ONLINECADTOOLS - online tools for engineering and sheet metal work

ONLINECADTOOLS - Great online tools for engineering, piping ventilation and general sheet metal work

... "Each tool provides a form with fields in which you set your dimensions.
The answer is a script (".scr" file that you can open in AutoCAD using the "script" command) or a "DXF" file that is read directly by CAD editors. In most cases, you also get a table with the coordinates of the points on which you can manually draw the corresponding line (for example, on paper or sheet metal)."... 

http://www.onlinecadtools.com/myindex_en.HTM

SHEET METAL:
http://www.onlinecadtools.com/english/html/sheet_metal/index.HTM

         Segment Bend ( Elbow, Knees ):

         Cylindrical 

         Conical type 1 

         Conical type 2 

    

         Square to Round 

  Tee Piece ( T-Junctions ) 

  Tee of 3 pipes with equal diameters

  Saddle Tee 

 

  Simple breeches piece 

  Round Trouser Piece 

   

     Cylinder and plane 

 

  Reducer - Equal and Offset ( Cone and plane )  

  Reducing cone with non-parallel circular foreheads 

  Reducing cone with parallel circular foreheads

  Reducing straight circular cone   (

 

  Screw or helicoid surface (auger, screw conoid)

    

         Spherical segment

         Sphere by meridians

GEARS:

http://www.onlinecadtools.com/english/html/index_gears.HTM

Modular involute  Gears

Involute Internal Splines 

Involute External Splines 

Measurement: Straight external teeths by measuring with rollers or spheres

Chain gears ( Sprockets )

PLANE CURVED LINES:  

http://www.onlinecadtools.com/english/html/index_curves.HTM

Involute curve according to initial and final angle parameter

Involute curve according to initial and final radius vector 

Archimedes spiral according to initial and final angle parameter 

Archimedes spiral according to initial and final radius vector

Parabola