PVC Crossbow X-Bow Trigger Mechanism (Pt. 2/2)
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PVC Crossbow X-Bow Trigger Mechanism (Pt. 2/2)

August 14, 2019


What’s up guys, thanks for joining us today in our previous video we showed you how to build a body of a crossbow using a 2×4 some PVC for the bows and some paracord for the string well today We’re going to cover how to build the trigger mechanism And how to build your arrows the trigger mechanism has two main parts And we’re going to be building those out of this 3/4 inch plywood We also have a couple of wooden dowels and these have two purposes first They’re going to be used as the hinge points for the two pieces of the trigger And then we’ll also build our arrows out of them We can’t very well use our crossbow until it’s got a trigger So let’s get started to get some basic measurements for our crossbow trigger pieces. I’m going to remove the two bows from the body Now I’m able to lay the body of the bow down flat on the table which is gonna make this easier as I said before The trigger mechanism has two main parts one of them is going to be a sort of wheel with teeth on it on an axle And that’s going to be what actually catches the drawstring when you pull it back The second piece will be what we actually think of as looking like a trigger and that will be another piece of wood that’s on a hinge that stops the first piece from Rotating it until we want to I’ll draw out the shape of the first piece of the trigger on this piece of plywood but before I do that I’m going to drill a hole into the piece of plywood The right size for the axle the hole is going to come first because I need everything else lined up around that bowl correctly I’ve got a 3/8 inch dowel so I’m gonna be using 3/8 inch drill bit to match All right after a quick test our 3/8 inch dowel fits into that hole very snugly Probably end up sanding down the dowel. Just a little bit to make it so it can spin a little more freely on that axle Here we have the basic shape of our trigger mechanism the hole will be down Inside the body of the crossbow this notch down here is where the trigger mechanism Will stop this whole device from spinning until we want it to you can see that the notch on top is in front of our axis and The notch on the bottom that stops it from spinning is lined up with the middle of the axis I’ll do a rough cut to remove this whole block of wood, and then I’ll start getting in the details and the curves There we go, we’ve got that basic shape cut out It’s looking pretty good since this little notch is what the bowstring is going to wrap around we want that sticking up above the body of the crossbow I Now have this flat portion of the trigger mechanism lined up with the body of the crossbow I’m just going to mark where that hole is There we have it now. I’ll drill that out on the drill press I’m using a drill press rather than the handheld drill because it is important that the drill hole goes straight up and down as much as possible Now it’s pretty good Use a piece of this dowel and fit it through both the trigger mechanism And the body here just to hold the trigger in place as we measure for the next piece For all the moving parts to fit together Well, we need to be pretty precise on how our next trigger piece fits into the first one So I’m going to use this piece of paper so we can trace the exact intersection of where the two pieces meet now I’ve got the paper lined up so the corner fits right into this first notch that was cut Sort of folding the paper around the body of the crossbow a little bit, so we can tell where the wood ends now We’ll have our main trigger come down just a little bit below that first notch right about here And we’ll have it extend about an inch and a half long right about there We know that we need our hinge point to be in the middle of this extended piece of wood It shouldn’t matter extremely precisely where but we want the whole hinge mechanism to be behind the first piece of our trigger That’s an approximation for it. We’ll go All right now. We know about where our hinge Hole is going to go and we know that it lines up perfectly with the first piece of our trigger now We can remove the piece of paper and finish out the shape of our whole trigger mechanism I’m going to cut out the piece of paper with the drawing of our trigger on it And I’m going to use some spray glue to adhere that to our 3/4 inch piece of plywood alright and once again I’m going to drill out the hole first and then cut the rest of it out With the first piece attached with the temporary dowel and the second piece all cut out with the hole drilled I’m going to mark where to drill the second hole into the body You can now see the basics of how the trigger mechanism is going to work when the bowstring is drawn back and behind this notch It will be holding pressure Which is pushing against our trigger? When we pull our trigger it drops the bottom piece out of the way and the top piece is then able to swivel Letting our bowstring fly and launch our arrow Now we have our two pieces cut out and we have the holes drilled for the axles to make them work But we need them to fit inside the body of the crossbow Properly haul out space for our two trigger mechanism pieces inside the body I’m going to use this drill bit to make two holes that go all the way through the 2×4 and then use a Jigsaw to connect those two that should give us a nice slot all the way across just measuring how far You need to have space That should be in front of the first trigger mechanism very back of the second trigger mechanism It’s right about here And out there so we need to remove a slot about that size for a trigger pieces to fit inside Seems to be working pretty well I don’t have a very deep plunge depth on this particular drill so it’s gone down as far as it’s able so I need to Now raise the platform up so that I can drill the rest of the way through Build a fair portion of the way through but another problem I have is that this drill bit is not actually small enough to fit through the hole in the plate I’m just going to leave this hole started with the drill press and then I’ll finish it off with the hand drill Now I’ve got these two holes drilled out, I’m going to use a jig saw to cut out the gap in between them There we have it we now have a hollowed-out portion where our two