Roller Sprocket Properties dialog box

Set up properties of a toothed sprocket.

Note: This dialog box is displayed only if you select the roller chain sprocket.

Access:

Ribbon: Design tab Power Transmission panel Roller Chains and click the Design tab. On the Sprockets group box, click Sprockets Properties.

To more precisely control dimensions and properties of sprocket for analysis, double-click the sprocket within the preview, or click within the dialog box.
The transmission requires a minimum of 2 toothed sprockets. All others can be flat idlers.
Design Guide	Controls the size of the idler based on a diameter specified, or appropriate transmission ratio. Select the Diameter option to retain the sprocket size when you change the size of the driver sprocket. If you select the Transmission Ratio option, you cannot enter the sprocket size value. It is determined by size of driver sprocket and transmission ratio. If you change the size of the driver sprocket, the size of this driven sprocket changes as well.
Custom size	Customizes dimensional parameters of the sprocket such as tooth gap shape properties, or sprocket hub size. By default, the sprocket size values are set according to the chain standard (data tables are stored within the ...\Design Data\Design Accelerator\Tables\Chains\RollerChains folder). If you select the Custom Size option, you are responsible for all sprockets' properties.
Custom number of strands	Overrides number of strands adopted from a chain by default. Number of strands of the sprocket can be bigger than number of strands of the chain. You can select active strand which is used for the chain. Note: To set active strand, select the blue grip within Autodesk Inventor window.
	Motion clockwise/ Motion counterclockwise Changes the motion direction. When you have a design with 2 sprockets drive, select this option to change the direction of the chain motion. When you have a design with multiple sprockets drive, select this option to change motion just for the given sprocket.
Power ratio	Power ratio magnitude range is from 0.0 to 1.0, depending on the amount of power that is distributed by a given sprocket. If more than 2 sprockets are within the chain drive, some sprockets can act also as idlers or power can split into more driven sprockets in some ratio. If the power ratio is 0.0, the generator considers it an Idler. The first sprocket (driveR) always has 100% power so the power ratio value is 1.0.
Inertia moment	An important value for calculation of natural frequencies of the chain drive. If the Vibration analysis option is selected within the Calculation tab then the inertia moments of toothed sprockets cannot have a zero value. The moment of inertia is considered not for a sprocket itself but for entire rotating mass that holds with the sprocket.
	Theoretical tooth form Generates sprocket with theoretical form of the tooth gap for specified number of teeth. See the Geometry design properties chapter within the Engineer's Handbook for more information. ISO tooth form Generates sprocket with idealized ISO form of the tooth gap for specified number of teeth. See the Geometry design properties chapter within the Engineer's Handbook for more information.
Dimensions	Modify the sprocket dimensions.