Sounds like you got a rocking deal on a great tool! My manual seems to list all three but Nm is first choice. Sometimes I wish I was bilingual - fluent in metric and English.
So my assumption that more than one wrench is best is a good one. Thanks, bronco! Now the question is which one(s)... I'm going to have to look through my manual thoroughly and figure out which jobs are most likely to be mine. Then it seems like a good first wrench would have a solid range for those jobs well before getting to that 20% lower limit.
Yes sorry meant to answer this sooner but got busy at work....
for the range you posted, your going to need two..
But need three really.. 4 Nm = 3ftlb = 36 inlb... to get a TQ wrench that will do 36 INLB, your talking $250 or more, and it will top out at about 50 inlb.. It is a tool you will rarely use, is easily damaged, and pricey. Most times a calibrated set of fingers and a 1/4" drive ratchet will get you by along with some anaerobic thread locker.
The one place i do not fudge with that process is when the small fastener is providing a critical clamping force, more then just to keep the fastener from coming off.. Like the nut on a fork valve stack. Other then that wing it.
So really you need a 3/8 INLB TQ wrench and a 3/8 FTLB TQ wrench to cover your scale.. then add a 1/2 FTLB TQ wrench and your good... for a littler larger stuff.
What brand??? well.. I used Craftsman for a long time, and it worked well enough to teach me what was what when tightening fasteners. As those wrenches failed I replaced with snap on.
Torque Wrench, Adj. Click Type, U.S., Fixed-Ratchet, 40-200 in. lb., 1/4" drive
Stock #: QD1R200
$249
Torque Wrench, Adj. Click Type, U.S., Fixed, 20-100 ft. lb., 3/8" drive
Stock #: QD2100
$264
Torque Wrench, Adj. Click Type, U.S., Fixed, 5-75 ft. lb., 3/8" drive
Stock #: QD275
$264
Torque Wrench, Adj. Click Type, U.S., Fixed, 30-150 ft. lb., 1/2" drive
Stock #: QD3150
$294
Thats low buy in priced Snapon. you can go a bit higher or a lot higher.
IN something like craftsman (the lowest quality I would go)
Craftsman Microtork® Torque Wrench, 25-250 in. lbs., 3/8 in. Drive
$80
Craftsman Digitork® Torque Wrench, 5-80 ft. lbs., 3/8 in. Drive
$107
Craftsman Digitork® Torque Wrench, 25-250 ft. lbs., 1/2 in. Drive
$107
Notice there is no 1/4 drive option.
Those Craftsman wrenches will not last as long (few years if used weekly or more)
Often can not be re calibrated if over TQ'ed, dropped, or left set at a high end of scale for a long time (always tune the scale back to it's lowest setting when your done) (truthfully, the same is true of Snap-on TQ wrenches most times)
BUT they are a good buy in, at reasonable cost and they do work.