Powder River Precision Striker Safety Lever Kit

[Nosrac]

Concyted, I like your temp mod and plan to use it when my kit arrives.

[zifos]

I drew this diagram for reference, not to scale or anything. Link just incase it doesn't show up.


Picasa Web Albums - Michael - random

F is the force pushing agains the screw. If the screw is at an angle then F can be divided into component forces x and y. x is parallel to screw axis and will be pushing agains threads.

Component y will be perpendicular to screw axis and will be pushing the screw sidewase against the hole. This will induce a momoent (torque) about point A which will lead to a force at point B. The larger the percentage of screw that is in the hole the smaller the force at point B.

I think Daniel's point is; if the screw is at an angle part of the force (F) will be diverted to pushing the screw sidewase against a large solid block of plastic. Leaving only part of force F to push against the threads.

You'll find that in most applications the force being applied to screws is perpendicular to the screw (or bolt). For example if you hange a picture on the wall you put one screw in the wall and the picture pulls straight down, perpendicular to the screw axis. This configuration is much stronger then pulling straight against the threads. In cases where that is the only convienent way to do it, more and bigger screws (bolts) are used.

Yes, I am a mechanical engineer.

[Conceyted]

Originally Posted by zifos

I drew this diagram for reference, not to scale or anything. Link just incase it doesn't show up.


Picasa Web Albums - Michael - random

F is the force pushing agains the screw. If the screw is at an angle then F can be divided into component forces x and y. x is parallel to screw axis and will be pushing agains threads.

Component y will be perpendicular to screw axis and will be pushing the screw sidewase against the hole. This will induce a momoent (torque) about point A which will lead to a force at point B. The larger the percentage of screw that is in the hole the smaller the force at point B.

I think Daniel's point is; if the screw is at an angle part of the force (F) will be diverted to pushing the screw sidewase against a large solid block of plastic. Leaving only part of force F to push against the threads.

You'll find that in most applications the force being applied to screws is perpendicular to the screw (or bolt). For example if you hange a picture on the wall you put one screw in the wall and the picture pulls straight down, perpendicular to the screw axis. This configuration is much stronger then pulling straight against the threads. In cases where that is the only convienent way to do it, more and bigger screws (bolts) are used.

Yes, I am a mechanical engineer.

I just got all giddy and my head started spinning. Thank you for the detailed response. Tis makes great sense and your example at the end makes complete sense, as well. BRAVO!

[Nosrac]

I just got the kit and installed the screw anyway. It was no big deal. When looking at the pictures I thought it was a lot bigger diameter allen screw. I was surprised when I received it that the screw was sooo tiny. That tiny little hole in the frame didn't bother me and yes, I am OCD and very picky.

I mic'd everything so I knew the stock function and then transferred it over to the new safety lever and travel screw. I only had to make a slight 1/8 turn on the screw after I had mic'd it in. It all works great. A bright light down the sear hole allows you to see when and how far the striker safety releases before the break and to make sure it's functioning properly.

Nice mod...love the trigger.