Tech Talks

Gene writes:  “I am not seeing eye to eye with my customer on a bridge crane alarm issue. His claim is that the warning device must be an alarm (sound) and that it should be continuously on when the bridge is traveling.  The standard he is referencing is ANSI B30.2 (1967) with the claim that […]

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Have you ever rigged a bundled load only to have that load spill out once your sling went slack?  The  solution is the CM Bundling Clip, which prevents the choker from going slack and the load from spreading after being unhooked. It also eliminates shear points and damage to wire rope. Check out our latest video and […]

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This is a great opportunity for Modex (Atlanta, GA February 6-8, 2012) attendees to learn more about our recently-launched products. Our “Shop Talk” presentations and hands-on demonstrations are hosted by CMCO product experts who will walk you through the key features of our spotlighted products, and will show you their benefits.  CM Lodestar Electric Chain Hoist […]

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Bill writes: I keep running into the question “How do we complete the annual PM (preventative maintenance) per the manual unless we open up the gear box and inspect the internals?”  This question is centered around the annual inspection task to inspect “Load Bearing Parts.”  Item 3 on the annual inspection of a CEW Hoist states: […]

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National Association of Chain Manufacturers (NACM), representing domestic manufacturers of welded and weldless chain since 1933, has conducted D/d testing on alloy chain. D/d is the ratio between the curvature taken by the sling D, and the diameter of the component chain d. NACM alloy chain manufacturers supplied Grade 100: 9/32”, 3/8” and ½” and […]

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A customer asks: “Can a Hammerlok coupling link be used to repair hoist chain?” Peter answers: Mechanical coupling links such as Hammerloks should not be used to join hoist load chain together. This presents a number of safety hazards to the operator and can cause possible damage to the hoist. Hoist load chain when damaged, […]

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The project engineer thought that he had an impossible task. When contacting virtually every hoist manufacturer he could find, this project engineer at an East Coast (U.S.) nuclear power plant was repeatedly told that his application requirements were “unworkable”. The project required a 16-ton capacity hoist and trolley that could be operated manually by one […]

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Eyebolts are safe to use if used properly. I have seen the misuse of eyebolts in every walk of life –  industrial, recreational & residential – and it is frightening. I have seen eyebolts used in rigging applications, carrying large loads, being used incorrectly; they are sometimes used on pick-up trucks as attachments for safety […]

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  A customer calls in and asks, “Why must I have double shoe collectors on my crane? The National Electric Code (NEC) does not call for it.” Larry answers: CMAA Specifications 70 and 74 require double shoe collectors when variable frequency control (vfc) is used in any motion of a crane. Article 610 of the […]

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Abraham writes: “How do you calculate the stopping distance of a bridge crane to see if you meet the OSHA standards? I need help determining if our bridge cranes are traveling too far after we release the travel button on the remote control.“ Tom answers: Both OSHA 1910.179 and ASME B30 publish standards which address […]

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