Preview dialog box

On the Dimensions tab, displays the schematic image of spur gears dimensions. Use other tabs to show profile of mesh, pinion, and gear teeth.

Access:

Ribbon: Design tab Power Transmission panel Spur Gear and on the Design tab, click Preview... in the Common area.

Dimensions

Displays the schematic image of the spur gears dimensions.

Click Gear 1, Gear 2 commands to see appropriate calculated results.

Check the box to insert the dimension between wires value.

Results

Results pane shows the calculated values for either gear 1 or gear 2.

You can change the input values in the Design and Calculate tabs. Values are calculated when you click Calculate.

The units of the results values can be changed. Double-click the specified value you want to change and units are automatically converted to desired units.

Following output parameters are displayed in the Results pane:

Note: For description of the calculated parameters in the Results area, see Engineer's Handbook.

• Base Circular Pitch (p _tb )
• Circular Pitch (p)
• Tangential Circular Pitch (p _t )
• Tangential Pressure Angle (α _t )
• Operating Pressure Angle (α _w )
• Tangential Operating Pressure Angle (α _tw )
• Pitch Diameter (d)
• Base Circle Diameter (d _b )
• Root Diameter (d _f )
• Chordal Dimension W
• Chordal Dimension Teeth (z _W )
• Dimension Over (Between) Wires (M)
• Chordal Thickness (t _c )
• Chordal Addendum (a _c )

Teeth mesh

Displays actual teeth mesh of the pinion and gear. Available for external and internal teeth. The geometry is based on values specified in the Design and Calculation tabs. Click Calculate to update the preview.

The blue dotted line represents the base circle.

The red dash dot line represents the pitch diameter circle or axis.

Line of action is highlighted in blue.

	Zoom All	Switch on to display entire gear set, or switch off to display teeth mesh.
	Step Backward, Step Forward	Rotates gear by one step in a given direction.
	Animation Backward, Animation Forward	Plays the animation of the teeth mesh in given direction.

Pinion and rack mesh

Displays actual mesh of the pinion and gear rack. Available for external teeth only. The picture can give a better understanding of how the tooth profile is produced. The geometry is computed based on values specified in the Design and Calculation tabs. Click Calculate to update the preview.

The blue dotted line represents the base circle.

The red dash dot line represents the pitch diameter circle or axis.

	Zoom All	Switch on to display entire gear set, or switch off to display teeth mesh.
	Step Backward, Step Forward	Rotates gear by one step in a given direction.
	Animation Backward, Animation Forward	Plays the animation of the teeth mesh in given direction.

Gear and rack mesh

Displays actual mesh of the gear and gear rack. Available for external teeth only. The picture can give a better understanding of how the tooth profile is produced. The geometry is computed based on values specified in the Design and Calculation tabs. Click Calculate to update the preview.

The blue dotted line represents the base circle.

The red dash dot line represents the pitch diameter circle or axis.

	Zoom All	Switch on to display entire gear set, or switch off to display teeth mesh.
	Step Backward, Step Forward	Rotates gear by one step in a given direction.
	Animation Backward, Animation Forward	Plays the animation of the teeth mesh in given direction.