Looking for some help finding a new a new torque wrench. I've done some research on google, but i still have a few questions.
Do split beam or digital torque wrenches tend to stay in calibration longer?
Is likely I will need to torque any bolts counterclockwise doing routine maintenance like timing belts?
Right now I'm leaning towards one of these two torque wrenches. Can you calibrate either of these at the user level?
CDI Torque 2503CF3 Drive Computorq 3 Electronic Torque Wrench, 1/2-Inch
Precision Instruments (PREC3FR250F)
http://www.amazon.co...=cdi split beam
1) I have no idea. However, during normal use and with proper care, I feel that re-calibrating a torque wrench for hobby-auto use is overkill. Don't even worry about it. I have a Snap-On torque wrench that is 30 years old, used often and professionally, and it still works fine to this day. Torque putty and instrument calibration are more common in higher pay grade situations (IE Aircraft repair)
2) Hardly ever do I find myself with the need to torque left-handed fasteners. It does happen but not often. Again, don't over think it - you will probably NEVER need this.
3) Personally I have NO desire to own Torque wrenches with either a battery or an LCD screen. I need mine to work EVERY time I pick them up. I am a little old fashioned and impatient with things that are over-complicated or designed to fail right out of the gate (IMHO). Again, just buy (2) good ones to start out with. First, a 1/2 drive for the larger stuff, and next a 3/8 drive unit for the smaller fasteners. When you get good with these and you turn super anal, treat yourself to a 1/4 drive unit for the detail work if you so desire (my advice here is to choose a unit that will read constant turning torque - for setting bearing pre-load).
4) Always clean them EACH and EVERY time when you are done using them. Return them to the original storage case. Keep them inside your home or garage, not bouncing around in the trunk of your car! They will last for many years if you shop right and care for them properly.
5) Learn about the difference between torquing in aluminum vs iron. Torque sequence, angle, intermediate steps needed, and bolt stretch are also important factors. You should be familiar with the cause, effects, and remedies for thread galling. Next, the effect of Loctite, vs a lubricant (antisieze, light weight oil, ect) and when to use which one. Also don't EVER "hydro-loc" a fastener with too much assembly oil and gun the bolt in. You can actually pop the back side out of a threaded hole in a casting this way! I have seen it done on a Friday afternoon...
6) Finally, the use of extensions and adapters can also effect torque, as will the use of universal joints. All of these things need to be considered during assembly. I would also invest time to learn about threads, thread pitches, and torque angles. Also, all threads of any type have to be perfectly matched, chased, cleaned, and lubricated or sealed before the torque wrench even comes out of the box.
These are my opinions only. Please take them with a grain or two of salt and above all else HAVE FUN!
Edited by Crazyeights, 03 May 2014 - 11:23 AM.