spirals

Im a total noob when it comes to this, how do i make spiral grooves on a cylinder?

Draw a helix and a cylinder -booth with the same radius and with parallel axes.

Welcome in the forum!

still stuck with this. i need to make the grooves indented with a 1/4 turn down the cylinder. i got the helix on there but cant figure out what to do next.

Are you trying to make a threaded part?

im trying to design a bb for airsoft, that has rifling on the bb

The projectile or the barrel?

Draw a helix and a cylinder -booth with the same radius and with parallel axes.

Welcome in the forum!

To add to fuccaro's post. You'll probably want to sweep some profile and subtract it from your cylinder like a this circle profile.

KC

kencaz - thats exactly what im trying to make but just with a straighter helix.

i dont mean to be a pain in the butt or anything, but could i get a walk through on how to get that onto a cylinder?

kencaz - thats exactly what im trying to make but just with a straighter helix.

i dont mean to be a pain in the butt or anything, but could i get a walk through on how to get that onto a cylinder?

Like Fuccaro had stated, draw a cylinder the radius and height you want and then create a helix with the same base and top diameter as your cylinder. You can specify how many turns your helix has so try 1.

After you have your cylinder and helix surrounding it, created a profile, (such as a circle), who's radius equals the depth of cut you want on the cylinder.

Use the 'SWEEP' command choosing the circle as your object and the helix as the sweep path. This will create a tube around the cylinder that you will use to cut your groove.

Now use 'SUBTRACT' choosing the cylinder first then the helical tube to create the final rifled cylinder.

Hope this helps

KC

but could i get a walk through on how to get that onto a cylinder?

See the tutorials in my signature.