Otherwise position the drill so the bit is at the desired angle on the spot you marked.
How to drill a hole in plastic sheet.
With out using a drill you can make a hole in most plastics.
Also always reduce the drill speed as the drill bit exits the material.
When drilling plastic the larger the hole the slower drill speed you should use since high speeds can melt the plastic.
The speed of the drill must be reduced to supply gentle continuous pressure to the plastic material.
The pilot hole should be at least 1 2 the diameter of the final hole.
Place your plexiglass sheet on top of a piece of scrap plexiglass one that is already ruined or a piece of medium density fiberboard mdf this will make it less likely that you will chip the back of the board or scratch it when the drill bit goes through.
Step 2 adjust the drill press speed to between 350 and 1750 revolutions per minute or rpms.
5 clamp both sheets to a secure surface.
If you d rather purchase the plastic drill bit you need simply visit your favorite hardware store or shop online for the greatest variety and information.
Quick way to make a long hole in plastic using a torch.
Before you embark on drilling the main hole you should consider starting with a pilot hole.
This way the drill bit enters the plywood when it exits the plastic and avoids chipping the surface on the bottom.
Insert the correctly sized high speed drill bit into a drill press chuck.
Select the drill bit that matches the size hole you want to drill.
When you start the drilling process ensure that the hole is away from the edge of the plexiglass.
Set the drill to its slowest setting if it has a variable knob.
For example to drill a 1 2 inch hole you can make a pilot hole by beginning with a 1 4 bit drill and then moving to a 1 2 bit drill.
Small flats must be ground on each side of the edges that will cut into the plastic.
Depress the trigger as lightly as possible and drill a hole very slowly through the plastic.