Short Auger Bits for Use with Electric Drill or Jaw Brace plus instructions

Dieter Schmid - Fine Tools

Georg-Wilhelm-Str. 7 A - 10711 Berlin
Tel ++49 30 342 1757 - Fax ++49 30 342 1764
Website: www.fine-tools.com

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Short Auger Bits in many Sizes

From left to right: 3 mm (1/8 in.), 6 mm (1/4 in.), 10 mm (3/8 in.), 19 mm (3/4 in.), 30 mm (1 1/4 in.).
Suitable for power drill and jaw brace.

Instructions for use with non-electric devices

Jaw brace
Important: To be used only in braces with with two- or three-jaw chucks - not suitable for braces with four-jaw chucks! Shown at left is an old-fashioned brace with two-jaw chuck driving the 19 mm (3/4 in.) hex-shank auger bit. This set-up drilled easily through larch with no undue stress on the chuck jaws.

An square-shank auger bit is, naturally, ideal for drilling with a four-jaw brace. The shank fits exactly into the recesses machined into the jaws and drilling torques are transmitted to the base of the chuck rather than to its more sensitive jaws. Unfortunately, this type of bit can be used only in a brace, and not in electric drills or drill presses, which typically have two- or three-jaw chucks. Consequently, we offer the auger bits shown, which can be used in braces in all of these tools.

Using too much force (torque) can damage jaws or recesses, or both. It is important to use only as much force as is necessary for the bit to cut into the material. Our drilling trials in larch have demonstrated that this is possible.

While these auger bits are ideal for two- and three-jaw chucks, four-jaw chucks will not grip their hexagonal shanks.

Kuri Kuri These bits are very well suited for the small Japanese brace Kuri Kuri. We recommend use of bits no larger than 12 mm (1/2 in.). It is possible to use larger bits, but drilling is slow and rather tedious.

Wheel brace The wheel braces made by Schröder, are also well-suited for use with hex-shank auger bits. Again, we recommend bits no larger than 8 mm (5/16 in.). Use of larger bits is possible but makes drilling slow and difficult.

Instructions for use with non-electric devices
	Important: To be used only in braces with with two- or three-jaw chucks - not suitable for braces with four-jaw chucks! Shown at left is an old-fashioned brace with two-jaw chuck driving the 19 mm (3/4 in.) hex-shank auger bit. This set-up drilled easily through larch with no undue stress on the chuck jaws. An square-shank auger bit is, naturally, ideal for drilling with a four-jaw brace. The shank fits exactly into the recesses machined into the jaws and drilling torques are transmitted to the base of the chuck rather than to its more sensitive jaws. Unfortunately, this type of bit can be used only in a brace, and not in electric drills or drill presses, which typically have two- or three-jaw chucks. Consequently, we offer the auger bits shown, which can be used in braces in all of these tools. Using too much force (torque) can damage jaws or recesses, or both. It is important to use only as much force as is necessary for the bit to cut into the material. Our drilling trials in larch have demonstrated that this is possible. While these auger bits are ideal for two- and three-jaw chucks, four-jaw chucks will not grip their hexagonal shanks.
	These bits are very well suited for the small Japanese brace Kuri Kuri. We recommend use of bits no larger than 12 mm (1/2 in.). It is possible to use larger bits, but drilling is slow and rather tedious.
	The wheel braces made by Schröder, are also well-suited for use with hex-shank auger bits. Again, we recommend bits no larger than 8 mm (5/16 in.). Use of larger bits is possible but makes drilling slow and difficult.