Bow Shackles: Still the best!
- XJ Junkie
- Location: Cape Town
- Been thanked: 1 time
- Posts: 1599
- Joined: Sun Apr 01, 2018 2:47 pm
- Contact:
Bow Shackles: Still the best!
I found this great video where they did destruction tests on rated bow shackles, soft yuppie shackles & unrated shackles.
The unrated shackle shat the bed with a load of 4485 kg.
The 8000 kg soft shackle broke at just above it’s rating, 9327 kg
But our favourite & old faithful 4.75T rated bow shackle only gave up at a massive 35219 kg
It just goes to show that the wheel doesn’t need to be reinvented.
https://youtu.be/66BXmM_JuBI
The unrated shackle shat the bed with a load of 4485 kg.
The 8000 kg soft shackle broke at just above it’s rating, 9327 kg
But our favourite & old faithful 4.75T rated bow shackle only gave up at a massive 35219 kg
It just goes to show that the wheel doesn’t need to be reinvented.
https://youtu.be/66BXmM_JuBI
Last edited by XJ Junkie on Sun Nov 04, 2018 5:37 pm, edited 1 time in total.
Disclaimer: Uninformed, no research, just very strong opinions
- Chris Stoffel
- Location: Cape Town
- Posts: 555
- Joined: Sun Apr 01, 2018 9:54 pm
4485Kg is actually a lot. Is that not good enough for our needs?
Suzuki Jimny - Hobbit Car
-
- Location: Cape Town
- Has thanked: 43 times
- Been thanked: 81 times
- Posts: 1460
- Joined: Sun Apr 08, 2018 7:22 am
Thanks for the info
I would not use an un rated shackle, but I am pleasantly surprised with the soft shackles. I can keep them in my recovery bag then
I would not use an un rated shackle, but I am pleasantly surprised with the soft shackles. I can keep them in my recovery bag then
2017 Land Cruiser 200
2022 Corolla Cross (Yes. It's a Hybrid)
BushLapa Ratel nr 731
2022 Corolla Cross (Yes. It's a Hybrid)
BushLapa Ratel nr 731
- XJ Junkie
- Location: Cape Town
- Been thanked: 1 time
- Posts: 1599
- Joined: Sun Apr 01, 2018 2:47 pm
- Contact:
No, it’s not nearly enough. Mainly because your recovery strap is likely to be rated at 8000 kg or more, which is nearly double the breaking point of that likely projectile.Chris Stoffel wrote:4485Kg is actually a lot. Is that not good enough for our needs?
Disclaimer: Uninformed, no research, just very strong opinions
- XJ Junkie
- Location: Cape Town
- Been thanked: 1 time
- Posts: 1599
- Joined: Sun Apr 01, 2018 2:47 pm
- Contact:
I’m still skeptical. What snatch rope rating are you using with the Cruiser? 12T? It’ll fail before the strap which isn’t desirable.Mike Nel wrote: I am pleasantly surprised with the soft shackles. I can keep them in my recovery bag then
Whats the Cruisers GVM?
Disclaimer: Uninformed, no research, just very strong opinions
-
- Location: Cape Town
- Has thanked: 43 times
- Been thanked: 81 times
- Posts: 1460
- Joined: Sun Apr 08, 2018 7:22 am
Now that you mention it. My strap is rated at 8Tons which I bought initially for the FJ. The T6 had a 12Ton strap which we used a lot recovering Toyotas. I never replaced it when I got rod of itXJ Junkie wrote: ↑Sun Nov 04, 2018 5:57 pmI’m still skeptical. What snatch rope rating are you using with the Cruiser? 12T? It’ll fail before the strap which isn’t desirable.Mike Nel wrote: I am pleasantly surprised with the soft shackles. I can keep them in my recovery bag then
Whats the Cruisers GVM?
