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Author Topic: Straightening a Logrite  (Read 2004 times)

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Offline kelLOGg

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Straightening a Logrite
« on: August 30, 2021, 09:56:35 AM »
A customer forgot his 5' logrite when he delivered logs - it has a bend in it and I thought I would offer to straighten it for him. I have a 20T hyd cyl that extends about 20" more. I plan to use it and a heavy chain and give it a shot. I have straightened steel ramps this way but never an aluminum alloy. The bend is not in the plane of the hook so it looks like it got run over by a big truck. Since it is someone else's property I don't want to screw it up. Any advice? I will check with him if FFers think it is safe to try.



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Offline GAB

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Re: Straightening a Logrite
« Reply #1 on: August 30, 2021, 10:07:32 AM »
If I was considering that task I'd use a hydraulic press and some Vee blocks.
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Offline Tacotodd

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Re: Straightening a Logrite
« Reply #2 on: August 30, 2021, 10:16:07 AM »
Get hold of LogRite and see what they can tell you as far as strength retainment goes. I’d also take the hook off to keep it from spinning in the press if you aren’t right next to it. 
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Offline charles mann

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Re: Straightening a Logrite
« Reply #3 on: August 30, 2021, 11:30:41 AM »
As GAB said, V blocks or better yet, a pipe mandrel designed for bending pipe
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Offline mike_belben

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Re: Straightening a Logrite
« Reply #4 on: August 30, 2021, 11:55:34 AM »
vee blocks in the press.  roll it in the blocks and mark the high spots so you know exactly where to press.  
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Offline KirkD

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Re: Straightening a Logrite
« Reply #5 on: August 30, 2021, 11:58:16 AM »
We use to use a wide hardwood v-block on bent motorcycle forks. They have less of a chance of creasing than metal.
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Offline Tam-i-am

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Re: Straightening a Logrite
« Reply #6 on: August 30, 2021, 12:04:12 PM »
It is not that big a bend so Vee blocks and a press should get it to relax nicely.

Offline Southside

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Re: Straightening a Logrite
« Reply #7 on: August 30, 2021, 02:06:41 PM »
How you gonna feel when he tells you that bend was custom done to allow for finger room when loading his trailer and his late father-in-law toiled for days to get it just right?  ;D
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Offline Old Greenhorn

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Re: Straightening a Logrite
« Reply #8 on: August 30, 2021, 03:13:24 PM »
I have done these type things before, it can be more tricky than one might first guess. Because it is not yours and you are trying to do something nice and not make it worse, you have to be careful. V-blocks will work but they will leave gouges in the shaft where there is a line of contact and you reach the force necessary to effect a reverse bend. What you really need is surface contact around the radius to spread the load out. So if I were doing this, here is now I would go:

make 3 blocks from hardwood with grooves in them to match the outside radius of the shaft, two of these should be longish, 8-10" to again spread the load out, the 3rd should be around 4-6" long, this is your pusher block. On the 3rd one try to have the groove perpendicular to the grain to minimize splitting potential.
 Find the high spot and center of the bend and mark it. Place the high spot straight up and right under the arbor. Space the two evenly away from the center, start with them as far apart as possible. Begin your pressing and watch carefully to see where the shaft is reacting. Adjust your blocks as needed to prevent adding new 'alternate' bends. Heating the bottom side would help, but the paint will be gone. Take you time. When you get close, you will likely have to overbend it so be careful. You can measure the distance from the bottom of the shaft to the deck to know how far you went, then release, check it, and if it needs more, go a little deeper on the next push. If you don't measure you won't know where you were.

 Take your time, take your time, take your time.
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Offline Tom King

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Re: Straightening a Logrite
« Reply #9 on: August 30, 2021, 03:24:49 PM »
I would rather pull it back out, than push it.  Secure, and padded on the hook end, and a long padded pipe over the handle.

I'd like to know what type of aluminum it is first though.  Some would crack, and be better to leave it alone.

Offline kelLOGg

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Re: Straightening a Logrite
« Reply #10 on: August 30, 2021, 04:14:09 PM »
Now I know it is certainly a job for someone else - like a machine shop. Here's what I did (after talking to the owner who said "by all means") and then gave up on.



 

I could over-bend it easily but it wouldn't stay bent. I wasn't going to apply more force for fear of introducing another bend near the ends and of the lack of stability of my setup. Glad I stopped before doing a favor turned into a mistake.
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Offline Silverfoxfintry

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Re: Straightening a Logrite
« Reply #11 on: August 30, 2021, 04:36:10 PM »
Most aluminium alloys “age harden” this means that you can soften the alloy by heating above the critical point. The alloy will soften. Straightening the now soft alloy is now much easier.
The original strength will return to the metal in a couple of days.
Aluminium alloy rivets are annealed before use. If not kept in a freezer they harden again in about 24 to 36 hours.
Interesting, when cigar tubes are formed, the process happens to fast for the alloy to work harden.
(Or so I remember from college lectures 50 odd years ago)
Hope this helps.

