[TR] -- SPAM -- advice needed on chains for pulling engine

[Alex&Janet Thomson]

You can get the low-down on chain types here from Toronto Trailers. It's a good but fairly long introduction so I will copy/paste just one section.

 

https://torontotrailers.com/what-you-need-to-know-about-working-load-limits-of-chains/ 

The Facts About Working Load Limit

A chain’s working load limit (WLL) is used as a safety measure to identify the chains which are sufficiently strong for overhead lifting. The process of lifting a load could be lethal especially if the incorrect equipment is used. 

Moving a heavy load across the ground is beneficial as the ground helps support the load. The coefficient of friction must be overcome in order to effortlessly move the load. Also, the working load limit of the chain needs to match the load’s weight. The chain must manage the applied tension. 

Once the load is lifted off the ground, gravity must be overcome. The working load limit of the chain must be sufficiently strong to support the load’s weight as well as any added forces from the hitch types and angles used.

*	A chain’s WLL is the maximum tension that can be placed on an undamaged or brand new chain. The WLL’s rated capacity is shown in pounds.
*	The WLL is computed by dividing the chain’s minimum breaking strength by its assigned safety factor rating.
*	The chain’s WLL is determined by its diameter and grade.
*	Factors that affect a chain’s WLL is constant wear, use, twists, alteration, corrosion, misuse. 
*	Chains must be inspected regularly to make sure it is safe to use.
*	The WLL is different from the tensile or breaking strength. Chain manufacturers set the WLL to determine the maximum force that can be used on the product.
*	The WLL is a quarter or a fifth of the chain’s breaking strength. When a ratchet with a chain is used, the WLL is the lowest rating of the components utilized.

I can tell you from experience that the results of a broken chain used for overhead lifting is not pretty! Don't forget that fasteners on an engine, such as 3/8" bolts, also have a limited capacity.

 

Alex Thomson

'73 TR6

Full line of tractors and hay equipment.

 

 

 

From: Triumphs <triumphs-bounces at autox.team.net> On Behalf Of Sujit Roy
Sent: Wednesday, August 14, 2024 1:45 PM
To: Triumphs <triumphs at autox.team.net>
Subject: -- SPAM -- [TR] advice needed on chains for pulling engine

 

Lets say I have a 1000lb engine. Will I be able to lift this engine from one point on the engine and one point on the engine hoist?

Now, if I lift the same engine from 4 points, and one point on the engine hoist, can I get away with using a chain rated at 250 lb?

 

Sujit  




 

-- 

Sujit Roy
Cupertino, California


https://triumphstagblog.wordpress.com/

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