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Straight steel jump liner, fourteen inches long, bare metal finish

Bernard

Bernard QJL-3545 Jump Liner .035-.045 in 14 in

SKU CH-3V8W-6E69E

Steel jump liner fits 0.035–0.045 in wire on 250–600 A MIG guns and enables fast neck changes

  • MaterialSteel
  • TypeJump Liner
  • Enables quick neck change-outs for faster workflow
  • Steel construction resists wear during high-heat MIG welding
  • Fits .035 to .045 in wire for versatile applications
  • Compatible with Bernard MIG guns including Q-Gun and S-Gun series
  • 14 in length suits standard MIG gun configurations

Bernard Jump Liner for MIG guns

The Bernard QJL-3545 Jump Liner is a steel consumable designed for MIG welding (GMAW). It fits wire diameters from .035 in to .045 in and suits 250 Amp S-Gun, BTB, Dura-Flux FCAW and W-Gun MIG guns. It enables quick neck change-outs for compatible Q-Gun and S-Gun models. It is not for welders using wire outside the .035-.045 in range or guns not listed as compatible.

Thermals noise and power draw

As a passive steel liner, the part generates no operational noise and draws no electrical power. Heat management depends on the parent MIG gun and the welding current, which spans 150A to 600A. The liner simply guides the wire through the 14 in length during the welding process. It does not alter the thermal characteristics of the gun itself.

Wire diameter range decides fit

The single specification that determines suitability is the wire diameter window of .035 in to .045 in. Only wire within this range will feed correctly through the 15.88 in bore diameter. Using thicker or thinner wire will cause feeding problems or excessive wear. Verify your wire size before ordering.

Highlights

  • Enables quick neck change-outs for faster workflow
  • Steel construction resists wear during high-heat MIG welding
  • Fits .035 to .045 in wire for versatile applications
  • Compatible with Bernard MIG guns including Q-Gun and S-Gun series
  • 14 in length suits standard MIG gun configurations

Specifications

BrandBernard
MaterialSteel
TypeJump Liner

Questions about this item

How do I install the Bernard QJL-3545 jump liner and what step is often missed?

Slide the liner into the gun neck until it seats fully at the 15.88 in bore, then lock the retaining nut; the step often missed is trimming the liner flush with the contact tip so wire feeds without drag.

What maintenance or replacement will the Bernard QJL-3545 jump liner need later?

Inspect the steel liner for kinks or bore wear after every 150 A to 600 A duty cycle; replace it when wire drag increases or the .035 in to .045 in wire path shows scoring.

What limit appears first on the Bernard QJL-3545 jump liner during sustained welding?

Heat buildup at the 14 in length restricts continuous output above 600 A, causing liner expansion that narrows the bore and increases wire friction first.

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