SIFT BEARING STORE CATALOG

231/750-B-K-MBFAGSpherical Roller

231/750-B-K-MB is a FAG spherical roller bearing, bore 750 mm, O.D. 1220 mm, width 365 mm. Dimensions, drawing, interchanges and price.

Tapered boreBrass cage
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Bore d750mm
Outside dia. D1220mm
Width B365mm
Dynamic Cr14100kN
Static C0r30500kN
Limiting speed445rpm
Weight1700kg
Cr / C0r0.46
Mean dia. dm985mm

Original catalogue drawing - FAG Schaeffler HR 1, page 742

231/750-B-K-MB FAG Spherical 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. D1220 mmBore d750 mmWidth B365 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 diameter75029.5276
DOutside diameter122048.0315
BInner-ring / bearing width36514.3701
rChamfer (min)9.50.374

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)750
Outside dia. D (mm)1220
Width B (mm)365
Inner-ring shoulder dia. D1 (mm)1

Load ratings & speeds

Basic dynamic load rating Cr (lbs)3169806
Basic static load rating Cor (lbs)6856673
Basic dynamic load rating Cr (N)1.41e+07
Basic static load rating C0r (N)3.05e+07
Fatigue limit load Cur (N)1.97e+06
Factor e0.29
Factor Y02.25
Limiting speed nG (rpm)445
Reference speed nB (rpm)189

Weight

Weight (kg)1700.0

Mounting dimensions (fillets / shoulders)

Housing fillet r max (mm)9.5
Shaft shoulder da (mm)790
Housing shoulder Da (mm)1180
Housing fillet ra max (mm)8

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 100 rpm
43,525,00010216,932
62,350,00039265,416
81,762,5001,024170,667
101,410,0002,154359,072
15940,0008,3231,387,244

Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 14,100,000 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.742 (dimensions)

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

Interchange - same dimensions, other brands

DesignationBrandTypedDB/TDyn. ratingkg
231/750CAME4NSKSpherical Roller75012203652,940,000 lbs1692.807

Same dimensions, same brand

DesignationBrandTypedDB/TDyn. ratingkg
231/750-B-MBFAGSpherical Roller750122036514100 kN1754

Series variants (different suffix)

DesignationBrandTypedDB/TDyn. ratingkg
231/1000-B-K-MBFAGSpherical Roller1000158046222000 kN3474
231/1000-B-MBFAGSpherical Roller1000158046222000 kN3474
231/500-BEA-XL-K-MB1FAGSpherical Roller5008302648300 kN574
231/500-BEA-XL-MB1FAGSpherical Roller5008302648300 kN593
231/530-BEA-XL-K-MB1FAGSpherical Roller5308702728900 kN634
231/530-BEA-XL-MB1FAGSpherical Roller5308702728900 kN655
231/560-BEA-XL-K-MB1FAGSpherical Roller5609202809700 kN731
231/560-BEA-XL-MB1FAGSpherical Roller5609202809700 kN754

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
230/750-K-MBFAGSpherical Roller75010902508500 kN786
230/750-MBFAGSpherical Roller75010902508500 kN806
232/750-B-K-MBFAGSpherical Roller750136047519300 kN3087
232/750-B-MBFAGSpherical Roller750136047519300 kN3136
238/750-B-K-MBFAGSpherical Roller7509201283000 kN180
238/750-B-MBFAGSpherical Roller7509201283000 kN186
239/750-K-MBFAGSpherical Roller75010001855200 kN394
239/750-MBFAGSpherical Roller75010001855200 kN426

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