pieces of the trigger? Can swivel and function see that the pieces fit through pretty easily? Got lots of good range of motion there Everything we want with all of our pieces cut out and ready, let’s do a test fit I’ve got a couple of pieces of dowel And I’m gonna sand them down in the middle so that our trigger pieces will swivel more easily on There we go, that’s swiveling just how we want it Perfect tension on this tooth up here when I pull the trigger It releases There we go you can see the string is being held by the trigger See what happens when we pull Hey, that’s what we want to happen perfect now that we know the bow is working and the trigger mechanism is working Let’s make an arrow and make it fit on the bow to start making our arrow We’ll use a 3/8 inch dowel To measure the total length that we want it to be from the back of the notch and our trigger mechanism to about an inch And a half maybe 2 inches in front of the crossbow I know a hacksaw isn’t really designed to cut through wood, but on small pieces like a dowel it actually goes very quickly They just have to stick the price tags on so well Now they got the price tag off Let’s add a knock to the back of our arrow a knock is the little gap that fits over the bowstring Now that I have the knock carved into the wood I’m also going to sand down the two different faces so that it fits on the bowstring more easily Now when our drawstring is around our trigger You can see that at this point the arrow doesn’t really have a way to reach on to the drawstring itself so what we need To do is cut a small notch out of this piece of the trigger With the notch cut our arrow can now fit onto the bowstring without the interference from the trigger mechanism With the knot cut I’m just going to quickly hit the rest of the arrow with some sandpaper to smooth it down One more step to make it slightly easier to use a crossbow as we want to carve a shallow channel From the front of the crossbow to the trigger mechanism that our arrow can rest in There we go the knock is cut into our arrow We’ve grooved out a little bit of a channel on the body of the crossbow now Let’s add some fletchings or feathers to the back of our arrow now using tape with rubber gloves It’s kind of a nightmare So I’m gonna lose them for a second as I make the fletchings for this arrow the design is pretty basic We’re just going to take a folded over piece of tape with edges left on it and attach that to the arrow itself Fold this nicely in half If we have our arrow fit inside the crossbow the way we want it with the nock pointed up and down we want one of The fletchings to be pointing straight up Obviously I have a little bit more tape here than as necessary trim some off Now that doesn’t look very much like an arrow So let’s take our knife and trim it down to smaller and give it a little bit of that classic feather shape to it We’ve got one feather on our arrow. Let’s add two more on the sides It’s looking pretty good now. Let’s add some weight to the end of our arrow So it will fly point first every time now as a weight I’m going to try and put this screw into the end of the dowel So I’m gonna pre-drill a hole and then add the screw now of course it is pretty tricky to drill perfectly straight into a dowel I’m giving my best shot I Tried to pick a drill bit that was almost as large as the threading on the screw So that well, it does still bite into the wood It’s not really pushing it apart any because I think it would just split if it did that There we have it. It’s not the most dangerous Arrowhead to ever made, but that’s actually my goal I don’t want to make something that I’m accidentally gonna kill someone with so this will still give it some weight. It’ll fly true It’ll Pierce into fairly soft targets, but I’m not likely to really cut anything up I’ve marked off on this dowel a couple of spots that are the same width as our 2×4 so when I cut those they should work as the hinge pieces for our trigger without extending to the sides at all There we go that spins fairly easily just I want it, let’s install this Right String this back up take it outside and see if it’ll fire there we go. We’ve got our trigger mechanism working We’ve built our arrow. We’ve got a target. Let’s fire this thing at it. Oh Oh Short get a little bit more loft to it this time since I was a little low before Shooting into the wind now – that’s not gonna help Ha hit the target again Take that target almost the bullseye three two one oh That almost went through a shot I’ve already taken See that do that Just turned into one bigger. Hole Oh Oh, it’s like half way worse That steam hole again, that’s a three-fer I still missed Bullseye got it ha Turns out I am NOT very good at archery even with a crossbow all right We know that our crossbow works our trigger mechanism works our bow works and our arrow works So I think the last step is going to be decorating this thing to make it look really nice There we go we’ve got our crossbow Fully decorated I used a rubberized paint on the bows So hopefully that won’t crack as the bow bends my wood stained everything that was wood And I think this looks pretty slick now like we’ve got nice green wood nice dart boughs this thing looks great Some of the design of this crossbow was shared with me by my friend Taylor I want to give him a quick shout out Thank You Taylor there you have it now You know how to build a trigger mechanism an arrow for your crossbow in a different video We showed you how to make the body the bow and the strings so you put all this together And you will have your very own Functioning crossbow a couple of notes of safety that I hope you’ve already realized but never point your crossbow at a person or another living Thing don’t point it at things that can get broken or damaged point them only at designated Targets when you’re in a safe area, and you can’t accidentally hurt anyone This is not an ultra-powerful crossbow with a 100 plus pound draw That’s gonna shoot right through a lot of stuff, and it has a blunt tip so it’s not the most dangerous Type of bow and arrow in the world, but it can still hurt someone so if you build one be very careful with it Thanks for joining us for this video today, and we’ll see you in the next one talk to you then It just pops the foam at leas like assortment of foam cones on the ground everywhere ow You You

