The tooth profiles should be normal to the helix angle. The cross-section is the gear wheel profile. Use command “FlowAlongSrf” to wrap the line on the “paper strip” (Rhino calls it the “base surface”), back around the cylinder.Įxecute command “Sweep 2 Rails” – one curve is the axial centreline, the other curve is the tooth-point line you drew. Actually, you only need to draw one of them. Use “UnrollSrf” command on the cylinder to make the “strip of paper”, which will presently be wrapped again around the cylinder.ĭraw onto the “paper strip” the lines of the tooth points at the correct bevel angle.
Mitch above suggested a simple twist of one end of a straight-extruded gear with respect to the other would suffice. This one asks if there’s a tutorial for creating a helical gear in Rhino.
It’s my day for reviving ancient threads.