Anthony Panke Posted August 31, 2019 Report Share Posted August 31, 2019 Which bending iron would people recommend buying for a violin/viola? I’m looking for something electrically heated, possible to clamp to a workbench (vise, dogs or clamps, I don’t mind which) and temperature-adjustable. thanks in advance for suggestions! Quote Link to comment Share on other sites More sharing options...
saintjohnbarleycorn Posted August 31, 2019 Report Share Posted August 31, 2019 I got one on ebay , offered less , it works fine has temp readout , I added some bolts and metal right angle plate to bottom to set in vise.. not sure how the tariff thing affects you in somewhere so they might be higher now. Quote Link to comment Share on other sites More sharing options...
Nick Allen Posted August 31, 2019 Report Share Posted August 31, 2019 1 minute ago, saintjohnbarleycorn said: I got one on ebay , offered less , it works fine has temp readout , I added some bolts and metal right angle plate to bottom to set in vise.. not sure how the tariff thing affects you in somewhere so they might be higher now. You and I probably have the same bending iron. Quote Link to comment Share on other sites More sharing options...
saintjohnbarleycorn Posted August 31, 2019 Report Share Posted August 31, 2019 yes probably, it has worked fine for me. I used to use some brass ones that you heated up on a hot plate, this is much easier to control temp. Quote Link to comment Share on other sites More sharing options...
Ken_N Posted August 31, 2019 Report Share Posted August 31, 2019 I bought a cheap Chinese one on eBay, and the profile was terrible. I filed it a lot, but it still isn't great; I had to give up when I reached the bolt holes. The ends are too round, and the flats are too straight, if that makes sense. Wood doesn't bend like that. It is more progressive. Maybe more like a French curve. They didn't think it out, and they aren't luthiers. No temperature readout. Plug it in, and wait 20-30 minutes and bend. That said, it does work, and I even used it for an Archtop guitar with a cutaway; and didn't break either rib. But it isn't ideal. I don't know which ones are. Probably any are better! If I was making a lot of them, I'd buy a different one. Ken Quote Link to comment Share on other sites More sharing options...
JohnCockburn Posted August 31, 2019 Report Share Posted August 31, 2019 Doing this: bending iron site:maestronet.com will give you more information than you could possibly need. Quote Link to comment Share on other sites More sharing options...
saintjohnbarleycorn Posted August 31, 2019 Report Share Posted August 31, 2019 here is what I have and used to use Quote Link to comment Share on other sites More sharing options...
Janito Posted August 31, 2019 Report Share Posted August 31, 2019 If in UK: https://luthiers-bench.com/ The iron and strap are lovely tools. Quote Link to comment Share on other sites More sharing options...
PASEWICZ Posted August 31, 2019 Report Share Posted August 31, 2019 3 hours ago, Janito said: If in UK: https://luthiers-bench.com/ The iron and strap are lovely tools. Janito, Do you have these tools? Quote Link to comment Share on other sites More sharing options...
Janito Posted September 1, 2019 Report Share Posted September 1, 2019 2 hours ago, Jerry Pasewicz said: Do you have these tools? Yes. If tempted, wait for FOREX on November 1, 2019. Quote Link to comment Share on other sites More sharing options...
arglebargle Posted September 1, 2019 Report Share Posted September 1, 2019 3 hours ago, Jerry Pasewicz said: Janito, Do you have these tools? I bought one as well. Very happy. Please see thread here. Quote Link to comment Share on other sites More sharing options...
Muswell Posted September 1, 2019 Report Share Posted September 1, 2019 (edited) Me too, they are excellent. Edited September 1, 2019 by Muswell typo Quote Link to comment Share on other sites More sharing options...
Andreas Preuss Posted September 1, 2019 Report Share Posted September 1, 2019 Using a bending iron seems to me like waste of time. Soaking ribs I water let them dry on a special mould and then give them the final shape on the inside or outside mould is more time efficient. Ribs simply need to be thin enough. Quote Link to comment Share on other sites More sharing options...
Davide Sora Posted September 1, 2019 Report Share Posted September 1, 2019 2 hours ago, Andreas Preuss said: Using a bending iron seems to me like waste of time. Soaking ribs I water let them dry on a special mould and then give them the final shape on the inside or outside mould is more time efficient. Ribs simply need to be thin enough. This is interesting, could you describe how you do it? cold? hot? vapor? Although, judging from the burns that you see on ribs of some old Cremonese instruments, it looks like they used a bending iron. Do you agree? Quote Link to comment Share on other sites More sharing options...
