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FCGear_InternalInvoluteGear.md

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GuiCommand
Name MenuLocation Workbenches Shortcut Version SeeAlso
FCGear InternalInvoluteGear
Gear , Internal Involute Gear
FCGear_Workbench
None
1.0
FCGear_InvoluteGear

FCGear InternalInvoluteGear

Description

Internal involute gears from left to right: Spur gearing, helical gearing, double helical gearing

Usage

  1. Switch to the FCGear Workbench.
  2. There are several ways to invoke the command:
    • Press the [ Internal Involute Gear button in the toolbar.
    • Select the Gear → [ Internal Involute Gear option from the menu.
  3. Change the gear parameter to the required conditions (see Properties).

Properties

An FCGear InternalInvoluteGear object is derived from a Part Feature object and inherits all its properties. It also has the following additional properties:

Data

{{Properties_Title|accuracy}}

  • numpoints|Integer: Default is {{value|6}}. Change of the involute profile. Changing the value can lead to unexpected results.

{{Properties_Title|base}}

  • height|Length: Default is {{value|5 mm}}. Value of the gear width.

  • module|Length: Default is {{value|1 mm}}. Module is the ratio of the reference diameter of the gear divided by the number of teeth (see Notes).

  • teeth|Integer: Default is {{value|15}}. Number of teeth (see Notes).

  • thickness|Length: Default is {{value|5 mm}}. Thickness of the uncut outer part of the gear.

{{Properties_Title|computed}}

  • angular_backlash|Angle: (read-only)

  • da|Length: (read-only) Inside diameter, measured at the addendum (the tip of the teeth).

  • df|Length: (read-only) Root diameter, measured at the foot of the teeth.

  • dw|Length: (read-only) Working pitch diameter.

  • outside_diameter|Length: (read-only) Outside diameter.

  • transverse_pitch|Length: (read-only) Pitch in the plane of rotation.

{{Properties_Title|fillets}}

  • head_fillet|Float: Default is {{value|0 mm}}.

  • root_fillet|Float: Default is {{value|0 mm}}.

{{Properties_Title|helical}}

  • beta|Angle: Default is {{value|0 °}}. With the helix angle β a helical gear is created -- positive value → rotation direction right, negative value → rotation direction left (see Notes).

  • double_helix|Bool: Default is {{false}}, {{true}} creates a double helix gear (see Notes).

  • properties_from_tool|Bool: Default is {{false}}. If {{true}} and beta is not zero, gear parameters are recomputed internally for the rotated gear.

{{Properties_Title|involute}}

  • pressure_angle|Angle: Default is {{value|20 °}} (see Notes).

  • shift|Float: Default is {{value|0}}. Generates a positive and negative profile shift (see Notes).

{{Properties_Title|precision}}

  • simple|Bool: Default is {{false}}, {{true}} generates a simplified display (without teeth and only a cylinder in pitch diameter).

{{Properties_Title|tolerance}}

  • backlash|Length: Default is {{value|0 mm}}. Backlash, also called lash or play, is the distance between the teeth at a gear pair.

  • clearance|Float: Default is {{value|0.25}} (see Notes).

  • head|Float: Default is {{value|-0.4 mm}}. This value is used to change the tooth height.

  • reversed_backlash|Bool: {{true}} backlash decrease or {{false}} (default) backlash increase (see Notes).

{{Properties_Title|version}}

  • version|String:

Notes

See FCGear InvoluteGear.

Useful formulas

See FCGear InvoluteGear.

Scripting

⏵ documentation index > Addons > FCGear > [External Command Reference](Category_External Command Reference.md) > FCGear InternalInvoluteGear