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Discussion in 'Trumpet Repair and Modification' started by BrassBandMajor, Jun 11, 2015.
Hammers have no place on 98% of bell flare dents.
Even WITH the correct tools ($2500.00 worth to date) I'm still learning after 6 years....
If you are messing around, that youtube above shows you some things that you should buy or DIY. I do not assume that you would tackle a critical instrument without experience.
My first repair tool I started with was a 3"x1" engine piston pin, with this I was able to successfully remove dents in a bell down as far as I could reach, next was an assortment of steel balls from 1/4" to 1" from a bearing supplier, softened, drilled and threaded to fit a selection of steel rods of various diameters and lengths.
Next I purchased an economy set of dent olives, flexible driver and small planishing hammer from Votaw Tools, cost around $500, small hand held gas torch $100 from local jewellers supplies. These are the only tools I have purchased. I have made several tapered mandrels of various lengths and tapers from scrap steel bar I have scrounged, a 2 handed roller and simple wooden jig to hold a trumpet while soldering.
I have had a good relationship over 30 years with a repairman who has been willing to let me watch him at work and discuss techniques with me (answer stupid questions).
While I don't want to recommend using a drumstick, Note that the drumstick method has been used by many in the past- sometimes when other equipment wasn't available. I've seen a master repairman push a couple of dents out in the field with one. Looked brand new. Of course, he could have probably used anything. It really becomes more of an art. Proper equipment is always best. (I just commented on the book, Zen and the art of motorcycle maintanence in another post, but seems to relate here.
I used a drumstick my self, and it works like this tool: N71 French Horn Dent Rod 1/2â€ (12.7mm), 3ft (.91mm) â€œSâ€ Curve â€“ Ferree's Tools Inc I had some types that I could bend to the right curve, and when it was straight it worked like the drumstick. But I can't remember using a drumstick on bells.
You need a heck of a lot more than a drum stick. Thats for sure.
I popped a brace off my Scherzer piccolo while trying to remove a dent with the handle of a wooden spoon. The bell angle moved about 15 degrees.