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December 29th, 2008, 09:22 AM   #1
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Torque Wrenches???

Any advice? Manual says I need something for 10-100 NM. Other bikes are in inch pounds, and foot pounds. So was researching and can buy like 3 decent analog wrenches to cover the different torque values, but it appears a Snap On Techwrench can do everything??? Same price - one wrench.
Anyone got one? Supposed to just hit a button and it goes from NM to Inch pounds and back and forth. Any ideas?
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December 29th, 2008, 11:18 AM   #2
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RE: Torque Wrenches???

I have 3 tech-angles for 3 different drives, do all your torque weights AND degrees, cost me a small fortune, but the best tool money can buy. I work in precision engineering and have never had to calibrate one yet. shit hot mate, get one
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December 29th, 2008, 11:31 AM   #3
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I use a Sears Cheapie, 0-100 Nn and has ft/lbs. $30.00

http://www.sears.com/shc/s/p_10153_12605_00944978000P
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December 29th, 2008, 12:26 PM   #4
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Re: RE: Torque Wrenches???

Originally Posted by grasstrackpete
I work in precision engineering and have never had to calibrate one yet. stuff hot mate, get one
Calibrating of a torque wrench is essential after some period of time, doesn't matter how good is it, who is the manufacter!!! It's a same like checking valve clearances!!! The spring inside the torque wrench is loosing its characteristic in small range, and it's absolutely normal!!!It's happening, because torque wrench is exposed to atmosphere, is got the contact with oxygen, the temperature around the torque wrench is constantly changing.All these things got an influence for sensitivity of torque wrench.The fact, that you haven't calibrated it yet, doesn't mean that is extra super-dooper( how do you know that it indicates the torque properly?), It just means that you realy do and want to belive it is super!
If the calibrating is not necessary, please explain me one thing:
Take a cast of iron straight from foundry.First.try to machine it.Let's say, try to make a cylinder liner.Second.Machine the sample and carry out the strenght test according to ISO standards.Write all figures down.Third.Measure your cylinder liner at all directions, at all heights, at all axis with very very accurate measuring tools.With 0.01mm accuracy.Write all dimensions down.
Then, glow your liner to let's say, 200degree Celsius
Repeat all measurements in a same way as when was cold.
Compare the figures when cold-when hot- and cold again

Then, take the same iron cast and leave it uncovered somewhere outside.let it lay on the ground, exposed on wind, rain, etc.Leave it for 6years.Then, machine the cast.Observe the machining process.Notice the structure of swarf.
Again, make a same sample and strenght test it again with the same as before conditions.Write the results down.Make the cylinder liner again.Repeat measurements when cold and when hot (keep the same temperatures and use the same measuring tool)

compare the results- that one straight from foundry with that one after 6 year of laying down outside.
What do you think, which one will have better material features???
Obviously nobody in foundry don't wait 6 years, they make that synthetically, there is speciall procedure in oven to achieve the result after 9-10 hours instead of 6 years!

Tell me, what is happening witch material.
That same is happening with your torque wrench, especially witch spring.
We callibrate the torque wrenches once per year.
After annual period, decalibration reaches 1-2%
That is, I think proper way.
The torque wrench, as every other tool, is getting worn.
Our torque wrenches have around the grab section, scales in NMs, lb ft, itd.It's easy to use them.
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December 29th, 2008, 01:32 PM   #5
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RE: Re: RE: Torque Wrenches???

They dont have springs, therefore limited wear hence why i use them. By calibrate i meant adjust, i test calibrate weekly, sorry for my wording.Ii dont need a lesson on how to use or test a torque wrench, i have in the past given the lessons, working closely with lloyds regiser and dmv, and worked at a specialist testing company, in fact the only one in europe who can go to 2000 tons. Thanks for the lesson though. No one knows everything mate, and no-one likes a clever-dick.
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December 29th, 2008, 01:48 PM   #6
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RE: Re: RE: Torque Wrenches???

True story.

My wife once asked me what the point of a "spanner that speaks to you?" was.

After a few questions concerning the comment, it became apparent that she had thought this was called a "talk wrench".... classic & very cute!!
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December 29th, 2008, 01:49 PM   #7
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RE: Re: RE: Torque Wrenches???

I wouldnt want to use a torque wrench at 200 deg c either, id burn me fingers and the LCD display would melt.

For any mechanic diy or proffesional, all you would ever need, a fab bit of kit

For any engineer, a fab bit of kit also, for all you would ever use a conventional torque wrench for

Manufacturer is Snap-on Tools USA by the way, normally mechanics use their stuff but i think the quality is great
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December 29th, 2008, 02:07 PM   #8
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RE: Re: RE: Torque Wrenches???

just to irritate the expert if your stuck without one you can use a spring balance on the end of a spanner and a calculator

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Bushy Bushrat
B.Mech .eng
knowitallbawsterd@wonk.com
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December 29th, 2008, 02:17 PM   #9
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Re: RE: Torque Wrenches???

Originally Posted by Krisbrumm
compare the results- that one straight from foundry with that one after 6 year of laying down outside.
What do you think, which one will have better material features???
Obviously nobody in foundry don't wait 6 years, they make that synthetically, there is speciall procedure in oven to achieve the result after 9-10 hours instead of 6 years!
Apologies for butting in here.... if you’re referring to heat treatment used to change the mechanical properties & microstructures of a material in the foundry, versus leaving the same untreated material exposed to the elements for six years & getting the same or similar result? I’m afraid to say that this is in no way possible.

You could leave the item there for 500 years, and the mechanical properties/microstructure obtained with either alloy additions/heat treatments (such as age hardening), or more simple quenching, annealing etc), could never be achieved by merely leaving it in the rain.

I’m sorry, just as a metallurgist I couldn’t read that & keep my nose out…

Cheers

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December 29th, 2008, 02:25 PM   #10
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Re: RE: Re: RE: Torque Wrenches???

Originally Posted by bushmechanic
just to irritate the expert if your stuck without one you can use a spring balance on the end of a spanner and a calculator

regards

Bushy Bushrat
B.Mech .eng
knowitallbawsterd@wonk.com
Haha, brilliant!! Had to do that when i was at college
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