SIFT BEARING STORE CATALOG

NN3940NSKPrecision / Angular Contact

NN3940 is a NSK precision / angular contact bearing, bore 200 mm, O.D. 280 mm, width 60 mm. Dimensions, drawing, interchanges and price.

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Bore d200mm
Outside dia. D280mm
Width B60mm
Dynamic Cr93,500lbs
Static C0r184,000lbs
Limiting speed3,000rpm
Weight10.478kg
Cr / C0r0.51
Mean dia. dm240mm

Original catalogue drawing - NSK catalogue, page 223

NN3940 NSK Precision / Angular Contact 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. D280 mmBore d200 mmWidth B60 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 diameter2007.874
DOutside diameter28011.0236
BInner-ring / bearing width602.3622

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)200
Bore d (in)7.8740
Outside dia. D (mm)280
Outside dia. D (in)11.0236
Width B (mm)60
Width B (in)2.3622

Load ratings & speeds

Basic dynamic load rating Cr (lbs)93500
Basic static load rating Cor (lbs)184000
Limiting speed - grease (rpm)3,000
Limiting speed - oil (rpm)3,400

Weight

Weight (kg)10.478

Mounting dimensions (fillets / shoulders)

Fillet ra (in)0.0787
Shaft shoulder da min (in)10.5906
Shaft shoulder da (in)8.3071
Housing shoulder Db (in)10.2756

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 1,000 rpm
4103,977641,067
669,3182163,600
851,9895128,533
1041,5911,00016,667
1527,7273,37556,250

Basic rating life per ISO 281: L10 = (C/P)3 with C = 415,909 N. Hours = L10 x 106 / (60n). Life-modification factors for lubrication, contamination and temperature (aISO) are not included.

Source & traceability

BrandNSK
Source catalogueNSK inch product catalogue
Catalogue pagep.225 (dimensions) / p.226 (ratings)

Dimensions in inches and millimetres, load ratings in lbs.

Interchange - same dimensions, other brands

DesignationBrandTypedDB/TDyn. ratingkg
23940-S-K-MBFAGSpherical Roller20028060550 kN11.5
23940-S-MBFAGSpherical Roller20028060550 kN11.8

Same dimensions, same brand

DesignationBrandTypedDB/TDyn. ratingkg
23940CAME4NSKSpherical Roller20028060128,000 lbs10.868

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
7040NSKPrecision / Angular Contact20031051264 kN13.7
7040A5NSKPrecision / Angular Contact2003105148,300 lbs13.703
7040CNSKPrecision / Angular Contact2003105159,500 lbs13.503
7240NSKPrecision / Angular Contact20036058370 kN26.5
7240A5NSKPrecision / Angular Contact2003605878,300 lbs26.404
7240CNSKPrecision / Angular Contact2003605882,700 lbs26.204
7340NSKPrecision / Angular Contact20042080520 kN54.4
7940A5NSKPrecision / Angular Contact2002803840,100 lbs6.922

Request a quotation for NN3940

Send us the quantity you need and we will come back with price and lead time, normally within 24 hours. Equivalent parts from other brands can be quoted at the same time.