Internal Spur Gear Custom Sizing

[overkill4]

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


60% of the time, it works every time.

 

[CorBlimeyLimey]

Using what ... Toolbox, Gear Trax, your own design?

 

[overkill4]

Using Toolbox. I've copied the ANSI in standard so that I can add in some custom sizes but I'm not allowed to add sizes to the Pressure angle.

Geartrax is sounding better every day



60% of the time, it works every time.

 

[johnlayne]

You could also try MITCALC.

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.

http://www.mitcalc.com

John Layne

http://www.solidengineering.co.nz

 

[overkill4]

I had a look at that but I think it's a bit too advanced for my purposes. I just want to be able to input my major values and spit out a sketch or model. Basically I'm converting a ton of CAD drawings to SWorks, so I just want to input the same values that are shown when you insert a gear out of toolbox.

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.

 

[drawoh]

overkill4,

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

 

[overkill4]

Yah but I'm lazy. I want Solidworks to do the work.

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.

 

[drawoh]

overkill4,

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