can someone help me with understanding how to graduate a cylinder from a smaller diameter at the bottom to a wider diameter at the top thanks.
MB3D
2
What 3d software are you using ? You can usually extrude at an angle to make the crossection go narrower or wider towards the top / bottom. Secondly most softwares support extrusion bewteen two surfaces, basically the software connects both crossections to create a 3d model. You would then have to design both the upper and lower crossection to create a model inbetween.
I’m using AutoCAD 2016 with a students license (also 30 days free trial available), AutoCAD 2016 and earlier versions support both operations that I explained above. Maybe the Autodesk freeware called 123D does support one or 2 of the methods, but I don’t know that for certain.
If you just need such a cone shaped object it would be a task of 60 seconds to make that for you. Just give me the lower and upper diameter and the height and I’ll upload the file here. As this is such a small task I won’t charge anything for that 
If you have sketchup - you can draw your larger diameter circle at the x,y,z vertices - select the circle tool, draw it out to any size, then type in the exact measurement in the info window. from there - use the push/pull tool and raise it to any length - type in a specific value you want, then grab just the top circle, select the scale tool and reduce to the percentage of the larger circle. that should be it
-Mark
Same theory for different cad programs, but just a different way of execution.
Sketchup - draw a circle, extrude to a cylinder, then scale the faces to desired side.
openSCAD - cylinder(x,y,z); y and z are the radiuses of the 2 faces, so just set them to whatever you want. X is length of cylinder.
Those are pretty much the only software I use, but you should be able to find the specific instructions for your program.
-Happy designing!
Sorry, I am using tinkercad, thanks for the help everyone, actually I found a community shape generator that was already set up to graduate a cylinder.
What cad program are you using?
tinkercad, i got it figured out thanks for the help 
