SIFT BEARING STORE CATALOG

31305-AFAGTapered Roller

31305-A is a FAG tapered roller bearing, bore 25 mm, O.D. 62 mm, width 17 mm, dynamic rating 37 kN. Dimensions, drawing, interchanges and price.

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Bore d25mm
Outside dia. D62mm
Width B17mm
Dynamic Cr37kN
Static C0r38kN
Limiting speed12,000rpm
Weight0.297kg
Cr / C0r0.97
Mean dia. dm43.5mm

Original catalogue drawing - FAG Schaeffler HR 1, page 476

31305-A 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. D62 mmBore d25 mmWidth B17 mmCup width C13 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 diameter250.9843
DOutside diameter622.4409
BInner-ring / bearing width170.6693
TOverall assembly width18.250.7185
CCup / outer-ring width130.5118

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
Outside dia. D (mm)62
Width B (mm)17
Overall width T (mm)18.25
Cup width C (mm)13
Inner-ring OD d1 (mm)46.3

Load ratings & speeds

Basic dynamic load rating Cr (lbs)8318
Basic static load rating Cor (lbs)8543
Basic dynamic load rating Cr (N)37000
Basic static load rating C0r (N)38000
Basic dynamic axial rating Ca (N)3
Fatigue limit load Cur (N)4400
Factor e0.83
Factor Y0.73
Factor Y00.4
Limiting speed nG (rpm)12,000
Reference speed nB (rpm)8,700
Effective load centre a (mm)20

Weight

Weight (kg)0.297

Mounting dimensions (fillets / shoulders)

Chamfer r2 min (mm)1.5
Shaft shoulder da (mm)34
Shaft shoulder db (mm)32
Housing shoulder Da (mm)55
Housing shoulder Db (mm)59
Housing fillet ra max (mm)1.5
Fillet rb max (mm)1.5

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 3,000 rpm
49,250102564
66,1673922,181
84,6251,0245,689
103,7002,15411,969
152,4678,32346,241

Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 37,000 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.476 (dimensions)

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

Interchange - same dimensions, other brands

DesignationBrandTypedDB/TDyn. ratingkg
1305NSKBall2562174,050 lbs0.277
6305NSKBall2562174,630 lbs0.236
7305BNSKBall2562175,160 lbs0.245
BL305NSKBall2562175,720 lbs0.245
305NSKCylindrical Roller2562176,560 lbs0.24
NU305ENSKCylindrical Roller25621751 kN0.269
21305CDE4NSKSpherical Roller25621743 kN0.26
HR30305NSKTapered Roller25621758.5 kN0.27
HR30305CNSKTapered Roller2562179,440 lbs0.265
HR30305JNSKTapered Roller25621710,700 lbs0.268

Same dimensions, same brand

DesignationBrandTypedDB/TDyn. ratingkg
1305-K-TVH-C3FAGBall25621718.3 kN0.254
1305-TVHFAGBall25621718.3 kN0.258
6305FAGBall25621722.4 kN0.234
6305-2RSRFAGBall25621722.4 kN0.242
6305-2ZFAGBall25621722.4 kN0.24
6305-CFAGBall25621724.7 kN0.215
6305-C-2BRSFAGBall25621724.7 kN0.242
6305-C-2HRSFAGBall25621724.7 kN0.224

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
30205-AFAGTapered Roller25521532 kN0.155
30205-XLFAGTapered Roller25521538.5 kN0.154
30305-AFAGTapered Roller25621747 kN0.289
32005-XFAGTapered Roller25471526 kN0.12
32005-X-XLFAGTapered Roller25471531.5 kN0.117
32205-AFAGTapered Roller25521839.5 kN0.186
32205-B-XLFAGTapered Roller25521844.5 kN0.195
32205-XLFAGTapered Roller25521847.5 kN0.186

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