Bow Shackles In Towbar? Or Eye Bolts?

[RAY185]

I'd like to put a couple of bow shackles through my towbar to use for recoveries. There are no real good spots for putting recovery hooks on the back of the 40. I'm thinking of drilling a couple of holes in the towbar frame to put the shackles though. Firstly does anyone see a problem doing this as far as safety goes? The Towbar is bolted via 4 high tensile bolts to the rear bumper/chassis and 6 high tensile bolts at 4 other points in the chassis. I would think its plenty strong. Secondly, can u get shackles that have an opening of 50mm to go over the 50mm towbar frame? I've only seen them up to 35mm but I'm sure there are bigger.

Hope the pic helps it make sense



Now open to suggestions of Eye Bolts and where to get them.
Cheers
Ray

[N*A*M]

can you drill your rear bar and use these: http://www.amazon.com/gp/browse.html/10 ... e=12938531

you can use a think backing plate to spread the load too

[Cossie]

cant see from the pic but is it a hayman reece type towbar with the 50mm square receiver?

[GV]

Just loop the snatch strap or winch cable over the towball - it's the easiest way to recover using a towbar. I've done this heaps of times and never had a problem.

[Pinball]

Just loop the snatch strap or winch cable over the towball - it's the easiest way to recover using a towbar. I've done this heaps of times and never had a problem.

DO NOT DO THIS!

remove the ball and place the "bolt" of the shackle through the tongue... but do not use the ball....

they have a habit of shearing off under snatch loads...

Spock

[RAY185]

Nam, yeah that was what I originally wanted but I couldnt find a supplier of eye bolts that had anything that was rated for recovery. Do you know of anywhere I can look? Someone once said to try a truck supplies place.

Cossie, I wish mate. I looked for a square hitch type towbar so I could just use the pin or even buy one of those recovery tongues with the shackle in it. Hayman Reece don't make the square hitch type anymore and I couldnt find a second hand one anywhere. So I'm stuck with this fixed tongue type towbar.

GV, no thanks mate.

Pinball, completely agree about the safety issue. I really want a permanent solution. I don't see myself unbolting the towball everytime I need to do a recovery. But yeah it would solve the problem if u got stuck.

[derelict_frog]

It woudl be beter if u joined them onto the bullbar right on top of where it bolts onto the chassis as u will definetly bend it if its in the middle of 2 sections bolting it to the chassis..

[shorty_f0rty]

Nam, yeah that was what I originally wanted but I couldnt find a supplier of eye bolts that had anything that was rated for recovery. Do you know of anywhere I can look? Someone once said to try a truck supplies place.

I think I saw some lifting eyes at "the bolt shop" on south pine rd alderly.. i THINK they were rated..

failing that you might have some success with Serafin Chains at Bowen Hills as they do wire rope, slings, etc they might have this sort of gear.

[RAY185]

Cheers shorty_fOrty. I rang Serafini chains. A 4 Tonne Eye Bolt was $166. Rang a few others and they are getting back to me on monday but one said I'd be looking at around $20 for a 4 tonne eye bolt.

What do u guys think about the rating? 4 Tonne should do the job with a nice thick plate behind it? Hmm, might even throw a couple on the front bar too at that price but then I would have a problem with cops because they stick out and can hurt someone.

[mickyd555]

i think you have to check the rating of the eye bolt again, i dont think the rating of 4 Tonne is for pulling against the nut, i think its more of a shear rating on the eye itself. i could be completely wrong on this, but im just going of what i have read on here b4.......

good luck

[N*A*M]

http://www.blackwoods.com.au/product_de ... ack_found=

[sudso]

Careful Ray185 of lifting eyebolts. They are strong but not intended for shock loads i.e.: snatch straps.

Also it has long been not recommended to use tow balls and tow bar tongues as snatch points as these have been known to shear (the welds as well) under shock load and find their way like a bullet into a vehicle and someones head. A bloke in a comp. from the USA died earlier this year as a result of this kind of recovery hitching.

For rear recovery I remove the tow hitch out of the sleeve and put the high tensile pin through the loop of the strap.

Proper recovery hooks can be bought from 4wd shops for about $20ea. and are bolted preferably to the chassis with high tensile bolts.

cheers

[GV]

I dunno why some people seem uptight about using the towball for recovery - I've been using it for years with no problems.

