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Weller Soldering Iron tips

PT Series

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Greensands	26/02/2021 15:39:07
449 forum posts 72 photos	Can anyone tell me what is special about the Weller PT Series soldering iron tips. They do not appear to be made from copper and have a plug at the end which carries a type number
Anthony Kendall	26/02/2021 15:55:38
178 forum posts	From memory they work on the curie point tocontrol temperature and are therefore magnetic. Curie point, also called Curie Temperature, temperature at which certain magnetic materials undergo a sharp change in their magnetic properties.
Martin Kyte	26/02/2021 16:11:56
3445 forum posts 62 photos	Iron clad copper so they don't dissolve in the flux. As stated above they are magnetic which holds the relay in when under temperature. On reaching the Curie point the field drops and switches the heater off. My new Weller double iron goes to sleep when no motion is detected and the tips last for ages. The only issue I have is soldering surface mount stuff when there is very little movement going on and iron goes to sleep. All of a sudden there is no heat and you have to wave your hand around. regards Martin
Tony Ray	26/02/2021 16:19:22
238 forum posts 47 photos	Hi the number indicates the heat range, 7 is common 8 iirc is hotter
Simon Williams 3	26/02/2021 16:44:24
728 forum posts 90 photos	If you append two zeros onto the number stamped on the end you get the nominal temperature in fahrenheit to which the temperature control operates. So 7 - 700F = fairly normal for 60/40 solder or its more modern lead free equivalent 8 = 800F = blooming hot

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