However, with more and more items going to 3D printers the simplified geometry that has been used is no longer adequate so we need the accurate 3D geometry. Also, the spreadsheet allowed me to use this as a generic file and I only had to change DP, N, PA and a few other factors to easily make another gear.Ī lot of times gear teeth are like screw threads - you don't need accurate geometry, just the accurate information for them to be manufactured. The results were excellent for the metal prototyping I had done with the files. I trusted this over the involute curve function that SWX has, partly because I don't like how it stays blue when it should be fully constrained. In SolidWorks I used a spreadsheet (Design Table) to calculate 19 points for the smooth spline. I've have no experience in generating gears but if others can contribute I'm happy to manage the If the points are calculated accurately and if there are a good number of them and if they extend at least two points beyond the tooth boundaries then a normal spline is fine (so long as there are no deviation controls on the spline). The idea is that a user can simply copy the required part studio into your own document tweak a few variables and generate a gear of the required type. I'm looking for collaborators to create a series of parts studios for different gear types. Read this wikipedia article before you make any changes to the PA. You may also want to play with the Pressure Angle ( PA) (advanced use only) To change the fillet modify the variable TeethFillet Currently the fillet is set to 0.25 of the Gear Depth. The gear is also filleted but I regard the filleting as experimental.
GearDepth - Controls how thick the body of the gear will be.
SD - The diameter of the whole for the shaft OD - The outside diameter of the gear including the teeth Note: the model is defined in ISO millimeters. To generate a gear copy the gear parts studio into your own document using the onshape 'Paste Tab' feature.Ĭhange the few variables and you will have a gear to your requirements.
I've created a simple gear designer using onshape variables.
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