[modeleng] Re: Simple Question

OK if you're working in your shop, a few shifters come into their own 
when you are doing field work or working out of your truck, as I do, 
where weight and space are at a premium and you just can't carry 
spanners to cater for every eventuality.
Interestingly enough, the shifting spanner was actually invented to fit 
non-standard bolt heads - such as when a bolt head had been re-machined 
to remove damage or burring. Bit pointless in this day and age, as the 
bolt would simply be replaced (how many hex heads has anyone here re-cut?)

Jesse Livingston wrote:
> Too right yer are Andy.
>
>  I worked at the machinist trade for 20 some odd years and never even owned 
> an adjustable spanner.  Had a full assortment of sockets, open ends and box 
> ends to fit every occasion until some idiot decided to start using them 
> Meteroric bolts in our vehicles.
>
> Jesse in still hot and dry Troy, TN
>
>
> ----- Original Message ----- 
> From: "Andrew Houston" <andrew@xxxxxxxxxxxxxxxxx>
> To: <modeleng@xxxxxxxxxxxxx>
> Sent: Friday, June 19, 2009 6:11 PM
> Subject: [modeleng] Re: Simple Question
>
>
>   
>> Barrie
>>
>> More than likely it's caused by the "backlash" in the adjuster.  When you
>> put the spanner on the nut and adjust it to fit, the adjuster is pushing 
>> on
>> the side that forces the jaws closed.  Therefore, the clearance on the
>> adjuster is on the side where the jaws can only become smaller.
>>
>> When you remove said spanner from the nut, the jaws will relax towards the
>> smaller size - 'cos they can't go t'other way.
>>
>> Anyway, adjustable spanners should NOT be used on engineering bolts, 
>> screws
>> and nuts.  The correct sized, ring spanner, open ended or socket is an
>> engineering tool.  Adjustable spanners are ok for plumbing (actually pipe
>> fittings since plumbers deal in lead pipes and sheets that don't need
>> spanners) and gas fittings.
>>
>> Simple !
>>
>> Andy
>>
>> -----Original Message-----
>> From: modeleng-bounce@xxxxxxxxxxxxx [mailto:modeleng-bounce@xxxxxxxxxxxxx]
>> On Behalf Of Barrie Purslow
>> Sent: 19 June 2009 21:07
>> To: Model Engineering List
>> Subject: [modeleng] Simple Question
>>
>> Whenever I use an adjustable spanner I always make sure the jaws are
>> adjusted to be a snug fit on a hexagon. But why is it that when I remove 
>> the
>> spanner from the hex. I cannot get it on again without increasing the jaw
>> spacing?
>> Barrie
>> MODEL ENGINEERING DISCUSSION LIST.
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>
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