SIFT BEARING STORE CATALOG

1203NSKBall

1203 is a NSK ball bearing, bore 17 mm, O.D. 40 mm, width 12 mm, dynamic rating 1,800 lbs. Dimensions, drawing, interchanges and price.

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Bore d17mm
Outside dia. D40mm
Width B12mm
Dynamic Cr1,800lbs
Static C0r596lbs
Limiting speed18,000rpm
Weight0.073kg
Cr / C0r3.02
Mean dia. dm28.5mm

Original catalogue drawing - NSK catalogue, page 27

1203 NSK Ball 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. D40 mmBore d17 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 diameter170.6693
DOutside diameter401.5748
BInner-ring / bearing width120.4724
rChamfer (min)0.610.024

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)17
Bore d (in)0.6693
Outside dia. D (mm)40
Outside dia. D (in)1.5748
Width B (mm)12
Width B (in)0.4724

Load ratings & speeds

Basic dynamic load rating Cr (lbs)1800
Basic static load rating Cor (lbs)596
Limiting speed - grease (rpm)18,000
Limiting speed - oil (rpm)22,000

Weight

Weight (kg)0.073

Mounting dimensions (fillets / shoulders)

Chamfer r (in)0.024
Shaft shoulder da min (in)0.827
Housing shoulder Da max (in)1.418

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 3,000 rpm
42,00264356
61,3342161,200
81,0015122,844
108011,0005,556
155343,37518,750

Basic rating life per ISO 281: L10 = (C/P)3 with C = 8,007 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.29 (dimensions) / p.30 (ratings)

Dimensions in inches and millimetres, load ratings in lbs.

Interchange - same dimensions, other brands

DesignationBrandTypedDB/TDyn. ratingkg
1203-TVHFAGBall1740128.1 kN0.073
6203FAGBall1740129.5 kN0.065
6203-2RSRFAGBall1740129.5 kN0.067
6203-2ZFAGBall1740129.5 kN0.067
6203-CFAGBall17401210.4 kN0.062
6203-C-2BRSFAGBall17401210.4 kN0.065
6203-C-2HRSFAGBall17401210.4 kN0.067
6203-C-2ZFAGBall17401210.4 kN0.067
S6203FAGBall1740129.5 kN0.065
S6203-2RSRFAGBall1740129.5 kN0.067

Same dimensions, same brand

DesignationBrandTypedDB/TDyn. ratingkg
6203NSKBall1740122,150 lbs0.064
7203BNSKBall1740122,090 lbs0.068
HR30203NSKTapered Roller17401224.8 kN0.079
HR30203JNSKTapered Roller1740124,520 lbs0.077
7203NSKPrecision / Angular Contact17401211.9 kN0.067
7203A5NSKPrecision / Angular Contact1740122,360 lbs0.064
7203CNSKPrecision / Angular Contact1740122,450 lbs0.064

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
1303NSKBall1747142,810 lbs0.136
16003NSKBall173586.6 kN0.033
2203NSKBall1740162,200 lbs0.086
2303NSKBall1747193,210 lbs0.177
3203JNSKBall174017.52,880 lbs0.104
3303JNSKBall174722.24,520 lbs0.191
5203JNSKBall174017.53,290 lbs0.091
5203TNGNSKBall174017.53,280 lbs0.086

Request a quotation for 1203

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.