ANSI 25 Sprockets in CAD

[generalbrando]

I've searched around with no success. I'm looking for ANSI 25 sprockets in cad. We're looking at ANSI 25 roller chain for next year and if we can get CAD drawings we might be able to get aluminum sprockets made when build time comes (yeah, I'm ahead of myself, I know). Thanks

[Jack Jones]

There's a few here: Sprockets

If what you want isn't there, let me know how many teeth - hubbed/hubless - finished/plain bore and I'll model a few for you.

[Swampdude]

They can also be found on www.cadregister.com
in the partspec section look up sprockets, then Berg as the manufacturer
then the ansi 25's are also refered to as 1/4 pitch
you'll get a 2d face profile with a couple teeth that you'll need to array at the needed teeth.

[sanddrag]

There's one here http://www.cbliss.com/inventor/Parts.htm I don't know if they have the size you need but it is worth a try.

[generalbrando]

Thanks, your replies have been helpful. If anyone finds more, send them my way.

I'm no good at CAD/Inventor (yet) so I'm wondering how difficult it would be to use one of these to CNC Mill a flat stock of 1/8" aluminum into a sprocket that would attach to a hub. I want to do it that way so we don't have to spend $$$ on inch thick aluminum that's just going to get shreded. Is it possible to output the CAD design to a CNC Mill program?

[Jack Jones]

Originally Posted by generalbrando

Thanks, your replies have been helpful. If anyone finds more, send them my way.

I'm no good at CAD/Inventor (yet) so I'm wondering how difficult it would be to use one of these to CNC Mill a flat stock of 1/8" aluminum into a sprocket that would attach to a hub. I want to do it that way so we don't have to spend $$$ on inch thick aluminum that's just going to get shreded. Is it possible to output the CAD design to a CNC Mill program?

I'd recommend you water cut them. All you need is as input is a .dxf line drawing.

Also, #25 chain has a 1/8" roller width, so 1/8" Al is a little too thick; it's likely to bind.

[generalbrando]

I'm not sure if we have access to water cutting, and if so how easily they'd let us use it. That's a great thought though, I'll have to look into it. So that I don't sound like a babbling fool (hard to achieve) what would I call the machinery? Water-Cut-O-Matic 5000? That'd be great. In other words, will they understand when I say water cutting? Thanks

1/8" would be just fine I believe. All that is needed is to put it on a lathe and add a small pitch, right? We did this with sprockets we had made last year.

Incase last year's sprockets make you wonder: they were ANSI 35 for starters and we had the kits drawings I believe. Also, it was done as a last minute favor by a large machine shop on campus and if I'm not mistaken, they did it all by hand (i.e. not water cutting or CNC Milling). It took them over a week working full time to make 5 sprockets, so I'd really like to be more efficient

[sanddrag]

There is also the option of laser cutting. Also, a water cutter is often referred to as water jet.

[cmaccoy]

Originally Posted by generalbrando

I've searched around with no success. I'm looking for ANSI 25 sprockets in cad. We're looking at ANSI 25 roller chain for next year and if we can get CAD drawings we might be able to get aluminum sprockets made when build time comes (yeah, I'm ahead of myself, I know). Thanks

Do you actually have any Cad/cam software? I'm good with MasterCam. And if you actually have that...........i can help you...