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Rifles, Reloading, Optics, Equipment
Gunsmithing
from Lathe to Production Machine
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<blockquote data-quote="shortgrass" data-source="post: 545441" data-attributes="member: 24284"><p>The B&S single spindle is probably considered obsolete, should be an easy find. Probably been thousands sold for scrap, by now. I 've not had nearly the experience with them as I have with multiple spindle automatics (Acme-Gridley). At production speeds we were able to hold tolerances of +.001/-.000. That was 30 years ago using high speed tooling and massive amounts of cutting oil under alot of pressure (close the guards before starting, or take an oil bath). By slowing feed rates a bit, one my hold closer tolerances. The key is in the tooling and the set-up. High quality material plays a part, too. Much of the 'tight tolerence' stuff we did then was made using material from "Latrobe Steel Specialties", don't even know if they're still in business or not. Depends on what parts you are making, and tolerances required whether an 'old fashioned screw machine' will meet your requirements. They were the mass producer of their day. But, there's no doubt about it, extensive knowledge of tooling, speeds & feeds, and the mechanics of the machine are <em>required!</em> There is no computer to do your thinking for you!</p></blockquote><p></p>
[QUOTE="shortgrass, post: 545441, member: 24284"] The B&S single spindle is probably considered obsolete, should be an easy find. Probably been thousands sold for scrap, by now. I 've not had nearly the experience with them as I have with multiple spindle automatics (Acme-Gridley). At production speeds we were able to hold tolerances of +.001/-.000. That was 30 years ago using high speed tooling and massive amounts of cutting oil under alot of pressure (close the guards before starting, or take an oil bath). By slowing feed rates a bit, one my hold closer tolerances. The key is in the tooling and the set-up. High quality material plays a part, too. Much of the 'tight tolerence' stuff we did then was made using material from "Latrobe Steel Specialties", don't even know if they're still in business or not. Depends on what parts you are making, and tolerances required whether an 'old fashioned screw machine' will meet your requirements. They were the mass producer of their day. But, there's no doubt about it, extensive knowledge of tooling, speeds & feeds, and the mechanics of the machine are [I]required![/I] There is no computer to do your thinking for you! [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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