created 28/09/19 - last
fingers are often the most versatile
workholding devices, many parts are too small
or fingers cannot exert sufficient force to steady parts.
Therefore, various types of hand-held vices are available.
Pin-vices are primarily meant to
hold round parts, but if slotted cross-wise can also be
used to hold flat parts. Pin-vices typically have a
capacity somewhere between 0 and 5 mm
diameter. Hand-vices are made in many different
sizes. Jaws can be as small as 10 mm wide and up to 40 mm wide.
The jaws are either smooth or serrated. There are two principal
mechanisms: either the two jaws are hinged at some point or they
move in guides and then are parallel to each other, which is
preferable to protect the workpiece.
Originally, pin-vices were tool-holders for pins, needles, broaches, reamers, taps, and drills. They are used in a wide variety of scientific and technical contexts for this purpose.
In the following a number of pin-vices and hand-held vices from my workshop are presented.