Step-drill/getrapte boor

This equipment is safety category 6: Other equipment with no limits.

This equipment is Noise Category 3: Can be used at all hours. No limits.

For drilling hole in sheet material. Also see the Large HSS drills and Grote Gaten Zaag - Large Hole Saw.

Keep the speed low (50% or less of normal speed).

Location

One box in the wood shop; several sets in the metal shop.

See also

The Wood Drills and Mechanics Drill bit, Korte Boren, DIN1897