How to make this?

How to make this? what do you call it?



Thanks,

Simon

It's a PEM nut. PEM is actually the brand name of the company that makes them. A generic term for them is "Captive nut".
You drill a pilot hole into sheet metal than use a press to push them into the hole.

Thank you Ethan,
i found this called nut rivert gun :
http://www.ebay.com/itm/METRIC-HAND-NUT-RIVET-GUN-40-ALUMINUM-NUT-INSERTS-M3-M4-M5-AND-M6-FREE-SHIP-/271010063465?pt=LH_DefaultDomain_0&hash=item3f19756469

Is it can give the same solution?

A few points from my experience.....

Those nutserts might achieve the same thing for you, but they work more like a rivet and will be bulkier on the back side.

The plain smooth ones can easily end up spinning in the hole so don't over tighten your screw - the splined ones are a bit better.

I think the PEM's end up completely flush on one side (I might be wrong though). For nutserts to be completley flush on one side, the hole generally needs to be countersunk a little - so the material needs to be thick enough for this.

Have a look here to see how nutserts work...

http://www.avdel-global.com/en/products/threaded-inserts/thin-sheet-nutsertr.html

There are many different types and materials to choose from. you need to make sure they are good for the thickness of your material.

Oh, and be aware that the the mandrels on the tools for M3 and M4 can break easily, rendering the tool useless. The fact that they warn about it on the ebay page suggests that they must get a few complaints about it. They are often just heat treated (hardenend) socket head cap screws.

T

It's look very fun n easy with that avdel tool, but i think it's not economical when i only need for small project (1 or 2 rack enclosure). I don't know the price yet, but it's look like a pretty expensive tool.

I wonder if i can use electric drill instead of avdel  hydro pneumatic tool as insert tool.

Is there a cheaper and easier trick to do it?  :-[

The animations on that website use one of their expensive pneumatic tools, but it works the same way as your ebay one. I was just linking you to that so u can see 1: the principle of operation for nutserts, and 2: there are many different types, and 3: the difference of your ebay thing to the PEM's. I was not suggesting you get that pneumatic tool (which is about 2.5k). Avdel do do a handheld one, like the ebay one but better quality.

(no you can not use a drill)

Cheers,

T

Thank you T

You can solder standard nuts to sheet metal; you just need a powerful iron (about 100W) or even a small gas torch.
You can maintain the nut in place with a screw, just make sure solder doesn't get in the threads.

Good tip from Abbey. I have done it that way in the past.

Put the nut onto the screws, put the screw through the hole, and thighten it at the back with another nut. This will not only keep the nut dead in place but it will also eliminate the risk of solder creeping under.

I am just getting metalwork done for two products which feature 2.5mm nutserts into 0.7mm mild steel. Flush on the opposite side.

Would it be possible to mount PEM style nuts or blind threaded standoffs with a pin punch and a dead blow mallet?

I want to install PEM nuts in Par-Metal cases (luckily I ordered a bunch before the fire) to attach the face plates to the chassis with a screw instead of the handles that come with them. When the cases are packed it can be difficult to get the screw and nut in there. A PEM nut would make it much easier. I have taken the plunge and ordered an arbor press. I'm getting it to do neater hand stamp work. The press has a deep throat so I can do face plates. I'm worried that I might not be able to get the ram in such a tight spot. It might be easier to use a pin punch and a dead blow mallet if it will work.

Gold I think the hardest part will be keeping the punch level, but it should be possible with a good solid surface behind the work.

I would experiment on some scrap first.

gemini86 said:

I would experiment on some scrap first.

Click to expand...

Truer words were never spoken. I can clamp the work piece down. I could make an anvil out of bar stock if I need to support the whole piece. It might be tough to get the punch straight and flush and be able to whack it. The other thing I'm thinking of is mounting a piece of bar stock on the arbor press perpendicular to the ram, forming a T. Then slide the edge of the T in there, if I can mount it well enough.

I ordered this arbor press. http://www.mcmaster.com/#arbor-presses/=lmfbjk #3 under compact Arbor Press. The one with the deep throat. I plan on using this mount for the hand stamps. http://www.columbiamt.com/store/PressHolder.html  I already have the stamps. I've come to the conclusion that I will never be able to do a consistent and accurate job by hand. It's pricey but I like the way it looks and they will last forever. I also know there is no way I'm going to be able to learn engraving quickly. It looks hard.

I've used PEM, and made a tool for one of them, worked well in a vise from aluminium to Steel.

http://www.groupdiy.com/index.php?topic=47119.msg604234#msg604234


And if i was going to order a press, i would maybe go for something that will allow me to have more room for the metal sheet.
Something like this.      EDIT: yes like the one on MCmaster.

http://www.machinetoolcn.fr/big_img.html?etw_path=http://www.machinetoolcn.fr/2-6-2-bench-press.html&big_etw_img=2-sheet-metal-machinery/6-2-1b.jpg

BTW i don't think using a hammer with a punch will work good, they need a constant flat pressure to
be optimum.