These jaws are used for expansion into small recesses and for firm holding of fine spindle work, such as earrings, chess pieces, etc. They are ideal for turning salt and pepper shakers.
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.
Andy Uren (Submitted on Mar 16th 2016)
This item was purchased to aid in salt and pepper mil production turning, it works very well and is a great addition to my shop.