Connectors

Connectors are used to encapsulate the geometry, force capacity, or other information associated with connectors and fasteners that are part of the interaction between parts.

Bearing

bearing( Identifier, Units, Bearing Factor, Bore Diameter, Outside Diameter, Width, Fillet Radius, Catalog Capacity, Contact Angle )
Returns
<bearing> Creates a bearing with the specified dimensions and properties.
Identifier
<string> A string identifying the bearing to be returned.
Units
<string> "metric" or "SAE".
Bearing Factor
<curve> A curve mapping the thrust/radial load ratio to a factor for the type of bearing.
Bore Diameter
<number> A positive number for the bore diameter of the bearing.
Outside Diameter
<number> A positive number for the outside diameter of the bearing.
Width
<number> A positive number for the width of the bearing.
Fillet Radius
<number> A positive number for the fillet radius of the bearing.
Catalog Capacity
<number> The capacity of the bearing in pounds. The catalog capacity is based on 3000 hours B-10 life at 500 RPM.
Contact Angle
<number> ( 0 )> (Optional) The contact angle of the bearing in degrees.
bearingConn( Bearings, Fatigue Life, RPM )
Returns
<bearing> Searches Catalog for the bearing specified by Identifier and returns a copy of the bearing if found.
Identifier
<string> A string identifying the bearing to be returned.
Catalog
<array> An array of bearings.
lookupBearing( Identifier, Catalog )
Returns
<bearing> Searches Catalog for the bearing specified by Identifier and returns a copy of the bearing if found.
Identifier
<string> A string identifying the bearing to be returned.
Catalog
<array> An array of bearings.
bearingDesign( VerticalForce, HorizontalForce, RPM, LifeInMillions, InnerDiameter, LoadFactor )
Returns
<group of numbers> Requires a minimum of five parameters, the sixth parameter is optional.Returns a single row deep groove ball bearing suggested for use from the SKF bearing company catalog along with other geometrical dimensions and parameters.

 
VerticalForce
<number> The vertical component of the reaction acting on the bearing in Newtons 'N'.
HorizontalForce
<number> The horizontal component of the reaction acting on the bearing in Newtons 'N'.
RPM
<number> Speed of rotation of the shaft on which the bearing is seated in revolutions per minute
LifeInMillions
<number> While selecting the proper bearing, it is necessary to specify the expected life in millions of revolutions for the bearing with repect to the given application. This can be determined by the user based on experience and some values for typical applications are tabulated below.

Wheel Applications

Life( million revolutions)

Automobile Cars

50

Trucks

100

Trolley Cars

500

Rail-Road Cars

1000


Also if you know life in number of hours, The life in millions of revolutions is computed as: LifeInMillions = ( 60 * RPM * LifeInHours )/1000000
Suggested values for life in hours for some typical applications are tabulated below.

(i)Machines used intermittently such as lifting tackle, hand tools and house hold appliances

4000 - 8000 hr

(ii) Machines used for eight hours of service per day, such as electric motors and gear drives

12 000 - 20 000 hr

(iii)Machines used for continuous operation( 24 hr per day) such as pumps, compressors and conveyers.

40 000-60 000 hr

InnerDiameter
<number> The diameter of the shaft on which the bearing is to be seated in mm. The available bearings in this SKF catalog have inner diameters in the range of 10mm. to 190mm.
LoadFactor
<number> This factor takes into consideration the effect of dynamic load. It is an optional parameter and some values are tabulated below based on the type of drives for the system.

Type of drives

Load Factor

(A) Gear Drives:

(i) Rotating machines free from impact like electric motors and turbo-compressors

(ii) Reciprocating machines like internal combustion engines and compressors

(iii) Impact machines like hammer mills

 

1.2-1.4

1.4-1.7

2.5-3.5

(B) Belt Drives:

(i) V-Belts

(ii) Single-ply leather belt

(iii) Double ply leather belt

 

2.0

3.0

3.5

(C) Chain Drives:

1.5

bearingSkf( BearingWidth, InnerDia, OuterDia, InnerRaceOD, OuterRaceID, BallDia, Fillet, Chamfer )

  Returns
<group> Creates a bearing with required parameters. Requires
1.a minimum of first three parameters and rest optional or
2.output of the "bearingDesign" constructor.
example- bDesign : bearingDesign(500.0, 500.0, 4000, 50, 60.0, 2.0);
                 bShow : bearingSkf( bDesign );
If mentioning InnerRaceOD dimension, also give OuterRaceID dimension. These two parameters are available to the designer to take the gear/shaft or housing shoulder diameter into consideration during assembly modeling.The resultant bearing is located centrally about the origin.

 


 

BearingWidth(B.W.)
<number> A positive number for width of the bearing in mm.
InnerDia.(I.D.)
<number> A positive number for the inner/bore diameter of the bearing in mm.
OuterDia.(O.D.)
<number> A positive number for the outer diameter of the bearing in mm.
InnerRaceOD(I.R.O.D.)
<number> A positive number for the inner race outer diameter of the bearing in mm.
OuterRaceID(O.R.I.D.)
<number> A positive number for the outer race inner diameter of the bearing in mm.
BallDia.(B.D.)
<number> A positive number for the ball diameter of the bearing in mm.
Fillet
<number> A positive number for fillet for the ball bearing races in mm.
Chamfer
<number> A positive number for chamfer for the ball bearing races in mm.

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