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KOYO / Extra-small, miniature ball bearings / standard type / open

KOYO ML1204

Deep groove ball bearings technical reference with manufacturer-sourced dimensions, characteristics and engineering resources.

Technical data available
Bore diameterd
1.2 mm
Outside diameterD
4 mm
WidthB
1.8 mm
Dynamic load ratingC
0.14 kN
Static load ratingC0
0.03 kN
Limiting speednG
120000 r/min

Use this page as a technical reference. Verify the current manufacturer specification and the complete application requirements before selection.

Technical data

Product specifications

Metric and imperial values are paired where the manufacturer provides both. Expand a section to review its parameters.

Core specifications10 parameters
Core specifications
ParameterSymbolValue
Variant / constructionExtra-small, miniature ball bearings / Standard type / Open
Bore diameterd1.2 mm
Outside diameterD4 mm
WidthB1.8 mm
Basic dynamic load ratingC0.14 kN
Basic static load ratingC00.03 kN
Fatigue load limitPu0.0009 kN
Limiting speednG120000 r/min
Mass≈m0 kg
SealingOpen
Manufacturer Identity2 parameters
Manufacturer Identity
ParameterSymbolValue
BrandKOYO
Official Class Key010-020-010
Classification2 parameters
Classification
ParameterSymbolValue
Official Category PathDeep groove ball bearings - Extra-small, miniature ball bearings - Standard type - Open
Official Classification 1Deep groove ball bearings / Extra-small, miniature ball bearings / Standard type / Open
Technical Data14 parameters
Technical Data
ParameterSymbolValue
d1.2 mm
D4 mm
B1.8 mm
R(Min.)0.08 mm
Basic Load Ratings : Cr0.140 kN
Basic Load Ratings : C0R0.03 kN
Fatigue Load Limit : Cu0.0009 kN
Factor : F011.4
Limiting Speeds(Grease Lub.)120000 min-1
Limiting Speeds(Oil Lub.)140000 min-1
Da(Min.)1.8 mm
Da(Max.)3.4 mm
Ra(Max.)0.07 mm
Mass(Refer.)0.1 g

Technical documents & data sheet

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Record identity
KOYO ML1204
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