SHRINKING AND STRETCHING JAW ASSEMBLIES

All ERCO machines are equipped with the patented ‘’ERCO’’ Shrinking Jaws or Stretching Jaws assemblies. They are easily interchangeable by means of Quick Change dovetail slide type anvils. The stippled surfaces of the jaws are parallel, and grip the work at two points. The action of the jaws then shrinks (or stretches) the material between these two points. For removing wrinkles from the flanges of a channel section, extended jaws are available. Jaw assemblies for special shrinking/stretching applications are available or can be designed and manufactured upon request.

The stippled working surfaces of the jaws grip the work piece and impart a finish to the material surface. A standard No.2 stippled jaw surface is used for a wide variety of applications. There are three finer grades of jaw stipple available: Nos. 1, 0, and 00. For work with harder alloy metals, a more coarse No.3 stippled jaw surface may be appropriate. When stippling on the jaws is worn smooth, they can be reground and restippled in any grade for a nominal charge.