3 Attachment(s)
I need more concentrated heat for soldering /melting than just LPG
Hi, I have a Sievert professional LPG torch with a needle nozzle and whatever the next size nozzle up is and I'm struggling on some projects to get the heat that I really want. In the past I have used oxy acetylene in industrial applications and it was so powerful I could do anything with it. Whereas the LPG with the needle nozzle gives a much bigger flame (cone) than say a number 5 acetylene nozzle but the actual heat content is much lower.
To give you an example of my difficulty, I wanted to make earrings with glass beads sandwiched between two strips of 4mm wide silver and a 0.8mm diameter wire passing through the bead. I balled one end of the wire and passed the fee end through the silver then a bead and on through the second strip of silver. I cut the wire such that about 3mm of wire was left sticking out adjacent to the silver strip. The idea was to ball up the final end of the wire but the heatsinking effect of the strip was so great that I couldn't even get the end of the wire red hot.
Attachment 13457
You can see the balled end where I started at the top of the bead but I had to fold the bottom end of the axle wire to finish it off. To keep the heat off the axle wire from getting to the bead, I wound a 'spring' coil of silver wire that fills the hole in the bead while letting the axle wire pass through it. (that coil also filled the hole to stop the beads moving up and down)
I couldn't use the larger nozzle as the wider flame would have shattered the bead. I had been thinking of going for a Map gas and oxygen torch but is there a good LPG/Oxygen torch option that is even close to the performance of oxy acetylene or Map gas?
Any practical advice/recommendations will be much appreciated
Kind Regards . . . Andy (Aberystwyth)