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• FORSTNER DRILL BIT SERIES

This design allows them to cut a clean, flat-bottomed hole with little or no tear-out on the back side of the workpiece.įorstner bits are available in a range of sizes and are typically used in woodworking and carpentry to create holes for dowels, screws, and other fasteners, as well as to create mortises and other joinery.

FORSTNER DRILL BIT SERIES

Unlike twist drill bits, which have a point that cuts into the material and a helical flute that removes the chips, Forstner bits have a flat end and a series of small, flat cutting edges around the circumference of the bit. It is named after its inventor, August Forstner, who patented the design in the late 19th century. Related Post: From Wood to Product Through Process What is a Forstner Bit?Ī Forstner bit is a type of woodworking drill bit that is designed for boring precise, flat-bottomed holes in wood.

Here’s the same chart as above but in image format for easier printing/sharing/etc. Forstner Bit RPM Speed Chart (Text Version) Imperial Size (Inch) Metric Size (MM) Hardwood Speed (RPM) Softwood Speed (RPM) Acrylic Speed (RPM) 1/4″ – 3/8″ 6.35 – 9. If you are not sure what speed to use, it’s always a good idea to start slow and gradually increase the speed if needed. It’s also a good idea to use a low torque setting on your drill when working with Forstner bits, as this can help to reduce the risk of the bit binding or breaking. In general, you should use a slower speed when cutting with a Forstner bit to help ensure that the cutting edges stay cool and to reduce the risk of the bit overheating or breaking. The speed at which you should use a Forstner bit depends on several factors, including the type and thickness of the material you are cutting, the size of the bit, and the power of your drill. Can you use a Forstner bit in a hand drill? Or a drill press?įorstner bits are high-quality cutting tools that are used for making precise, flat-bottomed holes in wood and other materials.Forstner Bit RPM Speed Chart (Image Version).Forstner Bit RPM Speed Chart (Text Version).