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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.
=20
https://torontotrailers.com/what-you-need-to-know-about-working-load-limi=
ts-of-chains/=20
The Facts About Working Load Limit
A chain=E2=80=99s 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.=20
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=E2=80=99s weight. The chain must manage the =
applied tension.=20
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=E2=80=99s weight as well as any added forces from the hitch =
types and angles used.
* A chain=E2=80=99s WLL is the maximum tension that can be placed on an =
undamaged or brand new chain. The WLL=E2=80=99s rated capacity is shown =
in pounds.
* The WLL is computed by dividing the chain=E2=80=99s minimum breaking =
strength by its assigned safety factor rating.
* The chain=E2=80=99s WLL is determined by its diameter and grade.
* Factors that affect a chain=E2=80=99s WLL is constant wear, use, =
twists, alteration, corrosion, misuse.=20
* 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=E2=80=99s 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.
=20
Alex Thomson
'73 TR6
Full line of tractors and hay equipment.
=20
=20
=20
From: Triumphs <triumphs-bounces@autox.team.net> On Behalf Of Sujit Roy
Sent: Wednesday, August 14, 2024 1:45 PM
To: Triumphs <triumphs@autox.team.net>
Subject: -- SPAM -- [TR] advice needed on chains for pulling engine
=20
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?
=20
Sujit =20
=20
--=20
Sujit Roy
Cupertino, California
https://triumphstagblog.wordpress.com/
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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue =
vlink=3Dpurple style=3D'word-wrap:break-word'><div =
class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;color:#1F497D'>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.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;color:#1F497D'><o:p> </o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-size:14.0pt;color:#1F497D'><a =
href=3D"https://torontotrailers.com/what-you-need-to-know-about-working-l=
oad-limits-of-chains/">https://torontotrailers.com/what-you-need-to-know-=
about-working-load-limits-of-chains/</a> <o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:9.0pt;margin-right:0in;margin-bottom:6.0pt;ma=
rgin-left:0in;mso-line-height-alt:14.4pt;background:white'><span =
style=3D'font-size:22.5pt;font-family:Raleway;color:#181B31'>The Facts =
About Working Load Limit<b><o:p></o:p></b></span></p><p =
class=3DMsoNormal style=3D'margin-bottom:15.0pt;background:white'><span =
style=3D'font-size:12.0pt;font-family:Raleway;color:#737373'>A =
chain=E2=80=99s 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. <o:p></o:p></span></p><p =
class=3DMsoNormal style=3D'margin-bottom:15.0pt;background:white'><span =
style=3D'font-size:12.0pt;font-family:Raleway;color:#737373'>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=E2=80=99s weight. The chain must manage the =
applied tension. <o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'margin-bottom:15.0pt;background:white'><span =
style=3D'font-size:12.0pt;font-family:Raleway;color:#737373'>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=E2=80=99s weight as well as any added forces from the hitch types =
and angles used.<o:p></o:p></span></p><ul type=3Ddisc><li =
class=3DMsoNormal =
style=3D'color:#737373;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto=
;mso-list:l0 level1 lfo1;background:white'><span =
style=3D'font-size:12.0pt;font-family:Raleway'>A chain=E2=80=99s WLL is =
the maximum tension that can be placed on an undamaged or brand new =
chain. The WLL=E2=80=99s rated capacity is shown in =
pounds.<o:p></o:p></span></li><li class=3DMsoNormal =
style=3D'color:#737373;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto=
;mso-list:l0 level1 lfo1;background:white'><span =
style=3D'font-size:12.0pt;font-family:Raleway'>The WLL is computed by =
dividing the chain=E2=80=99s minimum breaking strength by its assigned =
safety factor rating.<o:p></o:p></span></li><li class=3DMsoNormal =
style=3D'color:#737373;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto=
;mso-list:l0 level1 lfo1;background:white'><span =
style=3D'font-size:12.0pt;font-family:Raleway'>The chain=E2=80=99s WLL =
is determined by its diameter and grade.<o:p></o:p></span></li><li =
class=3DMsoNormal =
style=3D'color:#737373;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto=
;mso-list:l0 level1 lfo1;background:white'><span =
style=3D'font-size:12.0pt;font-family:Raleway'>Factors that affect a =
chain=E2=80=99s WLL is constant wear, use, twists, alteration, =
corrosion, misuse. <o:p></o:p></span></li><li class=3DMsoNormal =
style=3D'color:#737373;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto=
;mso-list:l0 level1 lfo1;background:white'><span =
style=3D'font-size:12.0pt;font-family:Raleway'>Chains must be inspected =
regularly to make sure it is safe to use.<o:p></o:p></span></li><li =
class=3DMsoNormal =
style=3D'color:#737373;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto=
;mso-list:l0 level1 lfo1;background:white'><span =
style=3D'font-size:12.0pt;font-family:Raleway'>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.<o:p></o:p></span></li><li class=3DMsoNormal =
style=3D'color:#737373;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto=
;mso-list:l0 level1 lfo1;background:white'><span =
style=3D'font-size:12.0pt;font-family:Raleway'>The WLL is a quarter or a =
fifth of the chain=E2=80=99s breaking strength. When a ratchet with a =
chain is used, the WLL is the lowest rating of the components =
utilized.<o:p></o:p></span></li></ul><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;color:#1F497D'>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.<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:14.0pt;color:#1F497D'><o:p> </o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-size:14.0pt;color:#1F497D'>Alex =
Thomson<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt;color:#1F497D'>'73 TR6<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-size:14.0pt;color:#1F497D'>Full =
line of tractors and hay equipment.<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:14.0pt;color:#1F497D'><o:p> </o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:14.0pt;color:#1F497D'><o:p> </o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:14.0pt;color:#1F497D'><o:p> </o:p></span></p><div=
style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in'><p class=3DMsoNormal><b>From:</b> Triumphs =
<triumphs-bounces@autox.team.net> <b>On Behalf Of </b>Sujit =
Roy<br><b>Sent:</b> Wednesday, August 14, 2024 1:45 PM<br><b>To:</b> =
Triumphs <triumphs@autox.team.net><br><b>Subject:</b> -- SPAM -- =
[TR] advice needed on chains for pulling engine<o:p></o:p></p></div><p =
class=3DMsoNormal><o:p> </o:p></p><div><div><p =
class=3DMsoNormal>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?<o:p></o:p></p></div><div><p =
class=3DMsoNormal>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?<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p> </o:p></p></div><div><p =
class=3DMsoNormal>Sujit <o:p></o:p></p></div><p =
class=3DMsoNormal><br clear=3Dall><o:p></o:p></p><div><p =
class=3DMsoNormal><o:p> </o:p></p></div><p class=3DMsoNormal><span =
class=3Dgmailsignatureprefix>-- </span><o:p></o:p></p><div><div><div><p =
class=3DMsoNormal>Sujit Roy<br>Cupertino, =
California<o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'><br><a =
href=3D"https://triumphstagblog.wordpress.com/"; =
target=3D"_blank">https://triumphstagblog.wordpress.com/</a><o:p></o:p></=
p></div></div></div></div></div></body></html>
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