Anyway, another alternative for you is to effect recovery from the rear is to loop a tree protector around the chassis cross-member. Cross member will be plenty strong enough (after all, it is holding the towbar, isn't it). Just use a bow shackle to connect a snatch strap or winch cable to the tree protector.

[sudso]

I dunno why some people seem uptight about using the towball for recovery - I've been using it for years with no problems.

Who's uptight?
Like you, just sharing what I know that's all
cheers

[RAY185]

http://www.blackwoods.com.au/product_de ... ack_found=

$599 plus gst for the 15,000kg one. hmmm, nice looking thing but I don't think its quite in my budget for this millenium. Might price the 3200KG version. Again, can someone tell me what minimum rating I should go for here? I'm thinking 15,000kg is a bit of overkill but is 3200kg enough?


Sudso: Yeah, again, I agree completely with the towball thing. I dont have a square hitch towbar though so I cant use the pin for recoveries. My towbar tongue is bolted on permanently. I have no room for conventional recovery hooks on the back of my rig. Shackle hangers are in the way.

GV: Yeah I know there are a few "get you out of trouble" ways of doing a recovery for now if I need to but I am really trying to sort out a permanent fixture that I can rely on and is easy to effect. Throwing a strap around the crossmember would mean that the strap could potentially rub on some parts of the undercarriage depending on the angle of the pull and damage/cut the strap. Ok, if you really have to but not something I want to do everytime.

[Bad JuJu]

there is an 8000kg version too, if you are pricing them

http://www.blackwoods.com.au/product_de ... ack_found=

[Bluefreak]

I've seen a few places that eye-bolts are not the greatest units for recovery(shock loading)... My ARB rear bar has 2x2t eye-bolts, listed as rated recovery points... Does this mean if they fail, the onus is on them(ARB)...???

Not trying to hi-jack the post, just airing a concern in line with the discussions herein...

[zooki]

the 3.2ton is about $80 not stocked in Brisbane
http://www.blackwoods.com.au/product_de ... ack_found=

yes it would be enough, they are rated the same as a shackle so will hold at least 5 times that before breaking, the whole shock load thing is BS, lifting gear is rated to handle a certain load doesnt matter how that load is applied, whether its 3.2 ton lifted slowly or 3.2 ton of force from a 2ton 4x4 snatching.

IMHO creating a solid enough mount to the chassis that spreads the load is the real problem.

[RAY185]

ok, I've decided on the conventional Eye Bolt for this job. Those eye bolt plates sure are pretty but I can't justify the price. I picked these up for under $20 each from a chain supplier here in Brisbane. They are 2.5T Safe Working Load but have a breaking strength of 4 times that so I think 10 tonne should be plenty. Now I just have to drill 24mm holes in the rear bar to accept the eye bolts and cut up some nice thick plate to put behind them to spread the load.

[Toy80Diesel]

ok, I've decided on the conventional Eye Bolt for this job. Those eye bolt plates sure are pretty but I can't justify the price. I picked these up for under $20 each from a chain supplier here in Brisbane. They are 2.5T Safe Working Load but have a breaking strength of 4 times that so I think 10 tonne should be plenty. Now I just have to drill 24mm holes in the rear bar to accept the eye bolts and cut up some nice thick plate to put behind them to spread the load.

Ray I've got a couple of these on the bullbar of my 80.
They are rated as are yours. What I have done is put an 8mm plate behind it so they wont pull through, yet the bullbar is about 6 mm I think by memory. I installed them near the uprights, basically one on either side of where a winch would eventually sit. In an extreme case I would suggest joining a strap between the two, to equalise the stress between the two points, but for light recoveries one eye bolt has proven to work great on many occasions for me. Only thing I did was use Nylock nuts behind them.

