homemade recovery point





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  1. #1

    Default homemade recovery point

    Hi

    Will a 50x6 flat bar with a 10mm hole in be strong enough? It will be bolted on to the factory holes in the chassis of my pajero?

    Any Advice will help me a lot as I want to make them now for tomorrow.

    Edit: would horizontal / vertical hole matter?
    Regards
    Ride 1 (For Playing)
    1999 4L V8 SWB Payota or Toyjero

    Ride 2 (For Trips)
    1999 3.5L V6 SWB Pajero

  2. #2
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    Default

    howzit.
    that recovery point will be plenty strong enough, but a 10mm hole wont be bigger enough,some of those shackle pins are 12 or 14 mm thick.
    when we recovered the patrol we had to find a small shackle as both mine and dvr`s shackles were too big for the hole in the patrols recovery point.
    see you sunday.
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  3. #3
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    Default

    I seriously hope you are joking about using a 10mm, 12mm or even 14mm shackle!!! A shackle with an 11mm pin is rated at 1ton and even after taking the safety factor of 6 into account it is still 2 tons short of your standard 8 ton snatch strap.

    It's recommended that you use at least a 3.25ton bow shackle with a 19mm pin, but rather be safe and go for a 4.75ton with a 22mm pin.

    A 50x6 flatbar will NOT be sufficient, especially if you want to still drill a hole for the shackle in it.

    Here's a recovery point I did a few years ago for an Isuzu bakkie and after doing stress analysis on the recovery point I found that this is the minimum size you can do for use with a snatch strap with an 8ton breaking point. That is a 12mm thick piece of steel.







    If you want to use flatbar and drill a hole in it, go for at least a 60x12 flatbar. Attaching it securely to the chassis with correctly rated bolts is another science on it's own....no point in having a strong recovery point, which will just tear the nuts out of the chassis.

    Please people, this forum has many threads where people have been injured or died when recovery points broke. You are playing with your lives by fitting insufficient recovery points. Regardless of how strong your recovery points are, always remember to also use safety straps and use them in the correct way.
    Last edited by Barto; 2009/10/28 at 10:04 AM.

  4. #4
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    Default

    Zantus, I agree.

    Please go overkill.

    Also make sure that what you are tying onto is "solid" enough. Else you will be on the receiving end.
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  5. #5
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    Default

    A while ago I picked up a few lengths of +- 80 X 14 flat bar at the scrap metals. I'm sure this will do the job and allow for big enough holes for 22mm (pin diameter) shackles. What do you think will be enough holes (bolts) per side through the chassis beams to attach them and use safely as recovery points. The bumper and towbar will also go onto this.

    The flat bars are long enough to let them go deep into the chassis channel. The deeper they go, the better.

    Will 5 holes per side (with 8.8 bolts) do the job?
    Last edited by KobusDJ; 2009/10/24 at 06:27 PM.
    Kobus

    Nissan

  6. #6

    Default

    Ok this is the finished product before a coat of paint. I only had 60x20 flat. shackle hole is 20mm and bolts 14mm high tensile 8.8 with metric fine thread.
    will use some locktite (the blue one) to keep them fastened.

    This is strong enough ( I hope )
    Attached Images Attached Images  
    Ride 1 (For Playing)
    1999 4L V8 SWB Payota or Toyjero

    Ride 2 (For Trips)
    1999 3.5L V6 SWB Pajero

  7. #7
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    Default

    My experience:

    An 8th flat x 60 wide was strong enough through many hard snatches with the G-wagen. The shackle hole was 22dia for a 20dia shackle. I never use anything thinner, they tend to bend, and then they won't turn out/loose. It was bolted to the chassis with 1x M16 Gr8.8 bolt & nut, in tensile and not shear mode.

    You can go stronger, but it will only be for peace of mind.

  8. #8
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    Default

    Kobus, 5 bolts per side will be great!

    Ernie, that looks like it will do the job. Just be careful of pulling at too much of an angle that could rip the nuts from the chassis.

