Of all the old tools that can be found in junk shops and flea markets, the best bargain-buys of all time have surely got to be expanding bits. For example, while a new 3-inch expanding bit is one of the most expensive items in the hand tool catalog, old expanding bits of the same size can easily be had for a handful of loose change. Thar said, just make sure when you arc checking over second-hand expanding bits that the lead screw, the cutting spur and lip, and the sliding track arc intact. Undo the main fixing screw and move the expanding blade along the track. If all is well, it should be a nice sliding fit. While you are at it sec if you can find any loose blades. Some types of expanding hits were sold with additional blades.
Adjustable spurred cutter above: A large size expanding bit
Adjustable spurred cutter
Adjusting screw above: An expanding bit with a spare small-sze blade.
. Additional blade above: A large size expanding bit above: An expanding bit with a spare small-sze blade.
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