Solidworks and some gear stuff

What you'll have to do is Sweep a Shape along a Path to create 1 groove or tooth. After that, you should be able to use the Circular Pattern option to create the rest of your gear.

After you cut the 1st tooth, select that feature in your Feature Manager, then apply a Circular Pattern to it. I have worked with a lot of ball-screws and other similar items, some with multiple leads, and this works fairly easily.

hey there thanks for the immediate reply
let me put it this way
When I just sketch a groove or a tooth and apply circular pattern the last tooth does not fit with the first tooth.Sometimes it makes a space between them sometimes they just collide...
I would be grateful if you just explain me as if you are explaining to a guy who has a negative IQ(Hey that did not make any differences did it?...)

Hum, so you are saying that the spacing from the first and last tooth/groove are not equal? It's simple math then... just take 360 degrees and divide by the nuimber of teeth/grooves you have. That number wil be what you use to generate your circular pattern spacing.

Percusse,

1) Make a circle to your major or minor diameter and exit your sketch.

2) Pick your sketch that you just made and go to the curves toolbar and pick helix.

3) Decide your pitch and revolution or pick the combo box the choose a different method on defining your helix. I start my helix out at 0.0.

4) Then either define a new plane perpendicular to your helix (or curve), or just use the top plane (note: this will not be mathematically correct, but it will work) to define a new sketch of a tooth or groove.

5) Then as Mad Mango pointed out do a sweep function (whether it be boss or cut) using your new sketch and your path.

6) After some tweaking you will get it to work I'm sure.

But if you want this to be even easier, go to This guy makes some software for making worm gears, spur gears, helical gears, bevel gears, and sprockets. There are more I think, but that's a good majority of them. The software costs about $250, last time I checked. He also has software for making cams.

Hope that helps ,
Scott Baugh, CSWP
Scott Baugh, CSWP
George Koch Sons,LLC
Evansville, IN 47714
sjb@kochllc.com