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Low Earth Orbit
Pro AV, Staging, & Rigging
Shoulder Eye-Bolts: washer or not?
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<blockquote data-quote="Mark Cadwallader" data-source="post: 96284" data-attributes="member: 3468"><p>Re: Shoulder Eye-Bolts: washer or not?</p><p></p><p></p><p></p><p>They would be tiny little bastards of a washer. It would be easier to turn them on a lathe with a flat washer surface attached to the cone-shaped spacer. It also occurs to me that in order to work right, the tolerance of the cone would have to be +0/- something in order to work. I don't know that speaker mfgs have close enough tolerances to not have the shoulder of the eye bolt bottoming out on the conical washer instead of the cabinet. There are rated machinery lifting swivel eyes for non-vertical lifts, but IIRC the price is about $70+ each. Not very cost efficient for a single speaker, given the over-engineering (high safety factor) for "regular" forged eyebolts on most single speakers. Mark C.</p></blockquote><p></p>
[QUOTE="Mark Cadwallader, post: 96284, member: 3468"] Re: Shoulder Eye-Bolts: washer or not? They would be tiny little bastards of a washer. It would be easier to turn them on a lathe with a flat washer surface attached to the cone-shaped spacer. It also occurs to me that in order to work right, the tolerance of the cone would have to be +0/- something in order to work. I don't know that speaker mfgs have close enough tolerances to not have the shoulder of the eye bolt bottoming out on the conical washer instead of the cabinet. There are rated machinery lifting swivel eyes for non-vertical lifts, but IIRC the price is about $70+ each. Not very cost efficient for a single speaker, given the over-engineering (high safety factor) for "regular" forged eyebolts on most single speakers. Mark C. [/QUOTE]
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