WTB 1/2" diameter sheet metal punch outs

[Cranky]

Need 12 minimum but I'll take more. .060 to .125" thick will work but if they are a little thicker will be fine too but the diameter needs to be pretty close.

 

[YY1]

Can you use electrical box knockouts?

 

[Cranky]

IIRC, the knockouts are not standard sizes....?

 

[khryslerkid]

Makes the cleanest hole! Lowe's ext should have them or a electrical supply house...

 

[snakeyes]

try a machine shop some times they have slugs laying around and will give them to ,that is what you want are the slugs ?

 

[khryslerkid]

try a machine shop some times they have slugs laying around and will give them to ,that is what you want are the slugs ?

Or they can easily make some for you. Punch press or lathe.

Just reread the thread. The electrical knock outs won't work for a slug because of the hole in them...

 

[YY1]

The ones on pressed 4" boxes don't have holes, and they are within a tolerance of uniform size.

Might be a bit too thick though, although IIRC the tolerance on thickness is greater than diameter of holes, so you might could sift through and find a couple thin ones.

Also, breaker panels are thinner gauge metal than 4" boxes.

You might ask an electrical contractor if they have any or could save some from their next panel box job.

Should we assume you're looking to patch body panels?

 

[Ron Ward]

Ummm... just gonna throw this out there.

IF you can't find a place locally that has a turret punch (think: industrial sheetmetal fabrication) then you could always cut down a 1/2" diameter steel bar with a bandsaw. The bar is readily available from places like Tractor Supply or Ace Hardware.

 

[YY1]

...of course those knockouts I've been talking about are for 1/2" ID pipe, so they're probably more like 5/8".

 

[Cranky]

I can make them since I have a small machine shop but man, figured I could find some from a sheet metal shop somewhere and living just outside of Houston, you would think that wouldn't be too hard to do but so far, no dice and I've been looking around. Cutting some bar stock will work but hate to cut up what I have left....

 

[zyzzyx]

I have a "Precision Brand Products " hole punch set and I think I can punch
.060 material. What do you want to do with these little buggers anyway?

How many do you want total, and by when?

 

[YY1]

Is the manufacturing stress on a bar gonna work for you?

I might tend to think those slices would be brittle.

 

[Cranky]

I have a "Precision Brand Products " hole punch set and I think I can punch
.060 material. What do you want to do with these little buggers anyway?

How many do you want total, and by when?

I have 10 holes to fill but a couple of extra ones are always good. The car has been sitting for several years now so there's no rush but my plan is to start hitting it hard when the weather starts to turn cooler (usually around late October) plus I have several other projects that I'm trying to get out of the way so there's more room to work. Thought about just taking a piece of copper as a back drop and MIG welding the holes but plugs would be easier and would be less work.

Is the manufacturing stress on a bar gonna work for you?

I might tend to think those slices would be brittle.

1020 bar stock. I don't have much left tho plus it's 1 1/2" diameter. When I was working still, I'd bring home scrap pieces whenever it built up and someone cleaned off the 'surplus' rack and put it all in the dumpster.

 

[zyzzyx]

O.K., I have fifteen of them punched. send me your mailing address and I'll mail them to you.

 

[Cranky]

O.K., I have fifteen of them punched. send me your mailing address and I'll mail them to you.View attachment 211206View attachment 211207

Got them today and they are perfect for what I need!!! Thanks again and if there's anything you need, just say so and I'll help if I can!

 

[moparmarks]

Just so ya all know 1/2" electrical conduit takes a 7/8" hole. 3/4" takes a 1-1/8" hole.