Eight sided forged ferrule staking crimped fitting and method of manufacture thereof
Methods of making hose fittings include providing a stem having a fluid conduit, a first end, a second end with a raised shoulder, and a crimp region disposed between the first end and the second end. A swivel tube nut is placed over the stem, and the swivel tube nut is retained on the stem the by the raised shoulder. A ferrule is thereafter placed over the first end of the stem, and the ferrule comprises a partially or fully formed octagonal wrench surface, formed prior to. The ferrule is then crimped, at the octagonal wrench surface, onto the crimp region of the stem.
1. A method of making a hose fitting, comprising:
providing a stem comprising a fluid conduit there through, a first end, a second end with a raised shoulder, and a crimp region disposed between the first end and the second end;
providing and placing a swivel tube nut over the stem, wherein the swivel tube nut is retained on the stem the by the raised shoulder;
placing a ferrule over the first end of the stem, wherein the ferrule comprises a partially or fully formed octagonal wrench surface which is forged into the ferrule prior to placing the ferrule over the first end of the stem; and,
crimping the ferrule at the octagonal wrench surface onto the crimp region of the stem;
wherein the crimping is conducted using a crimp die tool, and wherein the crimp die tool includes at least two die pieces engaging the octagonal wrench surface of the ferrule.
2. The method according to claim 1 , wherein the crimp die tool includes at least four die pieces engaging the octagonal wrench surface of the ferrule.
3. The method according to claim 2 , wherein the crimp die tool includes at least eight die pieces engaging the octagonal wrench surface of the ferrule.
4. The method according to claim 1 , wherein the crimp region comprises one or more of knurls and raised grooves for mating with the ferrule.
5. The method according to claim 1 , wherein the hose fitting consists of the swivel tube nut, the ferrule and the stem.
6. The method according to claim 1 , wherein the swivel tube nut is securely connected to the stem in a process which is devoid of braising.
7. The method according to claim 1 , wherein the stem is formed from one solid piece of metallic material.
8. The method according to claim 1 , wherein the stem comprises barbs for sealingly engaging an inner diameter of a hose.
9. The method according to claim 1 further comprising sealingly securing a hose to the ferrule and the stem.
10. The method according to claim 9 further comprising sealingly securing a separate apparatus to the swivel tube nut.