General question about torque wrenches

[Breako#]

Hello: I'm looking into buying a new torque wrench, actually two of them. One would be used for torque settings around 5-10 nm's, and the other would be used for torque settings anywhere from about 10-60 nm's.

I have been looking hard at the Hazet 5107 and 5108 models, which respectively have torque ranges of 1-9 nm's - 5107 model and 2.5-25 nm for th 5108 model. For the lower torque work of 5-10 nm's would you guys suggest it be better to go with the 5107 which maxes out at 9nm or the 5108 with the larger range? Also, if I do go with the 5107, is there any serious danger of ruining it if I'm consistently using it in the 7-9nm range which is near the upper limit of its range? thanks

 

[dnschmidt]

These are extremely low torque values. I assume that the first wrench would be 1/4" drive and the second 3/8" drive. I'd go with the 5108 as all (spring based) torque wrenches are most accurate in the middle of their range. Personally, I'd go with strain gauge based digital torque wrench and it wouldn't be much of a problem to find one with much bigger ranges than the ones you have mentioned. I assume you're from Europe since you're mentioning Hazet. Eclatorq has really good digital torque wrenches and these are readily available in Europe.

 

[6-Speed]

Torque wrenches will work at the upper end of their range with no problems, they are not as accurate at the low end of the range. If you're primarily going to be using 5-10 NM, why not get the 5108?