I do need a new strap for the Cruiser. Its GVM is roughly 3500kg’s
2017 Land Cruiser 200
2022 Corolla Cross (Yes. It's a Hybrid)
BushLapa Ratel nr 731
2022 Corolla Cross (Yes. It's a Hybrid)
BushLapa Ratel nr 731
-
- Location: Cape Town
- Has thanked: 43 times
- Been thanked: 81 times
- Posts: 1460
- Joined: Sun Apr 08, 2018 7:22 am
Add on to the post above
I would rather have a strap and soft shackle coming back at me than a bow shackle
But. Rather make sure you have the right equipment for your vehicle
Thanks for the reminder Neil
I would rather have a strap and soft shackle coming back at me than a bow shackle
But. Rather make sure you have the right equipment for your vehicle
Thanks for the reminder Neil
2017 Land Cruiser 200
2022 Corolla Cross (Yes. It's a Hybrid)
BushLapa Ratel nr 731
2022 Corolla Cross (Yes. It's a Hybrid)
BushLapa Ratel nr 731
- XJ Junkie
- Location: Cape Town
- Been thanked: 1 time
- Posts: 1599
- Joined: Sun Apr 01, 2018 2:47 pm
- Contact:
But it’ll still have the strap connected to it when it snapsMike Nel wrote:
I would rather have a strap and soft shackle coming back at me than a bow shackle
Disclaimer: Uninformed, no research, just very strong opinions
- XJ Junkie
- Location: Cape Town
- Been thanked: 1 time
- Posts: 1599
- Joined: Sun Apr 01, 2018 2:47 pm
- Contact:
With any recovery system there has to be a weak point, i.e, the part in the chain that is likely to break first.
Personally, I want it to be the strap. Not the recovery point or the shackle.
Bow shackles actual breaking points are considerably higher than their rating.
Recovery straps/ropes need to be rated at around x2.5 times the GVM of the lighter vehicle in the recovery chain. But using a greater rating strap on a lighter vehicle will interfere with the kinetic properties. That’s why i just use 8T straps.
Personally, I want it to be the strap. Not the recovery point or the shackle.
Bow shackles actual breaking points are considerably higher than their rating.
Recovery straps/ropes need to be rated at around x2.5 times the GVM of the lighter vehicle in the recovery chain. But using a greater rating strap on a lighter vehicle will interfere with the kinetic properties. That’s why i just use 8T straps.
Disclaimer: Uninformed, no research, just very strong opinions
- Apocalypse
- Location: Cape Town
- Posts: 809
- Joined: Sun Apr 01, 2018 2:40 pm
Very very nice research - about time it was done. I’ve actusllh been threatening it myself for a while .
A SWL rated component is covered by the OHS act. A steel link (chain / shackle ) have to have an actual breaking strain of 6 times it’s rating. Fibre stuff (slings) is 10 times. So I’d expect a rated 4,75 ton shackle to exceed 28,5tons of force before breaking .
But it does make the point - don’t buy cheap rubbish.
F=ma.
A SWL rated component is covered by the OHS act. A steel link (chain / shackle ) have to have an actual breaking strain of 6 times it’s rating. Fibre stuff (slings) is 10 times. So I’d expect a rated 4,75 ton shackle to exceed 28,5tons of force before breaking .
But it does make the point - don’t buy cheap rubbish.
F=ma.
Quis custodiet ipsos custodes
-
- Location: Cape Town
- Has thanked: 5 times
- Been thanked: 1 time
- Posts: 402
- Joined: Tue Apr 03, 2018 2:41 pm
So, on the landy an 8T snatch rope will be good?
Sent from my SM-G920F using Tapatalk
Sent from my SM-G920F using Tapatalk
Could this be sarcasm?
- grips
- Location: kathu
- Has thanked: 53 times
- Been thanked: 139 times
- Posts: 1170
- Joined: Tue Apr 03, 2018 5:08 am
Good thread thanks Neil. There were a case while back on one of the I do work for where a company supplied cheap rated shackles. These failed in a lifting operation , luckily no one were injured. They have put a system in place where all new lifting equipment have to undergo stress tests before allowed being used.
You will never find me without Stroh or a 4x4