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Variable Radius Surface Fillet

G3 Fillet Between Surfaces

  Fillet Type  

Constant Radius:  Use this option to create fillets with a constant radius
Constant Distant:  Use this option to create chamfers
Variable Radius:  Use this option to create fillets with a variable radius

Trim Type
The Trim Type option determines how the fillet result will be trimmed back to join the two surfaces.  This really defines the
outer curves for the fillets.  See images below.

  Trims back to the shortest intersection edge between the two surfaces
None:  No trimming
Maximal:  Trim to the furthest extrapolation curve where the two surfaces intersect
Bevel:  The transition will be a linear connection between the two surfaces
Blend:  The transition between the surfaces will be blended

Minimal Trim Option

Maximal Trim Option

Bevel Trim Option


Blend Trim Option


Cross Section

Circular:  Circular arc
Approximate Circular:  fixed chamfer distance
G1 Blend:  Blended G1 continuity fillet
G2 Blend:  Blended G2 continuity fillet
G3 Blend:
  Blended G3 continuity fillet



Medium:  Uses 5 digits of accuracy for the shelling operation
Low:  Uses 4 digits of accuracy
High:  Uses 6 digits of accuracy
Very Low:  Uses 3 digits of accuracy
Very High:  Uses 7 digits of accuracy



Hide:  Hides the original object from the display and shows only the fillet result
Show:  Show the original object (along with the resulting fillet)
Delete:  Delete the original object
Change Layer:  Put the original object on a different layer
Lock:  Freeze the original object from future editing



Radius:  The fillet radius or chamfer distance


Blend Scale

Blend Scale:  Scale factor that determines the rate of blending convergence.  The smaller the value, the more gradual the change
and the smoother transition between the faces participating in the fillet.


Variable Radius
Variable radius fillets are defined using pairs of values.  Each pair of values consists of a distance value (in percent terms), and a radius value.  These pairs are listed in the Variable Radius Fillet Panel.  You can select one of these values in the Variable Radius Fillet Panel to edit it.

Add Pair:
  Explodes the assembly into its individual parts.  It will explode the assembly based on the selected option (see below).
Remove Pair:  Delete a pair of variable radius values %:  Percentage distance along the edge for locating the fillet.  For example, 0 = the starting point of the edge, 50 = the middle, and 100 = the endpoint.
Rad:  Radius of the fillet at the specified point
Reverse:  Reverse the order of the fillet definition pairs (so the first pair becomes the last, and the last pair becomes the first)
Remove:  Delete the selected fillet pair
Blend Int:  Perform a blended interpolation