An overhaul hook ball, also known as an overhaul ball or headache ball, is a heavy weight that is attached to the end of a crane's cable, above the lifting hook. It is used to keep the cable under sufficient tension even when no load is attached.[1][2][3] Although commonly spherical as the name suggests, overhaul balls may also be ellipsoidal or cylindrical.
Overhaul balls should be distinguished from wrecking balls, which although superficially similar looking, are different and serve a different purpose.
References edit
- ^ "What is a Headache Ball? | All Lifting". www.alllifting.com.au. Retrieved 2023-10-17.
- ^ "Headache Ball AKA Overhaul Hook Balls". www.edtengineers.com. 2019-01-31. Retrieved 2023-10-17.
- ^ "Incident Investigation Report: Overhaul ball falls from crane, striking worker". worksafebc.ca. June 2005. Retrieved 2023-10-17.
 | This engineering-related article is a stub. You can help Wikipedia by expanding it. |