Dovetail jaws are designed for mounting bowls by expanding into a recess or clamping onto a spigot. These Jaws were specially made for Woodworker's Emporium due to customer demand to fall in between the Standard (1-7/8") and the 100mm (4") Jaws.
The sizes indicated on the drawing are when the jaws form a perfect circle, which is achieved when the jaws are 2mm apart. VM90 and VM100 chucks provide approx 38mm of expansion beyond these specified sizes.
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