How to fix a Toroidal inside 1U without screw under ?

[hugo]

Hi all,
After some rackings, i observe that screws under the enclosure can damage other enclosures when it is placed on the rack...So i would like if somebody have the solution to have a clean bottom of on 1U gssl project. The toroidal is not so big, maybe i can use Super Glue or patex ?...or is it too bad, to insecure ?..
Thanks a lot

 

[Script]

Uses screw but flush underside here:
http://groupdiy.com/index.php?topic=33192.0

Stay away from glue.

 

[pucho812]

make it countersunk, and use a countersunk screw.... Then it will be flush with the chassis....

 

[Matt Nolan]

Make sure that whatever you do the screw doesn't make electrical contact with the top of the enclosure. You don't want the metal case to become a shorting turn on the torroid.

 

[hugo]

Make sure that whatever you do the screw doesn't make electrical contact with the top of the enclosure. You don't want the metal case to become a shorting turn on the torroid.

the bottom of screw always makes contact with the case...and all sides , top, front, are connected to the bottom...i do not see why it is a problem..

 

[Matt Nolan]

Make sure that whatever you do the screw doesn't make electrical contact with the top of the enclosure. You don't want the metal case to become a shorting turn on the torroid.

the bottom of screw always makes contact with the case...and all sides , top, front, are connected to the bottom...i do not see why it is a problem..

The problem is if it makes contact with the case at the top *and* at the bottom.

 

[hugo]

Make sure that whatever you do the screw doesn't make electrical contact with the top of the enclosure. You don't want the metal case to become a shorting turn on the torroid.

the bottom of screw always makes contact with the case...and all sides , top, front, are connected to the bottom...i do not see why it is a problem..

The problem is if it makes contact with the case at the top *and* at the bottom.

Ok thanks,

cheers,

 

[Audio1Man]

Try to use another way to mount / secure the Toroid. I have used in several products. Use a clamp type as in my sketch. Add top filler if needed. This will not make a shorted turn.
Duke.

 

[Rocinante]

Ive used an assortment of zip ties that go through the sides and back to relatively good success. 
You can also get a punch and using the reverse side knock the metal inward forming a metal 'mound' inside the case. Then drill your hole and return to  punching the mound till your screw sits flush with the bottom of the case. 

 

[abbey road d enfer]

Hi all,
After some rackings, i observe that screws under the enclosure can damage other enclosures when it is placed on the rack...So i would like if somebody have the solution to have a clean bottom of on 1U gssl project. The toroidal is not so big, maybe i can use Super Glue or patex ?...or is it too bad, to insecure ?..
Thanks a lot

The soultion I've used for years on thousands of products: put the xfmr on a pice of soft plastic (thicker than alimentary film) on a flat surface, fill the hole with Bondo . When dry, it is ready for small c'sunk self-tapping screws.

 

[rob_gould]

Here's a great solution from a member here :

http://groupdiy.com/index.php?topic=46037

 

[gswan]

The toroid mounting screw can be quite large, even to countersink the bottom of the case.
My preference for this is to mount the toroid onto a 3mm  or so plate of aluminium, countersinking the toroid screw and then use small (m3) countersunk screws to mount the plate to the chassis. If it's a small PSU module that is being powered I'll often put this onto the plate as well, which makes it an entire subassembly.

An example here, shows the subassembly.
https://axtsystems.com/joomla31/index.php/projects/12-cat-psu-modules/38-art-psu12

 

[Script]

I really like the idea of a complete subassembly (TX & PSU). Might be difficult though in a 1U case (height).

 

[ungifted]

My 5cents

 

[warpie]

My 5cents

Not very DIY friendly though 

 

[gyraf]

..can't use a press-in, unless it's pressed from outside - weight of transformer would make it unsafe..

Jakob E.

 

[gswan]

I really like the idea of a complete subassembly (TX & PSU). Might be difficult though in a 1U case (height).

I guess it depends on the dimensions of the components being used, which are not specified.
The PSU should be easy to fit, and if the transformer is a low profile version (eg 30mm) then it should not be difficult.