Stepped drill for confirmation screws

Stepped drill bits for pre-drilling for confirmats (furniture screws) in wood, chipboard, plywood.
With these drill bits, you pre-drill a hole for a confirmat screw, which is used to screw together furniture made mainly of chipboard. This screw has a threaded part, then a part serving as a pin and a head. The confirmat drill bit has three steps and thus creates a stepped hole for the threaded part, for the pin part and a countersink for the screw head. Recommended speed: 1,000 - 1,500 rpm. For drilling in hard and soft wood and chipboard.

A drill bit for confirmat screws is a special tool designed to pre-drill holes for confirmat screws, which are often used in furniture and joinery. This drill usually combines several functions in one tool:
1. Center drill - a smaller diameter for drilling the center of the hole.
2. Main drill - corresponding to the diameter of the confirmat screw shank.
3. Countersink - for countersinking the screw head into the material.

Which drill bit to choose?
- Drill bit diameter - Usually, drill bits with a diameter of 4.5 mm to 5 mm are used for the body of the screw and 7 mm to 10 mm for countersinking the head.
- Drill bit material - Most often HSS (high-speed steel) or carbide drill bits for longer life.
- Shank type - Can be straight or hexagonal for clamping in cordless drills.

What is a confirmat?
A confirmat is the most commonly used screw for joining furniture, especially from agglomerated materials such as raw chipboard, laminated chipboard and OSB boards. A confirmat wood screw has three different diameters, so it is necessary to drill with this three-stepped drill bit. If you do not have a confirmat drill bit, you must use two ordinary drill bits of different diameters.

The offer of NÁSTROJE CZ, s.r.o. includes drills with a diameter of 5.00 mm to a diameter of 7.00 mm. For drill dimensions, see the table.

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