Would scaffolding swivel be strong enough for hoist ?

[CompoSimmonite]

Due to diminished strength I use all sorts of devices to still be able to play with my toys
One such device is a small electric hoist (Aldi or Lidl special) like this which is attached to the hefty carport frame (which is made out of scaffolding and KeeKlamps so easily can take the strain) -

I need to make a more adaptable way of mounting so it'll swivel in different directions for lifting anywhere via the snatch block and am thinking of making one out of a swivel scaffolding fitting.
I've got some cast iron types like this -

Do you think the centre pin is strong enough for use as a swivel ? It wouldn't be swiveled under load - only when unloaded and cable being routed to where ever the snatch block is attached. There would, however, be sideways load on the pin.

Cheers.

Paul H

 

[awemawson]

I hope it's not cast iron or it will definitely fail due to the very low tensile strength of cast iron. Hopefully at least malleable iron but preferably forged steel considering how scaffolding gets used. Centre pin will almost certainly be a mild steel so given it's diameter google will give you it's shear strength, but personally I'd want to test one to at least three times the expected load before dangling anything expensive on it !

(That fitting looks to have been drop forged)

 

[Gritineye]

They aren't designed to take a straight pull on the swivel pin, only for diagonal sheer loads.

 

[Kent]

when it comes to lifting stuff better not to think outside the box IMO. It can all go badly wrong in half the blink of an eye

 

[CompoSimmonite]

I hope it's not cast iron or it will definitely fail due to the very low tensile strength of cast iron. Hopefully at least malleable iron but preferably forged steel considering how scaffolding gets used. Centre pin will almost certainly be a mild steel so given it's diameter google will give you it's shear strength, but personally I'd want to test one to at least three times the expected load before dangling anything expensive on it !

(That fitting looks to have been drop forged)

On a spare fitting I wanted to separate the two parts so drilled the centre pin. Even 15mm drill bit didn't do the job so suspect it's something like 17-18mm dia. The original hoist saddle clamps (mine are for round tube and not square like picture above) are 3mm steel with 8mm attachment bolts.

 

[sardine]

I have lifted Diesel engines on two crossed scaffold poles with the same swivel clamp, and chain hoist around the clamp.

 

[awemawson]

I have lifted Diesel engines on two crossed scaffold poles with the same swivel clamp, and chain hoist around the clamp.

Frog diesels from a model plane, or monsters from an ocean going vessel

 

[roofman]

ive lifted 100KG on my scaffolds with the same joint,dont think it was cast iron though...more like steel

 

[sardine]

Frog diesels from a model plane, or monsters from an ocean going vessel

Lister HA3 - 800lb

The bottom of the tubes had angle bases welded on, and they locked into the gunwales of a boat. The clamp was pressed steel.

 

[the snooper]

you can buy a swivel shackle for a tenner with a break load of 1700kg not worth the risk for a tenner