.5 kN0.117
32205-AFAGTapered Roller25521839.5 kN0.186

Request a quotation for K1780-1729

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