Zig-Zag tighten wired frames crimping tool

01 · MECHANICS

It tensions by taking up length, not by stretching the steel

The wire is anchored at both ends and the span between the side bars is fixed: once strung, pulling on it takes up no slack. What the jaw does is change the path the wire takes. As it closes, the opposed teeth force the wire to zig-zag, and that wave needs more wire to cover the same span; the length the wave swallows comes out of the rest of the run, which is left taut. The teeth cover the whole jaw face, so one squeeze crimps the entire stretch it grips.

02 · ADJUSTMENT

The stop screw sets how much tension each squeeze adds

The upper arm carries a screw with a lock nut acting as a mechanical stop: the less it protrudes, the further the jaws close, the deeper the wave and the more length it takes up. Set it on an offcut of wire and tighten the lock nut once you find the point. If the run is still slack, add a second squeeze a few centimetres along; there is no way back, because a wave already formed cannot be undone. And over-squeezing thin wire risks snapping it or pulling the side bars inwards.

03 · WHEN TO USE IT

On wire already strung, before the foundation goes in

The order is wire the frame, tension it by hand, then finish with the pliers; only then fit and embed the wax foundation. It earns its keep on reused frames: once the old comb is melted out the wire sags, and one squeeze per run saves re-wiring the whole frame. Work run by run, on the free span, away from the side bar eyelets. Since it acts on the wire and not on the woodwork, the format is irrelevant: the same tool serves National, Commercial, Langstroth or Dadant.

04 · BEFORE YOU BUY

It is not a tensioner to start from scratch: the wire has to be strung and already carrying some tension, because on a loose run the wave forms but pulls on nothing. It does not drill, wire or embed: one step of the build, not the kit. The screw changes the depth of the wave, not its pitch, and that is what suits it to different wire gauges: the maker positions it for heavier wire. And every crimp shortens the wire permanently, so the number of re-tensions per wire is limited.