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Offline Old Greenhorn

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Re: Straightening a Logrite
« Reply #12 on: August 30, 2021, 04:41:56 PM »
Silverfoxfintry, this is a steel hook if I recall correctly.

Actually that setup you have is a pretty good idea and as long as the shaft does not snap around on you it should work. BUT I have no idea what Kevin has used when he designed that hook. Since it is their 'Xtreme" hook I am going to guess he picked a higher end high tensile steel. From what I have seen of Kevin's design skills and habits I have come to respect his abilities as someone who has a good handle (pardon the pun) on it and knows exactly what he is doing and more importantly why. (In short, the guy has "game".)
 SO I am thinking if there is a chance to fix that, heat will be needed. There is no way knowing what the after effects will be once heat is applied because you are basically annealing the material and letting the grain structure re-organize a little bit. You would need to know the exact alloy being used and what production processes it has already been through. Anything else is guessing, at best. But even a blind squirrel finds a nut once in a while. :D  It could work, maybe.
 You gave it a good shot and were probably very smart to stop when you did. Maybe give LogRite a call and see what Kevin thinks. One thing is for sure, those hooks are tough!
 @Tam-i-am any thoughts?
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Offline GAB

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Re: Straightening a Logrite
« Reply #13 on: August 30, 2021, 07:24:44 PM »
Now I know it is certainly a job for someone else - like a machine shop. Here's what I did (after talking to the owner who said "by all means") and then gave up on.


(Image hidden from quote, click to view.)
 

I could over-bend it easily but it wouldn't stay bent. I wasn't going to apply more force for fear of introducing another bend near the ends and of the lack of stability of my setup. Glad I stopped before doing a favor turned into a mistake.
Looking at the setup in reply #10 I find the most appropriate item in the picture to be the street sign.
GAB
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Offline kelLOGg

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Re: Straightening a Logrite
« Reply #14 on: August 30, 2021, 08:49:26 PM »
I thought the same thing when I saw "STOP".
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Offline kelLOGg

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Re: Straightening a Logrite
« Reply #15 on: August 30, 2021, 08:50:53 PM »
I wasn't about to heat it for fear of changing the hardness.
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Offline Jeff

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Re: Straightening a Logrite
« Reply #16 on: August 30, 2021, 09:14:11 PM »
Can we gets some close ups of the inside of some of the parts bins?
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Offline Southside

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Re: Straightening a Logrite
« Reply #17 on: August 30, 2021, 09:17:06 PM »
Asking for a friend there Jeff?  :D
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Offline Jeff

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Re: Straightening a Logrite
« Reply #18 on: August 30, 2021, 09:17:53 PM »
Um yea.
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Offline mike_belben

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Re: Straightening a Logrite
« Reply #19 on: August 30, 2021, 09:49:46 PM »
 ;D
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Offline kelLOGg

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Re: Straightening a Logrite
« Reply #20 on: August 31, 2021, 07:41:25 AM »
OK  - you asked for it but be prepared. I more organized than I am clean and neat.



 

 

 

 

 

 

 

 
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Offline Magicman

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Re: Straightening a Logrite
« Reply #21 on: August 31, 2021, 07:54:42 AM »
Looks like you are a bit screwy but mostly nuts.  thumbs-up   :D
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Offline kelLOGg

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Re: Straightening a Logrite
« Reply #22 on: August 31, 2021, 08:57:34 AM »
 lol
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Offline Jeff

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Re: Straightening a Logrite
« Reply #23 on: August 31, 2021, 09:43:40 AM »
@metalspinner would like to see the brass section. ;D
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Offline kelLOGg

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Re: Straightening a Logrite
« Reply #24 on: August 31, 2021, 12:40:42 PM »
OK @metalspinner ... get ready.
.
.
.
tadaaa




 

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Offline ljohnsaw

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Re: Straightening a Logrite
« Reply #25 on: August 31, 2021, 02:03:30 PM »
Here's some of mine...


 #6 machine screws up to 1/4" in zinc and stainless.  A little metric on the upper right.

 5/16" up to 3/4" in zinc and stainless (mostly stainless).  Then I have a set of metal drawers for the big stuff.  I don't have to visit the hardware store very often...

