The procedure was:
- Strand clean Strip at the end in the required length, making sure that no wires from tearing and afterwards during pressing missing
- Push the cable lug on this wire strands may be no bent backwards
- Presses, note that the punch hits the sleeve center
It was striking that the isolation of the shoe always easy had to protrude right (0,7..1mm), so that the stamp the sleeve center met and a reliable pressure emerged. Professional Pedicure possess for this purpose often a stop. Note for beginners: the moving handle is always down, the cable shoe is so placed that the tongue or eyelet of the cable lug to the right and the wire sticking out on the left of the pliers.
The forceps was, like most, it will handle, always completely closed, so pressed until the two handles touching the inside (where the tongs pressed only slightly stronger than when you pressed only until the release point of the ratchet). The adjuster for the pressing force was in middle position.
To measure the pull-out force was calibrated Zugwaage brand core available, which can be adjusted so that it holds the maximum value 5sec. Accuracy of the scale is better than 1N. For this, the cable shoe is clamped in a vice (only the shoe, not the sleeve) and with the Zugwaage on the strand is pulled until it slipped out of the sleeve and read the maximum tensile force.
The following excerpt forces were measured:
Red cable lug and wire 1,5qmm:
Target: 150N
Measured: 160N to 261N
Blue cable lug and wire 2,5qmm:
Target: 230N
Measured: 190N to 350N
The lower value was found at low-lugs, high in good and correspondingly more expensive goods with a metal cable clamp that is pressed onto the Litzenisolation.
So you can find:
When crimping insulated cable lugs the pliers live up to expectations. The results depend on how expected was the quality of the cable lugs used and have high-quality cable shoes well. Of course you does not have the precision of a 10x so expensive professional tool, but for hobbyists, they do just fine. One can come close to the target extraction forces, must then but make the effort to the pull-out force of the terminals as described above used once to measure and, if necessary, adjust using the wheel for the pressing force.
16/01/2015 An addendum:
The often occurring case 1,5qmm strand in cable lug blue, so sleeve only partially filled, without Zugentlastungscrimp insulation, pressed with use A30J blue gives a measured extraction force of 217N, 150N target would be minimal. So here also a good result.
Still on the subject of ferrules: the beliiegende use A26TW wears for newcomers something irritating designations 2 * 0.5 * 0.75 2, etc. This means that this application is intended for doppeldrähtige ferrules so ferrules where stuck 2 strands. Something occurs, for example in cabinet wiring because wires often must be continued. But if you want to connect only one connector to a cable, which is stuck only 1 wire in the sleeve. In this case, you simply always pressed as a compromise the sleeve to the next smaller marker, eg 1,5qmm to 2 * 1qmm. A pressed after this procedure ferrule for 1,5qmm on a wire with 1,5qmm could no longer pull by hand. The measured per Zugwaage extraction force was 83N, a sufficiently high value considering the sleeve is significantly thinner than that of a cable lug.
