What sizes of expansive bit are available?
What sizes of expansive bit are available? |
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Expansive bit sizes are governed by their cutters. Most expansive bits will be provided with two cutters, one large and one small. | |||
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Small cuttersSmall cutters can bore holes from around 16-22mm (5/8“-7/8“) at their smallest setting to 40-50mm (19/16“-2”) at their largest. |
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Large cuttersLarge cutters can bore holes from around 22-40mm (7/8“-19/16“) at their smallest setting to 76-150mm (3″-6”) at their largest. |
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LengthExpansive bits are around 200mm (8″) long. |
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Expansive bits made specifically for plumbing, referred to as “stubby” expansive bits, have much shorter shanks and measure just 125mm (5″) in length. This allows plumbers to use the bits in confined spaces. They are now extremely rare. | |||
A note on accuracy |
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Expansive bits have been known to cut slightly wider holes than indicated on their integrated measuring system, | |||
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This should not be a major problem but if accuracy is very important then you may need to consider boring a few test holes before you use the bit on your DIY project proper. | |||