  9. #9

    Default

    Thanx for the advice Zantus and Henris. When I build my bumpers I will reinforce the chassis and put the recovery point on the bumper. So I am correct in saying the factory fitted recovery points is only good for towing home/where ever and not for offroad/snatch recoveries.

    Edit: I don't have a 22mm drill. 20 was the biggest I had.

    Thanx again.
    Ride 1 (For Playing)
    1999 4L V8 SWB Payota or Toyjero

    Ride 2 (For Trips)
    1999 3.5L V6 SWB Pajero

  10. #10
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    Default

    It depends, some manufacturers actually make an effort to make their recovery points strong. Others are just there to strap the vehicle down during transport.

  11. #11

    Default

    Finshed and fitted. I know it is dark but it is the best I could do now.
    Attached Images Attached Images  
    Ride 1 (For Playing)
    1999 4L V8 SWB Payota or Toyjero

    Ride 2 (For Trips)
    1999 3.5L V6 SWB Pajero

  12. #12
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    Default

    Lyk goed wys asb more vir my waar ek vir myne op die Patrol kan sit. ASB
    Mazda BT 50
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  13. #13
    DVR Guest

    Default

    Ernie have you got a recovery in mind for the next day or two

  14. #14

    Default

    OK. Ek sal.
    Ride 1 (For Playing)
    1999 4L V8 SWB Payota or Toyjero

    Ride 2 (For Trips)
    1999 3.5L V6 SWB Pajero

  15. #15
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    Default

    Quote Originally Posted by creepyjeep View Post
    howzit.
    that recovery point will be plenty strong enough, but a 10mm hole wont be bigger enough,some of those shackle pins are 12 or 14 mm thick.
    when we recovered the patrol we had to find a small shackle as both mine and dvr`s shackles were too big for the hole in the patrols recovery point.
    see you sunday.
    Steve remind me tomorrow to show you how a ruler work You had me worried there for a moment the bow shackel pin that we used to recover my patrol is almost 20mm and a rating of 3.25 tons strong enough.( I just measured everything)
    Mazda BT 50
    2013 auto 3.2 4x4
    (aka Mazdarati)
    Towing our moblie home
    Imagine Comfortvan

    Don't get confused between my personality & attitude. My Personality is who I AM, my attitude depends on who YOU are!!!

  16. #16
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    Default

    [QUOTE=Zantus;370790]

    QUOTE]

    Safari Centre PTA East sell a lug that looks simmilar out of 10mm plate.
    I fitted two to the front of my Disco2. Will have to redo them as I botched the drilling and cant get a big D schakle in.
    Will post photos this weekend.

    Disco 2 TD5 XS
    Disco 2 V8 XS
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  17. #17
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    Default

    Ernie quick question. You mentioned that you used a 60x20 flat bar but what thickness is the bar? What is the minimum thickness?

  18. #18
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    Quote Originally Posted by SWEETLIPS View Post
    Ernie quick question. You mentioned that you used a 60x20 flat bar but what thickness is the bar? What is the minimum thickness?
    When you specify a 60 x 20 flat bar, that is the width and thickness. Length is not specified.
    Everything is a hammer.
    Unless it is a screw driver.

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  19. #19
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    Default READ between the lines?

    Are you telling me that the STANDARD recovery point on my Prado is no good?

    is probably about 15 -16mm looped "rod" , bolted to the chassis, has some welding to get the "rod" onto the plate though, is that the problem?

    need a pic?
    Hilux Dakar & Comfort trailer
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  20. #20

    Default

    Randy,

    Past sunday I was recovered with the mitsu's factory recovery point. It is 6mm thik. It did not break. Perhaps it will not last with all the abuse. I dont know....... The new 20mm one sure worked fine.
    Ride 1 (For Playing)
    1999 4L V8 SWB Payota or Toyjero

    Ride 2 (For Trips)
    1999 3.5L V6 SWB Pajero

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