This will work for hard to hold parts. 

Just watched a video  where the giuy had to machine a thin plate of aluminum,  He wanted to use a very wide set fly cutter  to clean up  a cut path several inches across.

As you can imagine the cutting forces in a large cut are substantial.

 

But it was Thin  so he couldn't squeeze it in a vice.

 

They clean the surfaces, using acetone,  dry them and apply blue tape to the mating surfaces.  Then the take a clean hunk of somethign round and burnish the blue tape pressing and rubbing it.

then they clean the tape and then apply  Locktight  pro super glue to one surface.

They squeeze them together a, lamp it let the glue set and  then  do the machining operation.

It Held~!!!!!!!!!!

 

here's the   vid.

 

Now that's really interesting, Thanks!

Sign carvers and other router users use the same technique for holding templates on the work. Most spray the mating surface with accelerator first. It works great and is easy to disassemble. Cheaper than double stick tape, too.

4 hours ago, Gene Howe said:

It works great

I was staggerblasted that it stood up to the forces of machining.  Metals require tons more force to work than wood.

Who’d a thunk it?