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Luhr Jensen

Hook Soldering Device


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[Materials List] [Models/Blue Prints] [Other Images]


Manual placement of solder sticks for a lure hook required operators to work in close proximity to solder and flux fumes, handle liquid acid flux and manipulate small pieces of solder with small tweezers. As a result, workers suffered from shoulder, wrist and eyestrain with quality suffering as well. Although ventilation concerns were addressed, there was still a concern over long term exposure to the liquid flux and flux fumes during the heating process. A new process and method of application was needed to replace the flux and manual processes.


A process utilizing solder paste combined the flux and solder into one component which was easily dispensed using a controlled metering system on a dial index machine with a programmable logic controller. The machine has 12 fixtures on the dial table which, after being loaded, travel through a solder pasting, heating, air blow-off and water cooling stations. The loading and unloading of spoon bodies and hooks remains manual.


A pre (existing process) and post (new process) ergonomic assessment confirmed that ergonomic and safety/health risks had been eliminated or reduced. Replacing the solder sticks with dispensed solder paste has eliminated the manual process of placing flux-dipped solder sticks with small tweezers. Providing an enclosure for the process with only an opening to load/unload has dramatically improved ventilation and placing the flame away from the operator has improved safety as well.


  • Luhr Jensen & Sons, Inc. – Dave Lind Phone: 541-386-3811 ext. 254
  • OMEP – Mark Biederbeck Phone: 503-977-4115
  • Oregon OSHA – Mark Hurliman Phone: 1-800-922-2689


Materials List:

Models/Blue Prints:

  • CAD files and Wire Model files are available for review. Contact Oregon OSHA Standards & Technical Section, (503) 378-3272 toll free in Oregon, (800) 922-2689 or send e-mail to tech.web@state.or.us

Other Images: