A Forstner bit drills flat bottom holes.
5/16 hole X 4 inch on a flat bottom hole: This will depend on the material, and tools available. Use a 1/8 bit, then 5/16. If you are not sure how deep the drill bit is in the hole, paint white out on the bit as your 4 inch mark so you can see it while the drill is spinning. If the material is metal, you will need coolant. To get the flat bottom: it wood, put a flat ended bolt into the hole and hammer, it will flatten the hole, it metal, forget about it, the hole is quite flat, and a pain in the butt to change. :-)
It depends on what is meant by "bottom part" - does this refer to the entire machine, or the drill bit? See the related link below for a labelled diagram of a pillar drill.
It is a type of flat vice that fits on the table of a drill press or vertical drill, so it will hold small items while drilling them.
A flat bottom flask would be an Ehrlemeyer flask, which is used quite a lot by chemists.anf
Flat Bottom Hull
the flat bottom i think
An abyssal plain is a flat area on the ocean bottom
It's a flat vice that clamps to the drill press table, to hold small items being drilled.
They are only flat at the bottom.
The top and bottom are normally flat.
B flat on the second line on the bass clef, E flat on the third space from the bottom, A flat on the first space from the bottom and the D flat on the middle line.
Drill a hole in the bottom.