So my advice is to just model the gears minus the teeth (using, again, the pitch diameter). this can take some time on a middling machine). It is surely loads easier on your system (especially when you are placing/moving them. Inventor doesn’t care about the difference. Take the pitch diameter, and create a model of the gear (hub, bore, whatnot) but instead of teeth just make a cylinder with a diameter equal to the pitch diameter. I talked with some people about this question and what we decided is this: I’m looking at miter and bevel gears out of the Small Parts Inc catalog and pulling other bits of information out of my Machinery’s Handbook to try and make the gears on AutoCAD but it is a real pain.Īnyone know of an easier way to make gears? I understand how to make a standard spur type gear, but there are some that I can’t grasp. Īnywho, I’ve searched far and wide for another similar program but have come up with nothing. I found this but it’s only a 15 day trial then you have to pay. Then select the SPURGEAR.LSP program from where you stored the downloaded files.I’m looking for a freebie gear maker, most likely in a macro form. Use theĪppload facility by selecting Tools / Load Application. These values are updated so the spur gear data becomes that of the prior entries.ĭownload the SPURGEAR.LSP and SPURGEAR.DCL files and save them in AutoCAD's Support directory. The default first-session values are shown as 4" PCD, 12 teeth, and a 14.5-pressure angle. The program draws the gear in the image tile, showing the number of teeth for a quick reference. You supply the pitch diameter, number of teeth, and pressure angle using the Spurgear dialog box (figure 1). In response to requests, particularly from John Hurlburt, to update the routine for AutoCAD 2004/2005, I added a dialog box and corrected some compatibility problems to make SPURGEAR.LSP run in all versions of AutoCAD from 2000 onward. This month, I was spurred to return to a spur gear program that first appeared for AutoCAD Release 14.
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March 2023
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