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Torque Multiplier Reaction Arm

Zewnten

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Apr 2, 2018
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Earth
Using a 16:1 torque multiplier, Proto 6232. Issue is there's nothing near the bolts to brace it against. Coworker says shove a pry bar or pipe in the factory supplied one. I'm thinking there's probably a longer one available but I'm not finding anything on Proto. What do you guys do?
 

donkey doctor

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Ladysmith bc canada
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retired
When we torqued slewing ring bolts in the outer ring we dropped a piece of round stock into one of the bolt holes in the inner ring to brace it against. When we did the inner ring we had the tub it was mounted on to brace it against. Pretty hard to hold 16:1 d.d.
 

Zewnten

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Apr 2, 2018
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Mutiplier is rated to 3200ft/lbs, doing hammer rebuilds the long bolts took almost all of that with the torque to yield specs but in this case it's 1600ft/lbs for an excavator mounted hydraulic shear inserts. The top insert's bolts are ~4ft off the ground and there's nothing inline to hold the multiplier for any of the 12 bolts.
 

Zewnten

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Apr 2, 2018
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Earth
@Nige no pictures, job is coming up and I've seen it done before and what a disaster that was.

@92U 3406 Blades. Not enough articulation in the machine to get the shear close to the ground. I was thinking of grabbing another machine to brace against but I need a longer reaction arm, the one supplied is only about a foot long.

Was thinking of finding good heavy wall tube, not pipe, get the inner diameter the same as the OEM one but doubling up on the wall thickness since I've got no idea if the OEM arm is something special.
 

JD955SC

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Mar 13, 2011
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They need to rent or borrow you a hydraulic wrench with appropriate stuff to react off of.

F*** a multiplier. I won’t use one outside of some very specific circumstances. That thing shears with you up there and it’s likely gonna hurt or kill you.

Also I hate engineers that don’t account for tooling needs and access when they design their junk that you can’t use tooling with. “Oh you need to do this ridiculous procedure bbuuutttt we aren’t going to give you any realistic way to do it.
 

Zewnten

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Apr 2, 2018
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@JD955SC I'd prefer a rad gun honestly. I don't like the hydraulic units except on really big stuff, never seem like they're solidly seated but I also wasn't wasn't doing the job so it very well could have been the operator more than anything.

@crane operator On the blade inserts. They're a cone shaped hex on the inside of the shear and nuts on the outside. Needs either something to reach the ground 4ft down or a bent foot to rest against the other nuts.
 

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JD955SC

Senior Member
Joined
Mar 13, 2011
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1,349
Location
The South
@JD955SC I'd prefer a rad gun honestly. I don't like the hydraulic units except on really big stuff, never seem like they're solidly seated but I also wasn't wasn't doing the job so it very well could have been the operator more than anything.

@crane operator On the blade inserts. They're a cone shaped hex on the inside of the shear and nuts on the outside. Needs either something to reach the ground 4ft down or a bent foot to rest against the other nuts.
Either way rad gun or hydraulic wrench they need to get what works best. The cost of rental or even purchase is nothing compared to a lost time injury, a fact you might point out if they balk.

over two decades into the twenty first century these 1960 cheapskate manager attitudes need to go. We have skills that are the mechanical equivalent of doctors and surgeons and it’s time we get treated better when it comes to working conditions and modern tooling
 
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92U 3406

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I've done a lot of blades on those Italmek shears but they always had threaded holes in the blade and regular bolts countersunk into the holes on the beak and main frame. From personal experience I've twisted off several hex sockets just trying to torque the beak bolts with a 3/4 drive torque wrench.

Is the rotation on the shear operational? Should be able to get that sucker almost on the ground.
 

Zewnten

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Apr 2, 2018
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@crane operator think we used the same pic haha

@92U 3406 This one is torque on the nut side, using an allen to hold it from spinning until the cone jams hard enough to hold itself. I'm sure the rotation works is, but coworker assured me it couldn't get close tot he ground, so I'll have to mess with it and see.
 

crane operator

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sw missouri
Ha- you must have been posting while I was looking for a picture.

The way some of those shears are mounted (so they hang vertical in use), I could see it being tough to get to the ground. Maybe set the shear down beside the top of a dozer blade or heavy loader bucket?

A hytorc isn't going to help much - you don't have anything for the arm to come up against, and I'm sure they don't want you welding bars onto the shear for the hytorc to rest against.
 

92U 3406

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@crane operator think we used the same pic haha

@92U 3406 This one is torque on the nut side, using an allen to hold it from spinning until the cone jams hard enough to hold itself. I'm sure the rotation works is, but coworker assured me it couldn't get close tot he ground, so I'll have to mess with it and see.
Interesting. The Italmeks I've worked on were rebranded for another company so maybe they had a few design changes made?
 

Zewnten

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Apr 2, 2018
Messages
553
Location
Earth
Ha- you must have been posting while I was looking for a picture.

The way some of those shears are mounted (so they hang vertical in use), I could see it being tough to get to the ground. Maybe set the shear down beside the top of a dozer blade or heavy loader bucket?

A hytorc isn't going to help much - you don't have anything for the arm to come up against, and I'm sure they don't want you welding bars onto the shear for the hytorc to rest against.
that's what I was thinking, grab an excavator bucket to push against
Interesting. The Italmeks I've worked on were rebranded for another company so maybe they had a few design changes made?
It's an old machine and I'm sure the shear isn't much newer. Not sure what brand it is, customer just needs us to do the labor they're supplying parts and torque spec and spacing between the blades.
 
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