144 VM90/100 Dovetail jaws

£75.50 *

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Description

Dovetail Jaws have been designed to mount bowls by expanding into a recess or clamping onto a spigot. 

The sizes indicated on the drawing are when the jaws form a perfect circle.  VM90 and VM100 chucks provide approx. 38mm of expansion beyond these specified sizes. All Dovetail Jaws have an internal dovetail angle of 13 degrees for clamping and an external dovetail angle of 13 degrees for expanding. 

The Vicmarc range of Dovetail Jaws also has a machined taper on the face of the dovetail which aids in clamping both on a tenon (clamp mode) and in a recess (expansion mode).  When clamping on a tenon it is often the case that the flat section of the bowl/tenon will be tapered the wrong way slightly or may have wood fibers or debris that can be in the corner of the tenon.  With the jaws being slightly tapered it allows for a firm and accurate hold slightly away from the corner.  This will ensure an accurate hold without wobble.  When clamping in a recess the flat section is often tapered towards the center of the bowl.  This taper allows for a firm hold right in the corner (outermost diameter) which will ensure an accurate hold.

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