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- Dec 18, 2019
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- 6,447
According to Techniks, the torque specification on a ER40 nut is 140 ft-lbs. ER torque specs The dinky wrenches that are typically supplied are not very long. If your wrench is 1 foot long you need to apply 140 lbs of force. If only 9" long then even more force is required. If you just snug it with 30 lbs or so, you are nowhere near the spec. I get lazy and don't torque it down for many items, but if I want it to hold, I crank on it.