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Coil of 60/40 rosin-core solder wire on spool

Kester Solder

Kester Solder 24-6040-0027 60/40 .031" 1 lb soldering

SKU CH-8SKE-QVBCW MPN 24-6040-0027

Rosin-core 60/40 alloy solder in a 1 lb spool at .031" diameter for electrical and electronic work

  • TypeSolder
  • Size/Dimensions60.031 66/44
  • 60/40 tin-lead alloy melts smoothly for reliable electrical joints
  • .031 inch diameter suits fine-pitch components and tight spaces
  • 21 gauge wire feeds cleanly through automated or hand-fed irons
  • Rosin core flux activates quickly and leaves non-corrosive residue
  • One-pound spool provides ample material for extended production runs

Ideal for Electrical Assembly

This Kester 44 rosin core solder is formulated for electrical and electronic applications. The 60/40 tin-lead alloy melts predictably for reliable joints on circuit boards and wiring. A 1 lb spool at .031" diameter supplies enough material for extended bench work. The 21 gauge wire feeds smoothly through hand-held irons.

Sustained Bench Performance

The high-activity noncorrosive flux maintains excellent wetting action across long soldering sessions. Oxidation resistance remains consistent so joints stay bright without frequent tip cleaning. Flux residue stays non-conductive after cooling, eliminating the need for aggressive post-solder cleaning. The alloy's thermal behaviour stays stable from the first joint to the last.

Practical Handling and Storage

The spool dimensions (60.031 66/44) fit standard benchtop dispensers and tool drawers. Rosin core construction means no separate flux container is required, reducing clutter. Lead content requires standard ventilation and hygiene practices during daily use. The packaging protects the wire from kinking when stored between projects.

Highlights

  • 60/40 tin-lead alloy melts smoothly for reliable electrical joints
  • .031 inch diameter suits fine-pitch components and tight spaces
  • 21 gauge wire feeds cleanly through automated or hand-fed irons
  • Rosin core flux activates quickly and leaves non-corrosive residue
  • One-pound spool provides ample material for extended production runs

Specifications

BrandKester
Model24-6040-0027
TypeSolder
Size/Dimensions60.031 66/44

Questions about this item

Does the 60/40 alloy with 44 rosin flux produce strong fumes during long soldering sessions?

The 44 rosin core flux is non-corrosive and designed for electrical work; good ventilation is still recommended during extended use.

What iron tip diameter suits the .031" 21-gauge wire for clean joints?

A fine conical or chisel tip that matches the .031" diameter gives precise heat transfer for small electronic connections.

Will the 60/40 tin-lead alloy wet older component leads and PCB pads without extra flux?

Yes, the high-activity 44 rosin core provides excellent wetting on aged copper surfaces, so additional flux is usually unnecessary.

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