Andreas Preuss Posted September 1, 2019 Report Share Posted September 1, 2019 1 hour ago, Davide Sora said: This is interesting, could you describe how you do it? cold? hot? vapor? Although, judging from the burns that you see on ribs of some old Cremonese instruments, it looks like they used a bending iron. Do you agree? I think we can't throw all the cremonese instruments in the same pot. Just going by the thickness measurements of the ribs it seems clear that Del Gesu must have bent the ribs with an iron. Looking at the rib thicknesses of Strad however their measurements strongly suggest that the ribs have been bent by soaking and dried on a mould to give them their shape. Usually they are around 0.9 - 1.0 mm in the long arcs of the ribs and thinner at the narrow arcs of the corner blocks. I use this method for my Strad copies. I soak the ribs in cold water over night and the press them on a form. The form has a slightly narrower curve than the curve I want to achieve because when taking the ribs out they open up a little. If I can I let them dry for a week. When glueing them on the mould I wet them again when necessary. Quote Link to comment Share on other sites More sharing options...
arglebargle Posted September 1, 2019 Report Share Posted September 1, 2019 15 minutes ago, Andreas Preuss said: If I can I let them dry for a week. Now that seems like a "waste of time." Quote Link to comment Share on other sites More sharing options...
Andreas Preuss Posted September 1, 2019 Report Share Posted September 1, 2019 33 minutes ago, arglebargle said: Now that seems like a "waste of time." Doesn't involve my working time. Quote Link to comment Share on other sites More sharing options...
PASEWICZ Posted September 1, 2019 Report Share Posted September 1, 2019 8 hours ago, Janito said: Yes. If tempted, wait for FOREX on November 1, 2019. Janito, could you explain the “Forex” reference? Quote Link to comment Share on other sites More sharing options...
PASEWICZ Posted September 1, 2019 Report Share Posted September 1, 2019 5 hours ago, Andreas Preuss said: Using a bending iron seems to me like waste of time. Soaking ribs I water let them dry on a special mould and then give them the final shape on the inside or outside mould is more time efficient. Ribs simply need to be thin enough. This might work for new making, but we do restoration work. With that in mind, I would be very concerned with the potential of distorted ribs and cracking at the blocks that can be caused with moisture retention. Quote Link to comment Share on other sites More sharing options...
Mampara Posted September 1, 2019 Report Share Posted September 1, 2019 22 minutes ago, Jerry Pasewicz said: Janito, could you explain the “Forex” reference? Brexit. Lots of cheap goodies if the UK crashes out of the E U. Quote Link to comment Share on other sites More sharing options...
Andreas Preuss Posted September 1, 2019 Report Share Posted September 1, 2019 54 minutes ago, Jerry Pasewicz said: This might work for new making, but we do restoration work. With that in mind, I would be very concerned with the potential of distorted ribs and cracking at the blocks that can be caused with moisture retention. Right, not for restoration. The interesting thing is that so far to my experience moisture retention didn't cause cracks. I rather discovered that the the ribs are shrinking lengthwise. So if you put the c ribs tightly on the mould in a not perfect dry state they lift up from the mould. Quote Link to comment Share on other sites More sharing options...
PASEWICZ Posted September 1, 2019 Report Share Posted September 1, 2019 47 minutes ago, Andreas Preuss said: I rather discovered that the the ribs are shrinking lengthwise. There must be another explanation, otherwise our houses would get taller when it is raining. Quote Link to comment Share on other sites More sharing options...
Andreas Preuss Posted September 1, 2019 Report Share Posted September 1, 2019 21 minutes ago, Jerry Pasewicz said: There must be another explanation, otherwise our houses would get taller when it is raining. Maybe they are. Did you ever measure it? The difference would be so small that you wouldn't notice it anyway. However on a wooden structure supporting weight, things might be a bit different from wood which is cut very thinly compared to its length and made of a material where the fibers don't run straight but in waveform. My guess is that on unflamed material it doesn't shrink so much. Quote Link to comment Share on other sites More sharing options...
Jim Bress Posted September 1, 2019 Report Share Posted September 1, 2019 1 hour ago, Andreas Preuss said: Right, not for restoration. The interesting thing is that so far to my experience moisture retention didn't cause cracks. I rather discovered that the the ribs are shrinking lengthwise. So if you put the c ribs tightly on the mould in a not perfect dry state they lift up from the mould. Maybe the ribs are thicker while retaining moisture? Quote Link to comment Share on other sites More sharing options...
PASEWICZ Posted September 1, 2019 Report Share Posted September 1, 2019 2 minutes ago, Jim Bress said: Maybe the ribs are thicker while retaining moisture? Yes they are, by 8%, that could be the explanation. Quote Link to comment Share on other sites More sharing options...
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