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I know this post is old, but I was just browsing and came back across you response. Coincidentally my wife named our dog Ratchet...

Any one of four ways (excluding casting cause that's what the jewlers use).
1) radius attachment (also commonly referred to as a ball turning attachment)
2) grind the fillet shape into a piece of...

I definitely agree with their opinions, reinforcements will transmit the vibration through the machine. This is especially the case if the reinforcements are touching each other or touching anything...

I'll second the Shigley book.

I have a friend who pots very tiny EDM'd specimens in epoxy for holding them while performing his experiments. He has the same trouble with the epoxy boiling during degassing. What he does is pull...

CCBC is just a few minutes away from you in Catonsville. They have a full program and a really nice shop setup:

http://www.ccbcmd.edu/ceed/spring/at_manufacturing.html

I'm going to look at it in person on Tueday. What's the best way to tell if the screw and barrel are worn (ie, should there be a certain maximum clearance between the two?).

They are basically...

I might be purchasing a used machine locally. It's 30 years old, but they said it still runs fine and they are replacing it with a machine that has a larger shot size.

The machine is no longer...

If vibration is needed to remove trapped air bubbles, speakers will indeed work very well. I recently visited a company that used speakers to test large metal parts in order to find their resonant...

I've used several different water soluble oils, so far I've only found one that gave me problems, Rustlick 50/50. If it gets on my skin and sits there for a few seconds before I can wipe it off, I...

If you weren't going to be competing with me for business I would. I've got a line of products in development at the moment.

You really need those digitized? The shocker trigger in your first picture is something I reverse engineered pretty close to exact w/ a pair of calipers in all of 10 minutes.

P.S. - It's nice to...

Ah, yeah, I missed it. It seems like it would work to me. A friend and I threw some large sized garnet in some slow cure resin. We're going to let it cure for a week. I'll post the results. I...

Has anyone considered using Garnet (SiO4) instead of granite (SiO2)?

Here's the deal: It's an abrasive used for waterjet cutting, costs $.25 a pound, and has sharp corners. However, after the...

I don't have pictures of mine, but it's much beefier and larger than the sherline. A good site to look for pictures would be cartertools.com

What precision level are those bearings rated at? I'm just curious as to what sort of accuracy you are shooting for.

It would be nice if you added a feature that estimated the fastener pullout strength.

IE you put in the shear modulus of the material, the thread being used, and length of thread engaged, and it...

I got some hands on experience using manual machines at school, and went from there. I'm still by no means proficient with cnc, but I know enough to build machines and get by making simple parts.
...

I live in Baltimore. I'm very busy, but if you get in touch with me I could always give you my advice as far as motion control and machine building goes.

John

The standard is to tolerance drawings for machining.

Then for anodizing, discuss tolerances with the anodizer. Anodizer doesn't need or care about drawings, the only information they need is the...

The power supply can range anywhere from 12-24v. Hook the power supply up where the 24v pin is. Using a 12v supply there is perfectly fine. The reason it says 24v is because that is the maximum...

Nice project, looking forward to seeing the rest.

What are you doing for your spindle? Ball bearings? Plain bearings? Load ratings and speeds?

I've been wanting to make my own lathe, just...

I've dealt a lot with Martin Sprocket through our mini-baja team at school. If they don't have what you need, they will more than happily make it for you (at a cost comparible to their standard...

There's a lab here that does some waterjet cutting. If you can send a .dxf file to [email protected], he could talk to the appropriate person and get you a quote.

Shielded cable should only be grounded at one end. Normally you ground it on the controller side, though I'm not sure of the exact reason.

each machine has it's own programming language. The post file is what tells mastercam or other CAM software exactly how to work with your machine's programming language.

When you go to generate...

If someone had enough time to put together a MD area get together during the holidays, I'd go. I haven't been able to find any real machinist clubs either. The only sort of club I've ran into have...

It's nice to see someone else from MD on these boards!

The cathode doesn't have to be lead. If you make it from aluminum it will slowly dissolve away and you might have to change your acid more frequently due to the amount of dissolved aluminum in the...

Nope, that was definitely the wrong link, I corrected it right away but you were too fast for me.