Forstner Bits

Frequently asked questions about Forstner Bits

• What do I use a Forstner bit for?
• For what types of material is a Forstner bit suitable?
• What must be considered when using a Forstner bit?
• Up to what diameter are Forstner bits available?
• What is the difference between a Forstner bit and a cylindrical bit?
• When should I use a Forstner bit with tool steel (WS) and when with tungsten-carbide cutting edges (HM)?

• 1. What do I use a Forstner bit for?

  The Forstner bit - named after its inventor, American Benjamin Forstner - is used in woodworking mainly for making flat bottomed holes. For example, a knot hole can be drilled out exactly and precisely. That is why the Forstner bit is also colloquially called knothole drill. In addition, it can also be used to make holes for concealed hinges in furniture.

• 2. For what types of material is a Forstner bit suitable?

  Forstner bits belong to the category- wood drills and are therefore suitable for wood and wood-based materials.

• 3. What must be considered when using a Forstner bit?

  Forstner drills are equipped with a centring point due to the diameter of the bit. It is important to make sure that this centre point is firmly held in the workpiece when the drill is applied. This is the only way to ensure that the drill does not slip during drilling and that a clean hole is produced.

• 4. Up to what diameter are Forstner bits available?

  Our assortment offers you a large selection of Fornstner bits. In our Classic range we offer bits up to Ø50 mm, Tool steel (WM) range up to Ø60 mm and in Tungsten-Carbide (HM) up to Ø60 mm.

• 5. What is the difference between a Forstner bit and a cylindrical bit?

  The cylindrical drill is a variation of the Forstner bit. While the Forstner drill usually consists of a centre point, two main cutting edges and two closed circumferential cutting edges, the cylindrical drill is equipped with two open circumferential cutting edges. In general, the Forstner bit is ideal for free-hand applications and the cylindrical drill is ideal for working with a stationary device, such as a drill stand.

• 6. When should I use a Forstner bit with tool steel (WS) and when with tungsten-carbide cutting edges (HM)?

  Drill bits with tungsten-carbide cutting edges generally have a longer service life and are particularly suitable for hard woods. Tthey are also ideal for wood-based materials such as MDF and chipboard.

  Fornstner drills made of tool steel are ideal for drilling in soft woods.

  Our tip:

  If you are looking for an entry level Forstner bit set, then we recommend the Classic Forstner bits from FAMAG. Here you find good quality at a fair price!