Blind Tap
Blind Tap
(OP)
What would be an easily achieveable minumum plate thickness to create an M8 blind tapped hole?
This is purely for holding down some plastic and non structural counter sunk screws.
Would 10mm plate be too thin for this to be achieved without great difficulty?
DW
This is purely for holding down some plastic and non structural counter sunk screws.
Would 10mm plate be too thin for this to be achieved without great difficulty?
DW





RE: Blind Tap
Do the parts need to be removable or is permanent mounting an option. To attach metal serial number plates and other small items I have used metal tacks from Amtack Fasteners. Quick and easy and no drilling.
http://www.amtakfasteners.com/
RE: Blind Tap
You don't want the hole to break through, right? Take away 2 mm to be safe.
Drill bits are pointy. Take away say 3 mm that you can't tap.
Countersunk? Another 3 mm.
That leaves you with 2 mm of useable hole depth for tapping.
M8 is 1.5 pitch. Leaves you with a bit over 1 thread. Not too much.
So, I would hazard to guess that 10 mm plate is too thin.
RE: Blind Tap
Your best bet would be to use a self tapping or thread forming screw?
RE: Blind Tap
RE: Blind Tap
Pretty much confirmed my thoughts.
Yates, the plate is structural steel.
I would prefer to drill through also but the plate makes up a welded structure enclosing a sealed empty void (imagine a hollow steel cube). By drilling through, this would perhaps allow corrosion to occur inside the unpainted void if for some reason a fastener (that would normally plug the hole) was accidently left out.
DW