Expansive Bit: Difference between revisions
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[[File:ExpansiveBit.png|200px|right]] | [[File:ExpansiveBit.png|200px|right|link=http://www.amazon.co.uk/gp/product/B000LFU91Y/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=B000LFU91Y&linkCode=as2&tag=dton06-21]] | ||
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=====Description===== | |||
[https://en.wikipedia.org/wiki/Drill_bit#Adjustable_wood_bits '''Expansive Bits'''] ''(aka Adjustable Bits)'' are available with a [https://en.wikipedia.org/wiki/Drill_bit_shank#Brace_shank '''Tapered Square Shank'''] for use with a '''[[Carpenter's Brace|Brace]]''' or a [https://en.wikipedia.org/wiki/Drill_bit_shank#Hex_shank '''Hexagonal Shank'''] suitable for use with '''[[Portable Electric Drills|Power Drills]]'''. | [https://en.wikipedia.org/wiki/Drill_bit#Adjustable_wood_bits '''Expansive Bits'''] ''(aka Adjustable Bits)'' are available with a [https://en.wikipedia.org/wiki/Drill_bit_shank#Brace_shank '''Tapered Square Shank'''] for use with a '''[[Carpenter's Brace|Brace]]''' or a [https://en.wikipedia.org/wiki/Drill_bit_shank#Hex_shank '''Hexagonal Shank'''] suitable for use with '''[[Portable Electric Drills|Power Drills]]'''. | ||
They have a small central pilot drill and adjustable cutting blades which enable holes to be drilled at any size between approximately 20mm and 75mm diameter. It is the ability to drill odd size holes which is their main use today. As with most '''[[Auger Bits]]''' they can be sharpened with a file. | =====Features and Applications===== | ||
They have a small central pilot drill and adjustable cutting blades which enable holes to be drilled at any size between approximately 20mm and 75mm diameter. It is the ability to drill odd size holes which is their main use today ''(but '''considerable''' effort would be required to drill a hole 75mm diameter!)''. As with most '''[[Auger Bits]]''' they can be sharpened with a file. | |||
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{{Expansive Bit Buyers Guide}} | |||
[[Category:Drilling and Boring]] | [[Category:Drilling and Boring]] | ||
Latest revision as of 19:18, 20 August 2016
Description
Expansive Bits (aka Adjustable Bits) are available with a Tapered Square Shank for use with a Brace or a Hexagonal Shank suitable for use with Power Drills.
Features and Applications
They have a small central pilot drill and adjustable cutting blades which enable holes to be drilled at any size between approximately 20mm and 75mm diameter. It is the ability to drill odd size holes which is their main use today (but considerable effort would be required to drill a hole 75mm diameter!). As with most Auger Bits they can be sharpened with a file.
Note: Most wood bits will cause splitting if an attempt is made to drill straight through the material. Best practice is to drill from one side until the tip emerges on the reverse then turn the wood around and complete drilling from the other side.
