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| stranger12 |
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 stranger12 World Chat Champion
Joined: 12 Mar 2012 Karma :   
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| barrkel |
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 barrkel World Chat Champion
Joined: 30 Jul 2012 Karma :   
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 Posted: 16:32 - 31 May 2014 Post subject: |
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I can't speak for working on cars, but on bikes, there are only a handful of nuts where an impact wrench is genuinely useful, and for those, 265Nm may not be enough.
I'm thinking of things like front sprocket nuts, which can be extremely tight, and damping rod bolts in forks, which sometimes need a repeated high-speed whizzes.
Also, impact wrenches aren't something that you'd typically use for hours at a time, unless you're breaking a bike and don't particularly care if you do a bit of damage to a bolt head, and you just want it undone quickly.
I have a 250Nm cordless that I normally only use on my scooter for things like the clutch bell nut, and to speed up removing the 10+ bolts on the CVT crankcase cover. For more serious stuff I use my corded 400Nm - I got nowhere on forks with 250Nm. ____________________ Bikes: S1000R, SH350; Exes: Vity 125, PS125, YBR125, ER6f, VFR800, Brutale 920, CB600F, SH300x4
Best road ever ridden: www.youtube.com/watch?v=s2MhNxUEYtQ |
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| Llama-Farmer |
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 Llama-Farmer World Chat Champion

Joined: 23 Jan 2012 Karma :   
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| stranger12 |
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 stranger12 World Chat Champion
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| Llama-Farmer |
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 Llama-Farmer World Chat Champion

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| stonesie |
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 stonesie World Chat Champion

Joined: 04 Jul 2010 Karma :     
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 Posted: 21:56 - 31 May 2014 Post subject: |
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If a bolt has seized then it will be a bugger nomatter what you use, my impact gun has 610 Lb:Ft of reverse torque and has been defeated by a wheel bolt on a car Breaker bar with a length of pipe on the end was needed for that.
On the other hand I had a derp moment and took the chain off my last bike before cracking the front sprocket nut, didn't want to rattle the gearbox so it was in neutral too... A couple of burps and that nut was off  |
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| barrkel |
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 barrkel World Chat Champion
Joined: 30 Jul 2012 Karma :   
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 Posted: 23:06 - 31 May 2014 Post subject: |
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| stranger12 wrote: | re torque, I have tighten my bmw 24mm nut to 250nm and that is bloody tight and hard using a 60cm bar or leverage bar.
I would have then thought 265 would undo anything , wouldn't it ? |
Definitely not IMO. Keep in mind that apart from corrosion, things like threadlocker may be applied that will increase the needed torque to undo. Having a high torque ceiling saves you having to mess with heat guns etc.
Front sprocket nut on my ER6f defeated both cordless impact wrenches at my local garage, and defeated the air gun until the compressor was started up again.
With fork damper rod retaining bolts, it's more an issue of speed than absolute torque. The damper rod is free to rotate, so if the bolt is stuck in the rod's threads, both bolt and rod will rotate as a unit. The bolt needs to be given high jerk torque to undo it - i.e. suddenly hitting it with torque.
Knowing what I know now, I wouldn't have bothered with the 250Nm cordless I have, I'd have gone straight for something bigger. ____________________ Bikes: S1000R, SH350; Exes: Vity 125, PS125, YBR125, ER6f, VFR800, Brutale 920, CB600F, SH300x4
Best road ever ridden: www.youtube.com/watch?v=s2MhNxUEYtQ |
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| G |
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 G The Voice of Reason
Joined: 02 Feb 2002 Karma :     
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 Posted: 23:22 - 31 May 2014 Post subject: |
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Not at all reundoing anything.
First off - eat some pies.
And - guessing you don't lift, bro'!
My lorry comes with a wheel brace that's maybe .75cm. My deadlift is far from amazing, but from that, I should be able to apply about a bit over 1100nm of torque on the bolts.
Initially pre-MOT, I couldn't budge them. Ended up borrowing a diesel air compressor and a 1" drive impact wrench (many torques.)
When I had a blow out, thankfully I'd made sure they weren't done up with the 1" driver - so could JUST get them undone by hand.
How about this if you don't need battery power? The batter ones have a habit of draining the batteries pretty quickly; with not much torque you need to hold it on for a while typically. |
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| barrkel |
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 barrkel World Chat Champion
Joined: 30 Jul 2012 Karma :   
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| stranger12 |
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 stranger12 World Chat Champion
Joined: 12 Mar 2012 Karma :   
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Old Thread Alert!
The last post was made 11 years, 275 days ago. Instead of replying here, would creating a new thread be more useful? |
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