AXSR Action screws

Trigger Monkey said:

Looking at the whole page of the manual, it recommends using a 5/32" ball end wrench for fastener #2 so I'd think if A.I. is putting it in their manual, they've determined it to be safe, just don't use a junky bit. I use an extended 3/16" ball end bit from Fix It Sticks to torque the action screws on my AX AICS chassis to 65 in/lbs and have never had any issues.

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I saw that, it’s just counter intuitive, not that my intuition means anything. It just seems from a mechanical standpoint that the applied torque would be different between a bit at an angle versus straight on.

Trigger Monkey said:

You're overthinking it.

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On a forum where people choose scopes based on ounces and worry about few fps muzzle velocity? A better name for this forum is OCD Central .

About the overthinking. I talked to two engineers I know, one structural and the other aeronautical. They both said the same thing (as I understood). Using a ball head driver will result in a decrease in torque for a given torque input to the driver because the torque is being applied off axis from the fastener, the greater the angle off axis, the greater the discrepancy.

So, the action screws on the AXSR are supposed to be torqued to 49 in-lb, if you set your torque wrench to 49 in-lb and use a ball head driver and the driver is off axis relative to the fastener then the fastener will be tightened to a value less than 49 in-lb. They also said that there isn't a standardized correction factor. My AXSR shoots just fine with that one fastener being set to an unknown torque setting, it just seems odd that a company like AI would create a design where a deterministic variable like a specific torque setting is now just another variable with no definition.