Speaking of brass - I took a bunch of metal from a garage sale freebie pile.  What I thought was a 3/4" plate aluminum with some brass blocks turned out to be stainless.  The brass blocks (2 piece setup) was some sort of water cooling for a laser.  The pairs were about the size of a small brick.  Three of those weighed about 30 pounds.  With that, I had 51 pounds of scrap brass (door handles and faucets) and the scrapyard gave me $100 for it!
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Offline Jeff

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Re: Straightening a Logrite
« Reply #26 on: August 31, 2021, 04:42:00 PM »
Now were talkin!  Roller bearings please. ;D
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Offline Old Greenhorn

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Re: Straightening a Logrite
« Reply #27 on: August 31, 2021, 05:59:01 PM »
Jeff, are you taking inventory?
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Offline barbender

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Re: Straightening a Logrite
« Reply #28 on: August 31, 2021, 07:20:54 PM »
That jar container looks like something off of Wheel of Fortune😂
Too many irons in the fire

Offline Don P

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Re: Straightening a Logrite
« Reply #29 on: August 31, 2021, 08:05:57 PM »
I'm pretty sure they had my little sister cause Dad needed more baby food jars for hardware ;D.

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Offline kelLOGg

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Re: Straightening a Logrite
« Reply #30 on: August 31, 2021, 08:41:28 PM »
That jar container looks like something off of Wheel of Fortune😂
Vanna White built that for me. ;D
(How much longer can this go on? (It is fun)
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Offline Andries

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Re: Straightening a Logrite
« Reply #31 on: August 31, 2021, 09:15:01 PM »
Who cares about roller bearings?
Everybody's got those!
I wanna see the Higgs Boson! 
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Offline kelLOGg

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Re: Straightening a Logrite
« Reply #32 on: September 01, 2021, 07:39:28 AM »
OK, first the roller bearings:



 


Now, Andries wanted to see the bosons. I took the lid off and, much to my surprise, all I saw was screws with threads I couldn't identify - I couldn't match them to English or metric. Very odd, I thought. How did they get there?  Then. I thought, maybe we're looking at the decay products of the Higgs boson. Wow! maybe a career in high energy physics awaits me - naw - I'm sticking with sawmilling, but I will contact CERN about this observation.  ;D







 

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Offline metalspinner

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Re: Straightening a Logrite
« Reply #33 on: September 01, 2021, 08:04:36 AM »
 Parts bins and drawers o’ crap have always intrigued me. I love opening a drawer to discover what might be inside. 
But then this usually leads to hours of organizing and reorganizing. Of course, I then have to remember the new spot I put the stuff!
I do what the little voices in my wife's head tell me to do.

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Re: Straightening a Logrite
« Reply #34 on: September 01, 2021, 08:18:20 AM »
I also have an affinity to household junk drawers. Treasure troves!
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Re: Straightening a Logrite
« Reply #35 on: September 01, 2021, 08:22:39 AM »
Well it doesn't matter how nicely you ask, I am not showing you what's in my drawers. :D :D
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Offline samandothers

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Re: Straightening a Logrite
« Reply #36 on: September 01, 2021, 08:57:25 AM »
Looks like you are a bit screwy but mostly nuts.  thumbs-up   :D
At least his screws aren't loose like mine!
My dad had a rolling holder similar to yours using glass baby food jars. It hung up in between the floor joists in the basement to hold small items. 

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Re: Straightening a Logrite
« Reply #37 on: September 01, 2021, 10:28:50 AM »
Just call me the midget doctor.
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Offline handhewn

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Re: Straightening a Logrite
« Reply #38 on: September 01, 2021, 11:39:47 AM »
An old, very handy old man once showed me something that has worked very well for me whenever I need to bend anything, particularly anything hollow/tubular. If you can slip a spring over it at the bend spot, it is far less likely to kink. The tighter the spring the better. That Logrite is a little on the large dia. size but something like a garage door or motorcycle suspension spring would work. This does work surprisingly well in many applications.

Offline Sixacresand

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Re: Straightening a Logrite
« Reply #39 on: September 02, 2021, 01:39:12 PM »
I rolled a big log off a flat bed truck and it fell across my logrite.  It still works but is bent.  I always worry about a dog or cat or unattentive human lurking about during log unloading.  
"Sometimes you can make more hay with less equipment if you just use your head."  Tom, Forestry Forum

Offline KirkD

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Re: Straightening a Logrite
« Reply #40 on: September 02, 2021, 01:59:44 PM »
An old, very handy old man once showed me something that has worked very well for me whenever I need to bend anything, particularly anything hollow/tubular. If you can slip a spring over it at the bend spot, it is far less likely to kink. The tighter the spring the better. That Logrite is a little on the large dia. size but something like a garage door or motorcycle suspension spring would work. This does work surprisingly well in many applications.
Packing the inside with sand will work to.
Wood-mizer LT40HD-G24 Year 1989

Offline metalspinner

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Re: Straightening a Logrite
« Reply #41 on: September 02, 2021, 09:29:22 PM »
Traditionally, brass instrument tubing and bells (like trumpets and tubas) are filled with pitch and allowed to cool. Then they are bent around a form. The pitch is then melted back out. This allows for a perfect bend with no deformation in the material.

The new-school way is to fill the tubing with a soapy water solution then freeze it. After the bend, the parts are just hung over a tub to collect the defrosting water.
I do what the little voices in my wife's head tell me to do.


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