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Tips for Rigging with Eye Bolts
Rigging | Safety and Training | By Columbus McKinnon Training | Jan 16, 2018
Jubal, an entertainment rigger from Local One IATSE and Columbus McKinnon safety webinar attendee, asked the following rigging question about eye bolts:
“Is it necessary to use only one washer when securing eye bolts or can the washers be stacked if necessary?”
Peter Cooke, Columbus McKinnon Training Manager, and Safety Webinar Presenter, answers:
If more than one washer is necessary, the eyebolt may need to be turned to align with the rigging. Please see the example below.
A shim can be added to reposition the orientation of the eyebolt. Most importantly, you must maintain proper engagement or tightness. A shim can vary in thickness depending on how you need to align the eyebolt, as when a 3/8 eyebolt with 16 thread per inch is used. With 16 threads per inch, one turn would relate to .062” of movement into the mounting plate. If we divide this by 4 to get .0156” for our shim, the result will be a change in rotational position of the eyebolt of 90 degrees, which can be used as a reference dimension for adjusting the spacer on the eyebolt to achieve the proper orientation with the load.
For a more in-depth overview, view our safety webinar on the Safe Use of Lift Points:
Columbus McKinnon Training
Articles authored by "Columbus McKinnon Training" were written by industry professionals with decades of unique and in-depth experience in the material handling industry who are no longer employed by Columbus McKinnon.
