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Topic: TTY and angles??? (Read 921 times) previous topic - next topic

TTY and angles???

Well have a good discussion if some want to partite. With the new trend of TTY bolts how does one apply this theory in real life?? One must have a way to check the degrees a bolt is twisted according to manufacturers specks. This can be dun in many ways. A cheap plastic gizmo that sucks. Marking the bolts with white paint or buying a torque wrench with angle settings!! So my question is what kind of gizmo do you guys have?? I am in the market for a new wrench as we speak. They all are good some better than others. But quite pricy!! So my Snap On guy is fighting for my business as well as USA TOOL Mack And Matco. With this what do you guys say about the different ways and tools available to read this fascinating CONCEPT OF TIGHTENING FASTENERS. Another words how tight is those head bolts or whatever. And how to read it properly?? Thank You :hick::mullet:
I spend money I don't have, To build  cars I don't need, To impress people I don't know

HAVE YOU DRIVEN A FORD LATELY!!

TTY and angles???

Reply #1 –
I use an atech2fr100 I got from Snap-on.  3/8 with torque angle, peak display, and warning beeper/buzzer.  Awesome wrench.  If you use it a lot, it's well worth the large pile of cash.

TTY and angles???

Reply #2 –
BUT!!!!! How will it hold up after pulling down those head bolts. It is only 3/8 drive!!! That wrench is way under rated for head bolt use i would think!!! That is my dilemma.  Do i buy 3/8 or 1/2 inch??? The 3/8 is very reasonably priced compared to a 1/2 inch. Also the LS motors i do require big time TTY on the damper!!! So here is the question!!! Can a 2/3 drive be used on head bolts and not over work it. And i am set on buying both wrenches and that is a COOL GRAND!!! But times they are a changing!!!
I spend money I don't have, To build  cars I don't need, To impress people I don't know

HAVE YOU DRIVEN A FORD LATELY!!

TTY and angles???

Reply #3 –
I've been using it for 5 years. Base engine isn't my specialty anymore, but I lend it to the diesel guy a lot.  He does lots of cab-off head gaskets on 6.0L's and they take somewhere like 270 degrees Torque angle.  I did twist off the drive once (thought I broke my shoulder). Snappy fixed it on the truck, we have a good rep that comes when called, not just weekly.  If you're concerned, spend up for the 1/2 drive.  In any case, I've never heard of a better wrench.  The only complaint I have is that it's quite the ongoing expense to keep it fed with batteries.  Parts gives us all the batteries we need, but not everybody has an arrangement like that.

TTY and angles???

Reply #4 –
what about periodic calibration like any torque wrench,, and i would suspect not only the mechanical points but the digital display would require calibration as well.

Either your supplied with a reference system that allows you to notate the +/- tolerance or if you dont have the test bench / gear to verify it, then its gotta be mailed off to the manf lab,, Correct?

all for the sake of lighter engines.
perhaps aluminum bolts would be better, this whay the whole mess expands and contracts equally.  there are high grade AL bolts out there and the next near metal would be galvanized i guess.

sorry, a little off topic.

TTY and angles???

Reply #5 –
You answered my question!!! FOE snapping off the drive 3/8 is exactly my point!! So it will be the 1/2 inch job. Thanks.

Jay angle from what i am told does not need cal. As for the electronics in the wrench Snap On says it is self calibrated. This is beyond my electronic knowledge. As for the reason for TTY it is not from the small engines as FOE actually points out. The 6L Diesel is not a small engine. TTY is used for clamping forces to be as equal as possible and to get the fasteners in to their YIELD POINT. This in turn will clamp the parts together more evenly. The old torque wrench is GONE INACCURATE AND OBSOLETE. Thanks Guys been a good discussion.
I spend money I don't have, To build  cars I don't need, To impress people I don't know

HAVE YOU DRIVEN A FORD LATELY!!

TTY and angles???

Reply #7 –
you know its basically impossible what you are saying that it self calibrates.
if the wrench is not calibrated under normal operating conditions then its not calibrated. 

metals wear and stretch but perhaps this one is exempt from all that and it is a perfect wrench in which it will never wear out and never need lab calibration.  if so then it appears we have finally perfected the torque wrench.  ,,id say not and im skeptical.  I would be the guy asking all the hard questions of the rep exactly where in the product spec sheets assure its total life of use will never ever need any qualified and experienced technical calibration.

TTY and angles???

Reply #8 –
Well, as I understand it, it isn't a "torque" wrench at all, but an torque to yield wrench (TTY), which basically measures the angle of change, which could be accomplished with micro hash marks and a laser/pickup arrangement, much like a modern (laser enabled) computer mouse operates, in which case it might very well be capable of "self calibrating" to a very large degree.
 

TTY and angles???

Reply #9 –
i could be reading too much into it, the whole TTY process is somewhat hard for me to get my head around anyway.  First exposure to it was my 3.8L and the head bolts along with the process by which you properly torque the bolts. 
It reminds me of one other thing where on the A6 intruder aircraft in that if it did not leak hydraulic fluid while on the ground, then its broke.  system was designed such that at xyz feet above sea level the seals would all make up perfect during flight but not on the ground.
Special process with those aircraft to properly tighten things up as well....and thats an old bird.