Wire Wheel Spanner

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Nick V12 e type
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#21 Re: Wire Wheel Spanner

Post by Nick V12 e type » Sun Mar 24, 2019 12:13 pm

I bought one of Lionel’s tools and found it to be excellent.

Good price
Good quality
Good service

Happy customer

Kind regards
Nick
e type series 3 V12 2+2 1972, Tesla Model S 2016

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JerryL770
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#22 Re: Wire Wheel Spanner

Post by JerryL770 » Tue Mar 26, 2019 12:39 pm

Series1 Stu wrote:
Fri Mar 22, 2019 1:22 pm
That's incorrect Jerry.

Loosening torque is always less than tightening torque due to overcoming friction as the nut etc starts to clamp the joint and then putting stretch into the threaded fastener. Engineering fact.

The reason for undoing often being more difficult than tightening is usually down to corrosion etc.
Wrong? I don't think so. Engineering fact? Maybe. Maybe not. Makes no sense to me.

It is a fact, proven in countless school laboratories that static friction is greater than moving friction, for an object. Proven by using a weight to move an object resting on a flat plain (plane?). The weight being insufficient to get the object to move without it being given an external nudge, at which point the weight is sufficient to keep it moving.

Now, of course, if a thread has corroded in the meantime it is bound together, but many is the time I have had to use a large tommy bar to get alloy wheel bolts, done up to the correct torque, to break out - especially when incorrectly, they have been lubed!

I got Lionel's tool also - excellent.
Jerome Lunt
1970 S2 FHC - Dark Blue, Red Interior, MX5 Seats

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mgcjag
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#23 Re: Wire Wheel Spanner

Post by mgcjag » Tue Mar 26, 2019 2:10 pm

Copy from Nord-Lock grp who should know about fixings .....Steve
WHEN TIGHTENING AND UNTIGHTENING?
Saturday, September 17, 2016
Q: Why is the untightening torque lower than the tightening torque when tightening a bolt or nut?

A: When tightening a bolt or nut, the applied torque must overcome the thread friction, the friction under the bolt head or nut and the inclined plane of the thread, to obtain a bolt preload (see Fig. 1A).

While untightening, provided that the assembly remains in the same condition, the applied torque only has to overcome frictional forces. As a result, untightening a fastener requires a lower torque (see Fig. 1B).

There are some exceptions to this rule. Since friction conditions vary, higher torque can be required to untighten a fastener. Corrosion, seizing, or surface roughness can considerably increase friction and subsequently the untightening torque.
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Steve
1969 S2 2+2 & Building a C type replica

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Series1 Stu
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#24 Re: Wire Wheel Spanner

Post by Series1 Stu » Wed Mar 27, 2019 10:02 pm

Thanks Steve. You saved me the trouble.

Schoolboy science is great for getting people interested in the subject but there's a whole lot more to engineering than sliding blocks down pieces of plywood.

Many years ago, as an apprentice, I spent 6 months developing a torque calibration procedure for pneumatic and electric screwdrivers in an electronics factory. It's amazing what you learn when you actually have a defined task. The knowledge stays with you too. As does the respect and admiration for the people who shared their skills and knowledge. Now it's my turn to help the current crop of young enthusiastic engineers to develop their skills and I feel privileged to do do.

Regards
Stuart

If you can't make it work, make it complicated!

'62 FHC - Work In (slow) Progress
'69 Daimler 420 Sovereign
'94 X300 XJR basket case

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AshM
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#25 Re: Wire Wheel Spanner

Post by AshM » Fri Mar 29, 2019 1:11 pm

Thanks for starting this thread Simon - mine arrived from Lionel today and I am delighted with it.

Does anyone know what torque setting I should use to tighten my wheels using the spinner please?

regards
Ash
Series 2 FHC 1970
1R 20607

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mgcjag
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#26 Re: Wire Wheel Spanner

Post by mgcjag » Fri Mar 29, 2019 1:43 pm

Steve
1969 S2 2+2 & Building a C type replica

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AshM
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#27 Re: Wire Wheel Spanner

Post by AshM » Fri Mar 29, 2019 4:04 pm

Thanks Steve.

Goodness that was quite a read! A lot more than a torque setting value.

Cheers
Ash
Series 2 FHC 1970
1R 20607

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