Re: [ST] countershaft sprocket

[<lsbradley@xxxxxxxxxxx>]

the indusrty I work in we put threaded  3 1/2 " bolts ( for lack of a better 
term )  into the end of airgas cylinders and torque them to over 600 foot 
pounds.  After years of servive they need to be removed for re testing.
We use a 1 '' drive impact wrench.
But in certain situations and more often than not we end up using a box 
wrench  with a 4ft long pipe on it.  one guy applies  down force to the 
wrench while the other guy continuely taps the "bolt head" ( for lack of a 
better term)  with a 3 lb  hammer  and usually we get them to break free.

If you don't have access to the air power  have someone help you by tapping 
on the breaker bar with a hammer while you hold it with some down force.


theothersean
02 Triumph sprint rs(  forsale $3800)
00 Honda  xr70
00 Suzuki drz400
06 Kawasaki ninja650 (hers)


----- Original Message ----- 
From: "Chris Harwood" <Chris@xxxxxxxxxxxxxxxxxx>
To: <ST@xxxxxxxxxxxxxx>
Sent: Monday, December 18, 2006 6:21 PM
Subject: Re: [ST] countershaft sprocket


> Another advantage of impact drivers is that they can use the inertia of 
> the gearbox etc. to provide the countering force to hold the shaft still 
> and thus break the stiction on the thread.  The down side is that it could 
> potentially damage said components e.g. break off pinion teeth etc.
>
> Chris Harwood
> 00 RS
>
>>>> halfast3@xxxxxxxxxxx 18/12/2006 23:00:35 >>>
>> Since I believe the law that for every action, there is an equal but
> opposite reaction is still in effect, how can an impact driver impart
> that much torque and stay in the mechanics hands? <
>
> The force required to break the nut loose can be considerably more
> depending on a number of factors: corrosion, rust, loctite, etc..  The
> "impact" can overcome them. Mike's excellent description not
> withstanding, there's nothing magic about an impact wrench.  You can
> achieve the same thing with a standard breaker bar and a large hammer.
> The impact tool is just makes the task easier.
> Good luck,
> --
> Rick
>
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