Ferrees Flute and Piccolo Head Swedging Dies were designed to shrink the tenons that have been over expanded. These dies can also be used to remove ridges and dents from tenons that have been previously improperly repaired. The proper sized die should be firmly held by a vise. Use cork grease or Z6 Synthetic Lubricant laced petroleum jelly as lube on the tenon. Tighten the adjusting screw so the die barely closes on the tenon. Work the tenon. Then move it back and forth in the die with a semi-rotating motion. Test fit, often. FLUTE HEAD SWEDGING DIESN77A Has a .790 (20mm) Bore and is 1" (25.4mm) long. It fits most standard flutes.N77B Has a .790 (20mm) Bore and is 2" (50.8mm) long. Designed for repair technician who needs to cover a large area.N77C Has a .774 (19.7mm) Bore and is 1" (25.4mm) long. It fits Armstrong model 80 and some imported flutes.N77D Has a .975 (24.76mm) Bore and is 1 1/2" (38.1mm) long for the Armstrong alto flute.N77E Has a 1.030 (26.16mm) Bore and is 1 1/2" (38.1mm) long for Gemeinhardt alto flute.N77F Has a .774 (19.7mm) Like the N77C for Armstrong but 2" (50.8mm) long. PICCOLO HEAD SWEDGING DIE H64 Has a .470 (11.9mm) Bore and is 1-1/2 (38.1mm) long.
