SIFT BEARING STORE CATALOG

7908CNSKPrecision / Angular Contact

7908C is a NSK precision / angular contact bearing, bore 40 mm, O.D. 62 mm, width 12 mm. Dimensions, drawing, interchanges and price.

Request a quoteEmail usSearch the catalog
Bore d40mm
Outside dia. D62mm
Width B12mm
Dynamic Cr3,400lbs
Static C0r2,650lbs
Limiting speed22,600rpm
Weight0.109kg
Cr / C0r1.28
Mean dia. dm51mm

Original catalogue drawing - NSK catalogue, page 199

7908C 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. D62 mmBore d40 mmWidth B12 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 diameter401.5748
DOutside diameter622.4409
BInner-ring / bearing width120.4724

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)40
Bore d (in)1.5748
Outside dia. D (mm)62
Outside dia. D (in)2.4409
Width B (mm)12
Width B (in)0.4724

Load ratings & speeds

Basic dynamic load rating Cr (lbs)3400
Basic static load rating Cor (lbs)2650
Limiting speed - grease (rpm)22,600
Limiting speed - oil (rpm)34,400

Weight

Weight (kg)0.109

Mounting dimensions (fillets / shoulders)

Fillet ra (in)0.024
Fillet rb (in)0.012
Shaft shoulder da (in)1.772
Housing shoulder Da (in)2.244
Housing shoulder Db (in)2.343

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 3,000 rpm
43,78164356
62,5212161,200
81,8905122,844
101,5121,0005,556
151,0083,37518,750

Basic rating life per ISO 281: L10 = (C/P)3 with C = 15,124 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.201 (dimensions) / p.202 (ratings)

Dimensions in inches and millimetres, load ratings in lbs.

Interchange - same dimensions, other brands

DesignationBrandTypedDB/TDyn. ratingkg
61908FAGBall40621214.5 kN0.117
61908-2RSRFAGBall40621214.5 kN0.11
61908-2ZFAGBall40621214.5 kN0.11
B71908-C-T-P4SFAGPrecision / Angular Contact40621217.6 kN0.113
B71908-E-T-P4SFAGPrecision / Angular Contact40621216.6 kN0.113
HCB71908-C-T-P4SFAGPrecision / Angular Contact40621212.2 kN0.11
HCB71908-E-T-P4SFAGPrecision / Angular Contact40621211.4 kN0.11
HCS71908-C-T-P4SFAGPrecision / Angular Contact4062125 kN0.122
HCS71908-E-T-P4SFAGPrecision / Angular Contact4062124.8 kN0.122
HSS71908-C-T-P4SFAGPrecision / Angular Contact4062127.2 kN0.122

Same dimensions, same brand

DesignationBrandTypedDB/TDyn. ratingkg
6908NSKBall4062123,060 lbs0.109
7908A5NSKPrecision / Angular Contact4062123,220 lbs0.109

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
40BNC10NSKPrecision / Angular Contact4068153,120 lbs0.2
40BNC10SN24NSKPrecision / Angular Contact4068153,120 lbs0.2
40BNR10HNSKPrecision / Angular Contact4068152,380 lbs0.204
40BNR10SNSKPrecision / Angular Contact4068152,380 lbs0.204
40TAC72BNSKPrecision / Angular Contact407215--
40TAC90BNSKPrecision / Angular Contact409020--
5208NSKPrecision / Angular Contact408030.248.5 kN0.62
5208AZZNSKPrecision / Angular Contact408030.240 kN0.63

Request a quotation for 7908C

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.