Internal Spur Gear Custom Sizing
Internal Spur Gear Custom Sizing
(OP)
I'm trying to set up a custom size for a spur gear and I'm not able to change the Pressure Angle.
Any thoughts why this is?
Thanks
Any thoughts why this is?
Thanks
60% of the time, it works every time.






RE: Internal Spur Gear Custom Sizing
RE: Internal Spur Gear Custom Sizing
Geartrax is sounding better every day
60% of the time, it works every time.
RE: Internal Spur Gear Custom Sizing
The best $250 I ever spent on Engineering calc software. The full version has a plugin for SolidWorks and will generate 3d models via an excel spreadsheet.
It's $250 for a lifetime licence or you can licence an individual module for a year at about $33 US.
www.mitcalc.com
John Layne
www.solidengineering.co.nz
RE: Internal Spur Gear Custom Sizing
mitcalc seemed to force me to go through the entire gear/pinion design. Am I wrong about that? Is there a simple method to creating gears with mitcalc?
Thanks
60% of the time, it works every time.
RE: Internal Spur Gear Custom Sizing
How good does your model have to be?
Are you going to use it generate production tooling, or is it just for generating 2D drawings? If your gears are machined, there is no need for your model to have perfect geometry.
Several books on gears provide instructions on how to draw gear teeth. My 1941 edition of Engineering Drawing, by Thomas E. French for example, has instructions on drawing spur gears, which should be adequate, as long as you do not send the model out for rapid prototyping. Search the second hand bookstores, if you want to save money.
JHG
RE: Internal Spur Gear Custom Sizing
All I'm looking for is cosmetic representation that is easy to modify. I'll settle for adding threaded textures then rotating 90degrees.
Thanks for all the replies.
60% of the time, it works every time.
RE: Internal Spur Gear Custom Sizing
In that case, if it is large gear, straight sides should do the trick. For smaller gears, you have to carefully place a radius. You can use a design table to control the geometry, and provide information to your design notes, and your subsequent BOM entry. In other words, you can design a 10DP, 50tooth gear, and make the model, the drawing, the drawing notes, and the part description parametric.
JHG