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Yeah, I get the feeling the machine will yell at me if it can't take it. I'll do a test cut when I get back to my shop, and I'll report back with the results. Thanks for the advice you guys. It's invaluable.

I've got a pretty tight 10" Atlas. It does seem to be more rigid that some of the SB lathes I've used. The shaft is RC 60, but I think only case hardened.

Well, I do have plenty of excess shaft, and inserts are cheap, so I guess that's a good idea. I'll throw science at it and see what happens.

Hi all, I'm making an arbor that needs to run in some needle bearings, and has a profile turned on one end. I have some hardened shaft of the proper size, and was wondering if there's any reason I couldn't cut it in my lathe with carbide tooling. Will I break something horribly? I've cut a...

And a quick update. Here's the video from the Chicago race. http://vimeo.com/47237915 We took 2nd place in the road race, won the moxie for the weekend, and ended up in 5th place overall for the series. I'm pretty stoked, and now that it's over, I can start working on the car for the October...

Awesome. I've always thought that those people were a little nuts. Then I started this. Most of the teams that race are from hackerspaces (communal workshops). After I joined my local hackerspace (Pumping Station: One in Chicago) I just joined because it looked like fun. And because the...

Here's a video from our most recent race in Detroit. We finished 8th. http://vimeo.com/46605204

Hi all, I've been gone a while, but I've been busy. I'm involved in the power racing series (PPPRS). We take kid-sized ride-on toys, re-build them, and race them (the goal being to have a good time more than win). It's been an excellent test of my fabricating skills, and now that the season...

I've not heard of them before, but the price certainly looks good! I would be interested as well in finding out if they're valid DROs.

Looks great! When do we get to see it working?

Hi all, When I got my camera, one of the things I liked about it was that it can shoot video at up to 1000 frames/sec. So of course, I film a lot in slow-motion. Today I was boring out some bearing mounts on my mill, and thought it would be fun to film it, so here it is...

You have mid-size steppers and no use for them? Sounds like someone needs a CNC project...

Looking good from here. Although brass may be pretty, you can use whatever you have in the right size for the flywheel.

Glad to hear everything is working now. I can't wait to see this working!

I'm assuming the delay is in milliseconds? Things to check: Are the leads wired correctly? Is the separate motor voltage connected to the driver, and does it share a common ground with the controller? What is the current pot set at? Upload the code, maybe it's something subtle there.

Nothing to be ashamed of there, that looks amazing! Keep up that momentum!

I'd go for the motor with more steps/rev and more torque. You'll get smoother, (and more importantly) faster motion.

Thank you all for your replies. I've found a larger lathe that I can use to machine it, but will bear in mind some of the suggestions from this thread for future reference.

I've used these motors before, and they're really quite nice. http://www.phidgets.com/products.php?category=23&product_id=3302_0 Bogs brings up a good point about torque, and these will probably be inadequate for machining. I would recommend a NEMA 23 sized motor with some more "oomph", maybe...

Thank you all so much for your replies. What I actually need to do is cut off 6", face the end, turn down 2.75" to 3/4" diameter, and thread it 3/4 - 16. Jason -- I like your idea of using the boring head, but the one I have can only go do a depth of 1.8" with the boring bars I have. I will bear...