CAD možnosti FreeCADu jsou založeny na jádře OpenCasCade. Modul Díl umožňuje FreeCADu přístup a používání objektů a funkcí OpenCasCade. OpenCascade je profesionální CAD jádro, jehož vlastnosti umožňují pokročilou manipulaci s 3D konstrukcemi a objekty. Objekty Díl, narozdíl od objektů Modulu Síť, jsou mnohem komplexnější a proto umožňují mnohem dokonalejší operace, jako jsou logické boolean operace, modifikace historie a parametrické chování.
The Part Workbench can also create objects that are not solids, such as faces, shells, and objects with only edges or vertices. It also provides a variety of general purpose tools for geometry manipulation, geometry validation, and making copies.
The 
PartDesign Workbench uses an alternative workflow for creating solids. For a detailed discussion of the Part Workbench versus the Part Design Workbench see Part and Part Design.
Box: Creates a box.
Cylinder: Creates a cylinder.
Sphere: Creates a sphere.
Cone: Creates a cone.
Torus: Creates a torus.
Tube: Creates a tube.
Create primitives...: A tool to create one of the following primitives:
Plane: Creates a plane.
Ellipsoid: Creates a ellipsoid.
Prism: Creates a prism.
Wedge: Creates a wedge.
Helix: Creates a helix.
Spiral: Creates a spiral.
Circle: Creates a circular arc.
Ellipse: Creates an elliptical arc.
Point: Creates a point.
Line: Creates a line.
Regular polygon: Creates a regular polygon.
Shape builder...: Creates shapes from various primitives.
Create sketch: Creates a new sketch and opens the Sketcher Dialog to edit it.
Extrude: Extrudes planar faces.
Revolve: Creates a solid by revolving an object (not a solid) around an axis.
Mirror: Mirrors the selected object across a mirror plane.
Scale: Scales one or more shapes. (v1.0)
Fillet: Fillets (rounds) edges of an object.
Chamfer: Chamfers edges of an object.
Make face from wires: Makes a face from a set of wires (contours).
Ruled Surface: Creates a ruled surface.
Loft: Lofts from one profile to another.
Sweep: Sweeps one or more profiles along a path.
Section: Creates a section by intersecting an object with a section plane.
Cross sections...: Creates one or more cross-sections through an object.
Offset:
- 3D Offset: Constructs a parallel shape at a certain distance from an original.
2D Offset: Constructs a parallel wire at certain distance from an original, or enlarges/shrinks a planar face.
Thickness: Hollows out a solid.
Projection on surface: Projects a logo, text or any face, wire or edge onto a surface.
Color per face: Assigns colors to individual faces of objects.
Compound:
- Make compound: Creates a compound from the selected objects.
Explode compound: Splits up compounds.
Compound Filter: Extracts the individual pieces from compounds.
Boolean: Performs boolean operations on two objects.
Cut: Cuts one object from another.
Union: Fuses two or more objects.
Intersection: Extracts the common part of two objects.
Join:
- Connect objects: Connects interiors of walled objects.
Embed object: Embeds a walled object into another walled object.
Cutout for object: Creates a cutout in a wall of an object for another walled object.
Split:
- Boolean fragments: Creates all pieces obtained from Boolean operations.
Slice apart: Slices and splits an object by intersecting it with other objects.
Slice to compound: Slices an object by intersecting it with other objects.
Boolean XOR: Removes space shared by an even number of objects.
Check geometry: Checks the geometry of selected objects for errors.
Defeaturing: Removes features from an object.
Import CAD file...: Imports from *.IGES, *.STEP, or *.BREP files.
Export CAD file...: Exports to *.IGES, *.STEP, or *.BREP files.
Box selection: Selects faces from a rectangular area.
Create shape from mesh: Creates shapes from mesh objects.
Create points object from geometry: Creates points objects from geometric objects.
Convert to solid: Creates solids from shape objects.
Reverse shapes: Creates parametric copies with reversed face normals from selected objects.
- Create a copy:
Create simple copy: Creates non-parametric copies of objects.
Create transformed copy: Creates non-parametric copies of objects. It is intended for objects nested in containers.
Create shape element copy: Creates non-parametric copies of subelements: vertices, edges and faces.
Refine shape: Creates parametric copies with a refined shape from selected objects. It removes unnecessary edges from planar and cylindrical faces.
Attachment...: Attaches an object to one or more other objects.
The 
Std Measure tool replaces the tools listed below. (v1.0)
Measure Linear: Creates a linear measurement. Not available in (v1.0) .
Measure Angular: Creates an angular measurement. Not available in (v1.0) .
Measure Refresh: Updates all measurements. Not available in (v1.0) .
Clear All and View Measure Clear All: Clears all measurements. Not available in (v1.0) .
Toggle All and View Measure Toggle All: Shows or hides all measurements. Not available in (v1.0) .
Toggle 3D: Shows or hides 3D measurements. Not available in (v1.0) .
Toggle Delta: Shows or hides delta measurements. Not available in (v1.0) .
Preferences: Preferences for the Part Workbench.
Import Export Preferences: Preferences for importing from and exporting to different file formats.- Fine-tuning: Some extra parameters to fine-tune Part behavior.
See Part scripting.
- Import from STL or OBJ: How to import STL/OBJ files in FreeCAD
- Export to STL or OBJ: How to export STL/OBJ files from FreeCAD
- Whiffle Ball tutorial: How to use the Part Workbench
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