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Author Topic: Straightening a bar.  (Read 10222 times)

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Offline Al_Smith

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Re: Straightening a bar.
« Reply #20 on: October 02, 2014, 09:51:05 PM »
 :D I get rocked chains and bent bars from a tree trimmer bud that  I repair .One was a 14" bar from a Stihl  020T they backed a chipper over .Looked kind of like a horse shoe with a twist in it .

I got it straight and untwisted but it took me several hours with the help of a big vise,4 pound thumper, arbor press and a 36" pipe wrench .Never say never .  ;)

Offline Maine logger88

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Re: Straightening a bar.
« Reply #21 on: October 02, 2014, 10:10:03 PM »
I have straightened bars that were bent slightly by sticking them between my tailgate and body of my pickup and prying them and keep checking with a straight edge
79 TJ 225 81 JD 540B Husky and Jonsered saws

Offline HolmenTree

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Re: Straightening a bar.
« Reply #22 on: October 02, 2014, 10:31:42 PM »
I have straightened bars that were bent slightly by sticking them between my tailgate and body of my pickup and prying them and keep checking with a straight edge
I have done that too with a few mild bends but when you get a twist or a kink making a bend only hammering can successfully get the bar's "flat memory" back and keep it straight.

You can pull a bar straight again but most times after some use it can sometimes start to go back to that bend again because it's  structure memory hasn't been restored.

I hope I explained that easy enough to understand :laugh:
Making a living with a saw since age 16.

Offline Maine logger88

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Re: Straightening a bar.
« Reply #23 on: October 02, 2014, 10:52:01 PM »
Yeh I understand what you are saying its just a temporary fix whatever it takes to get going again. Now I keep 3 or 4 spare bars behind the seat in the pickup. But back when I first started out I didn't have the money haha
79 TJ 225 81 JD 540B Husky and Jonsered saws

Offline HolmenTree

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Re: Straightening a bar.
« Reply #24 on: October 02, 2014, 11:11:04 PM »
Yeh I understand what you are saying its just a temporary fix whatever it takes to get going again. Now I keep 3 or 4 spare bars behind the seat in the pickup. But back when I first started out I didn't have the money haha
yeh when I was a young 26 year old logger I didn't have alot of money either, always had guaranteed good paying work but spent it as fast as I made it. Timber sports was where I blew alot of money.
Bars chains etc were more expensive too back in 1984 , a 18" bar went for around $60 not including tax back then......in our area anyways. Can get them cheaper now.
Making a living with a saw since age 16.

Offline luvmexfood

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Re: Straightening a bar.
« Reply #25 on: October 03, 2014, 07:05:45 AM »
Had my neighbor/tenant pick me up a Stihl chain the other day while she was out. She used to work at a John Deere dealership that sold Stihl and still gets a discount. Just under $10 bucks for a 16 inch chain for my 170. Long story but I lost it. Went by myself and got a replacement. $18 bucks. Must be a big mark-up on them.
Give me a new saw chain and I can find you a rock in a heartbeat.

Offline JohnG28

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Re: Straightening a bar.
« Reply #26 on: October 03, 2014, 09:16:45 AM »
I wonder if some heat would get a bent bar to go back to original shape? As I understand it, when large steel girders get bent they can usually be heated in up/down lines with a torch and will bring them back to their original shape. Not sure if it would work with smaller shapes like a saw bar though.
Stihl MS361, 460 & 200T, Jonsered 490, Jonsereds 90, Husky 350 & 142, Homelite XL and Super XL

Offline HolmenTree

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Re: Straightening a bar.
« Reply #27 on: October 03, 2014, 10:28:46 AM »
I've had success with heat on laminated consumer bars which are darn near impossible to properly straighten. If the center laminent plate is cracked forget it. Being flimsy from side to side tells you if it's broken.

Solid body replaceable nose bars heat applied is not a good idea. These bars  have complex tempering properties.  Soft in the middle and hard in the rails, any change of tempering can actually deform these bars more .
Making a living with a saw since age 16.

Offline JohnG28

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Re: Straightening a bar.
« Reply #28 on: October 03, 2014, 11:09:59 AM »
I suppose that would make some sense. The type of beam I'm thinking of is the type you'd see holding up a bridge deck or something, so not quite the same. Lot more material there.
Stihl MS361, 460 & 200T, Jonsered 490, Jonsereds 90, Husky 350 & 142, Homelite XL and Super XL

Offline HolmenTree

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Re: Straightening a bar.
« Reply #29 on: October 03, 2014, 03:04:09 PM »
I suppose that would make some sense. The type of beam I'm thinking of is the type you'd see holding up a bridge deck or something, so not quite the same. Lot more material there.
With steel prices that they are today  that big beam would be worth in the thousands of $
Best they straighten it up the best they can :D
Making a living with a saw since age 16.

Offline JohnG28

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Re: Straightening a bar.
« Reply #30 on: October 03, 2014, 06:28:18 PM »
That you're not kidding!  Those beams can be 70, 80, 120 lbs or much more per linear foot! But it depends on how bad they're damaged. There's a bridge north of me on the way to my camp that was hit about a year and a half ago by a guy with a feller butcher or something of the sort that was too high passing under. Stopped the truck from 55 mph in about 10 feet! And destroyed the first 2 or 3 girders from the north side. That bridge is still 1 lane today as the funds to replace are likely being used elsewhere in the great state of NY!  :D
Stihl MS361, 460 & 200T, Jonsered 490, Jonsereds 90, Husky 350 & 142, Homelite XL and Super XL


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