Dieless-type Crimpers The other class of hydraulic crimping tools are the dieless tools. Dieless actually means that there is no die insert change needed when one needs to crimp a different con- nector size within the range of the tool. The dieless hydraulic tools can be further classified by the three general crimp shapes that are made. One group of dieless tools makes crimps which are of the nest and indentor style with the next being a stationary portion of the tool and the indentor moving with the hydraulic ram. A second grouping of dieless tools makes use of multiple indentors which indent the connector from multiple sides without the use of a nest. The third group of dieless tools provides a crimp which surrounds the connector barrel and has an appearance more like that of a die type tool than either of the two indentor style dieless tools can provide. All of the dieless tool types are capable of crimping cylindrical connector barrels as recommended by their respective manufacturers.
several dozen die sets that may be required to crimp all of the connectors within the installation range of the specific hydraulic crimping tool. Certain styles of connectors used in the electric utility industry are designed to minimize the number of crimping die sets that each line crew must carry. These special con- nectors are designed to have a constant outside diameter on the crimp barrel portion of the connector with various inside diameters to match conductor size. For example, a popular grouping of electric utility connectors has a constant outside diameter of 0.640 inches for a series of cable sizes from No. 10 AWG through 1/0 AWG and all of the individual connec- tors are crimped with the same die insert. Electric utilities also use a series of compression taps with a cross section shape similar to the letter “H” which are grouped to install most cable size combinations between No. 6 AWG and 500 kcmil with only three crimping die sizes.
FIGURE 1B
FIGURE 1A
Surrounding crimp styles
Indent
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