/diy/ - Do It Yourself

>>1333851
I'm not him but let me explain a bit, in the traditional sear you have the mainsprings force pressing upon the sear at all times and then you have the sear sliding, now you have to remember that friction is force times coefficient of friction. Therefore with the traditional sear design you have all that force concentrated on that one spot at the tip of the sear that is in contact with the mainspring or whatever, no wonder that it'll round out quickly with plastics like PLA.
Now when it comes to the joint mechanism you notice that the sear isn't really sliding against the bolt before being released and you know what happens after it is released? It doesn't have a lot of force pressing on it, or rather there's nothing to keep it in place while the mainspring is pressing on it and therefore there is less friction on the sear surface. Now i presume that there will be more friction in all of those joints and whatnot but i believe that wearing will be very little since it is plastic on metal contact, very little friction and if you want you can even add lubricant on those surfaces.
And that is why i believe that the joint style system is superior for applications like this where we're dealing with materials that aren't very wear resistant and so on, if you had metal parts or tough plastics the system would just be an unnecessarily complicated one.