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which torque wrench to get?(7 posts)

which torque wrench to get?Duke249
Dec 23, 2002 7:40 AM
Alright, I've made the decision to get one of these. I have an ITM Millenium bar and stem and can't get them to stay put. I need a torque wrench to periodically check the bolt tension. After checking the ITM website, I see that they specify 7-8NM for the bolts on this stem.

I've found that Park Tools makes 2 different types of torque wrenches. Which one should I get for this application?
I bought...PsyDoc
Dec 23, 2002 10:32 AM
...the Craftsman 3/8" torque wrenches for $69.99. The wrench has performed like it should. I read a post awhile back on one of the message boards that once you set a fastener with a torque wrench, you should not go back and periodically check it as this puts additional torque on the bolt even though the setting on the torque wrench is the same. Something about the bolt "relaxing" a bit, but the torque level is correct.
Hey, Doc, I've always wondered. . .MisJG
Dec 24, 2002 10:36 AM
What kind of Doc are you? Are you a gynecologist? Just guessing from your screen name. . .
re: which torque wrench to get?BikinBob
Dec 23, 2002 11:27 AM
I have both. They're not all that expensive compared to the cost of broken parts, or injuries. I think the 3/8" version is the one you want for that application. It will function for all but the smallest fasteners, and has both n/m & in/lb increments on it. I like the beam-type, since it can be recalibrated easily.
As for the "re-torque" statement by PsyDoc, you can and should regularly check the torque on some key components (headset, stem, bars, saddle, cranks, to name a few). When you do this, you need to loosen the fastener 1/2-1 full turn, then take it back to the proper torque. Also, don't use your torque wrench as an all-purpose wrench-handle. Use a ratchet (faster anyway when using a socket) to bring the fastener close to torque, and the torque wrench to set it at the appropriate value.
If you find you have a problem with a fastener coming loose regularly, try using a drop of Blue Loctite on it. Use a smaller drop for a smaller fastener, larger drop for a larger fastener.

Spin on,
The ultimate cycling torque wrench!MrCelloBoy
Dec 23, 2002 12:47 PM
re: which torque wrench to get?VVS
Dec 23, 2002 8:51 PM
BikinBob got it RIGHT. I came to bikes from cars where the use of torque wrenches, especially with engines, is normal. After I bought my new bike, I immediately bought a torque wrench (with the correct range, much lower than for a car) and learned that most bike mechanics do it by feel. I felt foolish until I read that a lot of exotic handlebars were breaking last summer because the team mechanics weren't using torque wrenches....
Try Home DepotAlpedhuez55
Dec 24, 2002 8:39 AM
I bought mine at Home Depot, a 3/8 inch drive husky rench. It works fine and was about $20. It is a good Use the $15 you save for buy a good set of hex sockets. It is the type with the bar and scale. I think it will get the job done for you. It also has a lifetime gurantee.

Mike Y.