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Old 07-21-12 | 09:49 AM
  #4  
FBinNY
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Joined: Apr 2009
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From: New Rochelle, NY

Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter

Using generic torque specs is worse than not using a torque wrench at all. There aren't and cannot be generic torque specs that are at all meaningful. A proper torque spec. has to be based on a specific engineering goal, such as clamping strength, and based on the diameter and pitch of the fastener used.

One of the worst places to apply a generic torque spec is on bearing adjustments such as headsets. While the screw is fairly standard (M6x1), the proper preload pressure of the bearings varies tremendously depending on the type and angle of contact. The same load that may be inadequate for one type of headset will overload and rapidly destroy another.

Rather than blindly applying what may be inappropriate specs., learn what fasteners feel like, and use the minimum torque that's sufficient to meet the goal, ie. keeping a seatpost tight enough not to slip or twist.
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Last edited by FBinNY; 07-21-12 at 10:00 AM.
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