Aloha Everyone
I don't normally post unless I feel strongly about a topic. In regards to triggers I have made several thousand! Designing and testing started two years prior to that, we have been producing these triggers over the last five years and we have a "zero failure rate"!
We actually produced the testing machine before even making our triggers that way we could test different materials. We use an extremely dense polymer for our housing and our sere and trigger is investment casted. During the design process the sere was the most difficult to get right we must have went back to the drawing board 6-8 times before getting it right. We wanted a sere and shaft configuration that was 90 degree locked into 90 degree angle to prevent any and all inadvertant shaft discharge. Measurements as small as .010" can make all the difference in the world never mind the geometry of making the sere and trigger working together. This is what I feel is beyond the capabilities of the "homesmith", filing on your sere is like playing with fire! Besides this would be my case in point; if you can file your home built sere the material you are using is way too soft! The rockwell hardness of the sere should "well exceed" the hardness of the 17-4 stainless steel shaft you are using. You cannot achieve this by simply copying someones design and having it laser cut. If your sere is softer than the shaft it is holding it will fail with time.
Last note, someone before I in this thread said that a trigger should have be 120% safe. This is very underrated, the average reef gun has approximately 150 lbs of force behind it (2 bands) that would make our trigger have a 800% -1000% safety margin. If you want to talk Tuna guns the average gun has about 400 lbs of force and our trigger would then have a safety margin of 300%. Think about this before making your decision, would you trust the safety of one of your children using your homemade trigger?
I hope this information helps
Rick Bettua
Aimrite Hawaii
I don't normally post unless I feel strongly about a topic. In regards to triggers I have made several thousand! Designing and testing started two years prior to that, we have been producing these triggers over the last five years and we have a "zero failure rate"!
We actually produced the testing machine before even making our triggers that way we could test different materials. We use an extremely dense polymer for our housing and our sere and trigger is investment casted. During the design process the sere was the most difficult to get right we must have went back to the drawing board 6-8 times before getting it right. We wanted a sere and shaft configuration that was 90 degree locked into 90 degree angle to prevent any and all inadvertant shaft discharge. Measurements as small as .010" can make all the difference in the world never mind the geometry of making the sere and trigger working together. This is what I feel is beyond the capabilities of the "homesmith", filing on your sere is like playing with fire! Besides this would be my case in point; if you can file your home built sere the material you are using is way too soft! The rockwell hardness of the sere should "well exceed" the hardness of the 17-4 stainless steel shaft you are using. You cannot achieve this by simply copying someones design and having it laser cut. If your sere is softer than the shaft it is holding it will fail with time.
Last note, someone before I in this thread said that a trigger should have be 120% safe. This is very underrated, the average reef gun has approximately 150 lbs of force behind it (2 bands) that would make our trigger have a 800% -1000% safety margin. If you want to talk Tuna guns the average gun has about 400 lbs of force and our trigger would then have a safety margin of 300%. Think about this before making your decision, would you trust the safety of one of your children using your homemade trigger?
I hope this information helps
Rick Bettua
Aimrite Hawaii