A punch machine for A4 paper
1 plexiglass piece : 275 x 80 x 7 mm.
1 plexiglass piece : 30 x 15 x 7 mm.
1 aluminium ruler : 8 x 8 x 260 mm.
4 punch machines with 1 hole.
8 special heads screws : 5 x 20 mm.
8 nuts : 5 mm.
8 spring lock washers : 5 mm.
4 hexagonal heads screws : 4 x 10 mm.
4 spring lock washers : 4 mm.
1 hexagonal head screw : 3 x 30 mm.
1 small aluminium tube : 6 x 12 mm.
This assembly can appear a little obsolete, because we can find punch machines A4 quite cheap in supermarkets.
But if you love being an handyman and you find, at the bottom of a drawer, 4 punch machines with 1 hole (quite identical) and an old aluminium rule, then it is the moment to make yours.
To cut the plexiglass with a cutter and to drill it, go backwards (video rack), so that I won't ramble !
You'll draw with a point and on the hidden face of the base.
Once all your holes are done, present a punch removed from its plastic base (which collects confettis), locate the 4 mm holes.
Be careful : the nuts mustn't hamper the springs.
Before fixing them, drill 2,5 mm holes, then screw tap (3 mm) to prepare the fixing of the grip block : it will be at the same level as the principal base.
Make sure that the countersink screws are well in the thread and take care that you don't tighten them to much, if not you're likely to break the plexiglass.
Locate the holes on the ruler and then drill them (3,2 mm). But do not screw tap right now, because you'll need the ruler as a gauge to drill the levers.