Decades ago, if I called something a clevis someone would correct me explaining it was a shackle. You can see where this is going. If I called something a shackle, I'd be told I was wrong, it was a clevis. About a week ago I asked CB if we could make this a 'Question Of The Day' as the current question about the quantity of dimmers has been up for many a moon. I was told my query could not be posted as a Question Of The Day as I couldn't provide an answer. Silly me! I didn't know a Question Of The Day couldn't be posted without a succinct / definitive answer.
Next I took my query to a friend of some 30 years who's spent at least the last two decades teaching college level millwrighting to folks apprenticing to become journeyman and / or Master millwrights. My associate provided two PDF's from his course of study but, in typical college fashion, I perceive them to be verbose and far from concisely definitive. I questioned my friend further and the more he looked into this, the more convoluted the differences and similarities become.
Thus my query: @egilson1, @Whatrigger, @derekleffew, @dvsDave, @skatersdad and @anyone else.
What are the definitive differences between a clevis and a shackle?
From the digging I've done thus far, here's where things seem to be heading:
It appears a clevis is a three piece coupling device with two parts attached / welded to items and only one loose, non-attached, piece with that piece being a clevis pin.
For example: You may find the female portion of a clevis welded to the frame of a tractor or caterpillar-tracked bull dozer and the male portion of a clevis permanently attached to the tongue of a trailing device; such as a cart, plow or tiller for instance with the only loose, readily removable, part of the clevis being the clevis pin.
Typically, the clevis is arranged to afford a reasonable amount of vertical movement or play and an appreciable amount of lateral movement. A shackle, on the other hand, appears to be a two (versus 3) part device with both parts loose / conveniently transportable, such as shackles often used to temporarily couple items used in rigging.
Some sources informed me that clevises had non-threaded clevis pins while shackles ALWAYS had threaded shackle pins although sufficient Googling appears to show both clevises and shackles with threaded and non-threaded pins.
Come one, come all. Please educate and elucidate this poor old blind geezer.
Toodleoo!
Ron Hebbard.
Next I took my query to a friend of some 30 years who's spent at least the last two decades teaching college level millwrighting to folks apprenticing to become journeyman and / or Master millwrights. My associate provided two PDF's from his course of study but, in typical college fashion, I perceive them to be verbose and far from concisely definitive. I questioned my friend further and the more he looked into this, the more convoluted the differences and similarities become.
Thus my query: @egilson1, @Whatrigger, @derekleffew, @dvsDave, @skatersdad and @anyone else.
What are the definitive differences between a clevis and a shackle?
From the digging I've done thus far, here's where things seem to be heading:
It appears a clevis is a three piece coupling device with two parts attached / welded to items and only one loose, non-attached, piece with that piece being a clevis pin.
For example: You may find the female portion of a clevis welded to the frame of a tractor or caterpillar-tracked bull dozer and the male portion of a clevis permanently attached to the tongue of a trailing device; such as a cart, plow or tiller for instance with the only loose, readily removable, part of the clevis being the clevis pin.
Typically, the clevis is arranged to afford a reasonable amount of vertical movement or play and an appreciable amount of lateral movement. A shackle, on the other hand, appears to be a two (versus 3) part device with both parts loose / conveniently transportable, such as shackles often used to temporarily couple items used in rigging.
Some sources informed me that clevises had non-threaded clevis pins while shackles ALWAYS had threaded shackle pins although sufficient Googling appears to show both clevises and shackles with threaded and non-threaded pins.
Come one, come all. Please educate and elucidate this poor old blind geezer.
Toodleoo!
Ron Hebbard.