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| Lew_Merrick_PE:
Hi Simon, A couple of question/comments: (1) Banjo pegheads are traditionally cut with the "sides" perpendicular to the fretboard face (unlike guitar pegheads). (2) What size fret wire are you using that allows you to use a hacksaw blade to cut the slots? The wire I use requires a .026 to .030 (inch) slot width in ebony. As your fretboard is made of softer woods, I would postulate a narrower slot requirement. |
| nrml:
I've been silently following this thread all along. I am glad you came through that unscathed :jaw:. Thanks for posting the pictures as a reminder to everyone not to cut corners where safety is concerned. We are all guilty of it from time to time. |
| S. Heslop:
--- Quote from: AdeV on July 23, 2015, 11:36:01 AM ---Are you sure you're not the Batman? Seriously - I'm with Norman on this one - thanks for sharing, it's a timely reminder that some of the stuff we do is quite dangerous... Speaking of which, what actually were you doing? I must have missed the post where you were making a charcoal bomb? --- End quote --- I was trying to case harden. The idea is to seal the thing in a canister packed with charcoal and get it hot. Obviously gasses will probably be released, and internal pressures would increase. To try deal with this I only sealed the canister with some fire cement, since bolting it down would make a quite literal bomb. I suppose the fire cement did what it was supposed to, but I didn't imagine it'd be so sudden and dramatic. I think if I were to do it again, i'd probably either drill a pinhole into the top of the canister, or i'd leave a small gap in the fire cement seal. Although if I was to really do it again, i'd go about building an electric furnace. The big reason I avoided doing so is because I just don't have the space. --- Quote from: Lew_Merrick_PE on July 23, 2015, 12:42:12 PM ---Hi Simon, A couple of question/comments: (1) Banjo pegheads are traditionally cut with the "sides" perpendicular to the fretboard face (unlike guitar pegheads). (2) What size fret wire are you using that allows you to use a hacksaw blade to cut the slots? The wire I use requires a .026 to .030 (inch) slot width in ebony. As your fretboard is made of softer woods, I would postulate a narrower slot requirement. --- End quote --- Don't quite know what you mean with the banjo peghead sides. For the fretwire the tang is about 0.8mm wide. The hacksaw blade is a junior hacksaw blade and is about 0.6mm wide, measured from the teeth (to account for the set, hopefully). It probably cuts a wider slot, but I did a test slot to see if it was suitable and it took alot of force to remove the fret wire. Enough that it teared the wood out from the sides of the slot. I've heard that putting a slight bevel on the fret slots can help prevent that from happening if you ever need to re-fret the instrument. |
| tom osselton:
Glad your ok! That is the last thing I would expect to happen! |
| Lew_Merrick_PE:
--- Quote from: S. Heslop on July 23, 2015, 02:41:40 PM ---Don't quite know what you mean with the banjo peghead sides. --- End quote --- Normally (at least on this side of the pond) a banjo's peghead is cut with the fretboard face held to the jigsaw or bandsaw table as the contour is cut. --- Quote from: S. Heslop on July 23, 2015, 02:41:40 PM ---For the fretwire the tang is about 0.8mm wide. The hacksaw blade is a junior hacksaw blade and is about 0.6mm wide, measured from the teeth (to account for the set, hopefully). It probably cuts a wider slot, but I did a test slot to see if it was suitable and it took alot of force to remove the fret wire. Enough that it teared the wood out from the sides of the slot. I've heard that putting a slight bevel on the fret slots can help prevent that from happening if you ever need to re-fret the instrument. --- End quote --- I normally make classic or flamenco guitars and frailing banjos. It sounds as if you have fret wire for an electric guitar. ??? |
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