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Likes: 975
Views: 15436
John this will give you a chuckle ,
I HAVE A KING DICK ! yes the torque wrench is a pommy brand from the 70`s , I have calibrated it 20 or so times over my 50 years of owning it , anyhow its still in the original wooden box and the handle has 2 red grip bands , instructions Sate , hand MUST BE BETWEEN the red bands on handle for accurate torque measurement ,
Great vid Mate , Keep them coming
Rob
Nowra
NSW
With respect John is this a winter fools joke meant to test us early on a Saturday morning? Methinks you are incorrect with respect to hand position. By grabbing the wrench at different places simply changes the 'effort' required 'on' the bar along its length to get to the same torque at the 'click' as the 'clicker' is within a rigid tube. The bar that holds the 'clicker' within could be longer in design to reduce the effort for us aging professionals. Just to ensure my old brain cells are still in the same place as my ancient lecturers told me they should be I did a test on wheel nuts and it makes no difference to the torque of the wheel nuts grabbing the bar in different places along its length.
It is more important to release the tension on the spring between uses (maybe weeks or months) and to tighten the knurled lock nut whilst using as it is 'soooo' easy to change the torque whilst using, been there done that. Try it out and video it to prove me wrong and I will humbly apologise but I just did this on a properly torqued wheel and the applied torque on the wheel nut remains the same no matter where the wrench is 'grabbed' along its length.
Love your videos John, and this one has gotten multiple views because I can't get my head around why exactly changing hand positions affects the torque measurement of the wrench because as I understand it, the wrench takes a torque measure and whether you put 100N at 50 MM, or 50N at 100MM, shouldn't affect what it tells you.
I can understand the torque offset caused by the actual measuring device of the torque wrench, the ramp, being in a different spot from the head which is where what we really care to be measured, but isn't torque equivalent throughout a system, or at least from an engineering diagram perspective it can be resolved anywhere?
Apologies for rambling on, but I'm curious if you have any more info for resources for understanding this.
Calibration video would be good, cheers.
Useful video JC. Years ago my uni applied mechanics/strength of materials lecturer (a bit of a car nut like most of us part time students at the time) said – " do not damage your nuts, spend your $ on a Warren and Brown deflecting dual signal beam torque wrench. Your nuts will always be in good condition"
I was an aircraft technician in the RAAF ( F111) we used a crows foot from time to time and we were taught to attach it at 90 degrees as you mentioned.
Thing is, I explained this to another youtube channel ( Nerb1) and he said no need to and he is an engineer .🤔
Thanks for the video JC, when I was a spanner spinner in the Navy working on helicopters, we had a large ‘Clock’ style torque indicator. We never trusted the markings on the wrench to set the torque.
It was great because if you had to use a extension you could accurately set the tool.
Of course there were all of the formulas available as well if you wanted to do it the longer way.
Now that I have retired and started tinkering with the car & motorbike at home, the only tools that I have that get the ‘Kidd Glove’ treatment are my torque wrenches, digital & traditional vernier & glass inspection mirrors!
Regards,
Shane.
I've switched to those newer Snap-On electronic torque wrenches. Not because it's better or anything, more to do with speed and angle for torque to yield bolts. But more importantly, it's the yearly on-site calibrations from the tool truck.
Hi John, as usual a very informative video. I'm wondering if you have any thoughts on the efficiency/effectiveness on how torque is applied to bolts where the head design is different. For example will the torque applied to the thread be different where the head is a 6 point hex vs a torx or a spline or an internal hex.
Some useful information fac.