[scout392]

[quote="zooki"]the 3.2ton is about $80 not stocked in Brisbane
http://www.blackwoods.com.au/product_de ... ack_found=

, the whole shock load thing is BS, lifting gear is rated to handle a certain load doesnt matter how that load is applied, whether its 3.2 ton lifted slowly or 3.2 ton of force from a 2ton 4x4 snatching.

quote]

Vehicle/Snatch-strap load impact (in ft./lbs. energy)

Speed Vehicle Weight (lbs)
(mph) 3,000 4,000 5,000 6,000 7,000
__________________________________________
5 2,506 3,341 4,177 5,012 5,847
10 10,024 13,365 16,707 20,048 23,389
15 22,554 30,072 37,590 45,108 52,626
20 40,096 53,462 66,827 80,192 93,558
30 90,216 120,289 150,361 180,435 210,505
50 250,604 334,135 417,669 501,207 584,736

Strap Capacities:
2" - 18,000
4" - 36,000
6" - 54,000
12"- 108,000

2.2 lbs to the kg

A Patrol or L/C is ?? 3t x 2.2 = 6600lbs@15mph= 45000lbs/2.2 is about 20t

Eric

[RAY185]

ok, holes drilled and test fitted, just have to get some plate behind them. Bar is about 5 or 6mm thick, I'll try and get some plate about 5mm or bigger behind it.

Eric, not sure what all that means to me. Do you think my eye bolts are not strong enough?

Toy80Diesel: Thanks for your input, I'll be buying an equaliser strap to use between the 2 eye bolts for sure.

[scout392]

Not trying to put a downer on your jub looks neat and tidy.

the info is to show people how much force a shatch can give. Up to 265t of course the snatch will breake before that.

Eric

[Ben]

I dunno why some people seem uptight about using the towball for recovery - I've been using it for years with no problems.

I'm sure lots of people use it for years without a problem. But then there's also a few people who no longer do it that way because there was a problem and they're dead.

The ball isn't designed for the stress loads you're putting it under - it might work, but FFS its not that hard to pull the tongue out...why risk it?

[BabyGodzillaGTi-R]

Pardon me for hijackng the thread, but how about just using a pintle hook for recovery purpose?

[scout392]

Pardon me for hijackng the thread, but how about just using a pintle hook for recovery purpose?

I have done that a few times

eric

[shorty_f0rty]

the 3.2ton is about $80 not stocked in Brisbane
http://www.blackwoods.com.au/product_de ... ack_found=

, the whole shock load thing is BS, lifting gear is rated to handle a certain load doesnt matter how that load is applied, whether its 3.2 ton lifted slowly or 3.2 ton of force from a 2ton 4x4 snatching.

Vehicle/Snatch-strap load impact (in ft./lbs. energy)

Speed Vehicle Weight (lbs)
(mph) 3,000 4,000 5,000 6,000 7,000
__________________________________________
5 2,506 3,341 4,177 5,012 5,847
10 10,024 13,365 16,707 20,048 23,389
15 22,554 30,072 37,590 45,108 52,626
20 40,096 53,462 66,827 80,192 93,558
30 90,216 120,289 150,361 180,435 210,505
50 250,604 334,135 417,669 501,207 584,736

Strap Capacities:
2" - 18,000
4" - 36,000
6" - 54,000
12"- 108,000

2.2 lbs to the kg

A Patrol or L/C is ?? 3t x 2.2 = 6600lbs@15mph= 45000lbs/2.2 is about 20t

Eric

if i understand all that correctly does that mean id have to find a eye bolt rated to 20tons for it to safely handle the shock load applied when snatching?

if the load is split between the bolts does this then mean that they only need to be rated to 10ton?

oh and by the way.. nice job Ray!

[scout392]

A Patrol or L/C is ?? 3t x 2.2 = 6600lbs@15mph= 45000lbs/2.2 is about 20t

Eric

if i understand all that correctly does that mean id have to find a eye bolt rated to 20tons for it to safely handle the shock load applied when snatching?

if the load is split between the bolts does this then mean that they only need to be rated to 10ton?

oh and by the way.. nice job Ray!

No, there would be 20t on everything from the bolts/welds that hold the bumper to the snatch to the bolts on the other 4b.

Dose any one know what is the breaking point on a snatch, is the rated number or is there a safety margin built in??

I don’t know what the correct eye bolt would be; I would get a larger one to be safe.

Dose any one know what a tow hook is rated at??

Eric

[scout392]

i found a hook @ http://www.bushranger.com.au/towhook.html

Tow Hook Universal $22.00
Part No: 59X00 5 Year 'No Fuss' Warranty
Attaches to vehicle chassis as a towing or recovery point
Drop forged, high strength steel to SWL rating (Safe Working Load) of 3.2 Tonne rating.

So i would get a eye bolt of 3.2t or bigger.

Eric