drawing a bolt

[Elektryk]

im having trouble drawind a 3d solid bolt.....

its 5/16 thick 3/4in long and .5 in head and a nut on it....
and i also have a bearing on that bolt..
the bearing is 1/4 thick outside is 7/8 and inside is 5/16

can anyone help?

[Elektryk]

plzzzzz

[iskalipsi]

go here
http://www.cadtutor.net/forum/showth...t=bolt+drawing

[SuperCAD]

Or better yet:

http://www.cadtutor.net/forum/showth...t=screw+thread

There is a flaw with Ellen's video. The threads are not perpendicular to the root body. She missed the step where you have to align the thread profile with the helix.

What are you drawing that requires a threaded bolt? Speaking from experience, it's almost a waste of time to go to this level of detail. If you're like me and just want to see if you can do it, then have at it. If not, then I wouldn't as there are simpler ways to show a threaded part.

[JD Mather]

Or better yet:

http://www.cadtutor.net/forum/showth...t=screw+thread

There is a flaw with Ellen's video. The threads are not perpendicular to the root body. She missed the step where you have to align the thread profile with the helix.

I haven't looked at the video yet, but if you are referring to using the align option of Sweep, that would be incorrect.
If you chase a thread on a lathe with a single point tool the top face of the 60° toll remains parallel to the floor, that it, it does not continuously align perpendicular to the helix spline.

http://home.pct.edu/~jmather/content...torial%204.pdf

PS: OK I loooked through the video and the threadform does not look like any thread I have seen before. Didn't take the time to check where it went wrong.

[Tankman]

plzzzzz

3D, wow! Why not ask the manufacturer for some 3D *.dwg files?

[SuperCAD]

PS: OK I loooked through the video and the threadform does not look like any thread I have seen before. Didn't take the time to check where it went wrong.

I've done the same thread and I know that something is missing from her method. It's either align or base point, because my threads have turned out wrong when I didn't use those options. She wasn't making a particular threadform in that video. I've seen the step by step method and she got it right on that one. She just screwed up (no pun intended) in the video.

[Elektryk]

Or better yet:

http://www.cadtutor.net/forum/showth...t=screw+thread

There is a flaw with Ellen's video. The threads are not perpendicular to the root body. She missed the step where you have to align the thread profile with the helix.

What are you drawing that requires a threaded bolt? Speaking from experience, it's almost a waste of time to go to this level of detail. If you're like me and just want to see if you can do it, then have at it. If not, then I wouldn't as there are simpler ways to show a threaded part.

actually no it does't have to be threaded... all i need is to show just the tip of the bolt and then the nut and the bearing on it... maybe i could get away without the thread but then again im having trouble drawing the nut the head and the bearing... the bearing i dont even know where to start ;(

[kencaz]

I've done the same thread and I know that something is missing from her method. It's either align or base point, because my threads have turned out wrong when I didn't use those options. She wasn't making a particular threadform in that video. I've seen the step by step method and she got it right on that one. She just screwed up (no pun intended) in the video.

I agree the vid is flawed... The profile is swept incorrectly and also you always remove material never add. Cut threads are just that... Cut.

KC

[kencaz]

actually no it does't have to be threaded... all i need is to show just the tip of the bolt and then the nut and the bearing on it... maybe i could get away without the thread but then again im having trouble drawing the nut the head and the bearing... the bearing i dont even know where to start ;(

You don't have to use helical threads just to show them. You can use a straight revolved profile and it looks pretty much the same. You can do it in 2D or 3D.

thread.JPG

For the bearing I would revolve the profile or cross section around an axis, (X in the picture), at the desired radius. You can do this for the inside and outside profiles. Then just polar array some spheres and you have a bearing.

bearing.jpg

KC