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  1. Okay I just want to point out that us no where near 100lb draw weight….a draw weight is how many lbs of force it takes to draw the bow. That's at best 20-25 with a very slack string. Not trying to bash, just trying to correct….ps. dont dry fire bows even if it is just PVC it puts strain on the limbs and can eventually cause them to fail.

  2. What I don't like about the design of the crossbow is that the cord plane is below the plane where the arrow sits. So the string needs to go over the arrow's cradle and rubs on the wood a lot. Not nice in that regard. But hey.. its PVC and wood anyway. Its a nice build!

  3. Am I the only one who wants to see you tie kitchen a knife on the end and shoot it at a balistics dummy? Yes? Ok then I'll just stand over here and hope nobody puts me on a watchlist.

  4. Maybe you should amend somewhere else. Looks like you might miss and hit someone in the head walking on the other side of that wall

  5. Una cagada 👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎👎

  6. I'm really curious if you could make a, what's it called… pulley trigger? The kind that requires winding and gives hella tension to the bowstring.

  7. ive been uaving trouble with trigger mechanisms in my own personal projects. Ive made absolutely astonishing crossbows beautiful. I have a few that are hand made that anyone can use but they were all useless because of no trigger mechanism.

  8. that big knot in the stock is so prominent in the videos. i'm willing to take bets for how long it will take for that knot to break.
    I figure after 100 shots.

  9. بما ان السهم ينطلق بخط مقوس هذا يعني انه ليس قوي اذا كان قوي ينطلق بخط مستقيم ، واظن انه الهدف الي تم موضعة ليس خشبة وانما شي ضعيف وهش لذالك قام بطلائه باللون البنفسجي

  10. I am always wondering why people don't sand the sides of the crossbow body more to look far more slim and more professional.Sure, it's unnecessary .. but aren't looks mainly what building toys are all about?

  11. The bow needs to be higher because the drag on the wood decreases force a lot more than you’d think and you should use a non flexible string the tension comes from the bow arms

  12. Tips to make it more powerful: Do a proper recurve. Recurves don't actually look like that when the string isn't attached, in fact they are curved entirely in the opposite direction. If you want it to be even a bit more powerful, keep it straight and just curve the ends. Still not real recurve, but closer.

  13. I feel like this crossbow would be more effective with shorter and fatter Bolts, because the bolts would way my but probably wouldnt glide as easily as arrows, but you can get more powet with bolts so the wind wouldbt knock it off course as easily

  14. But if you wanted to make it dangerous you could cut the blunt end of the screw off and thread an arrow head on.

    Like If you wanna see that happen

  15. A crossbow arrow is called a bolt. dry firing a bow of any kind is very bad for it and can cause explosive like breaks resulting in shrapnel also crossbow bolts generally don't have nocks like an arrows… fletching on bolts are called veins and should have a twist to them to make the bolt spin… But regardless of all the wrong terms and bad practices it is nice to see people get interested in archery

  16. I’m going to build a bunch of these and sell them at a flea market as kids toys for 35 bucks a pop I can get all the material for free

  17. Do you still have the crossbow you made? If you do and if you have no use for it would you mind sending it to me please?

  18. You could easily make this more powerful with a stronger bow and better arrows that trigger mechanism will hold up

  19. I do need to know if this can be used for LARP (live action role play) we want to bring crossbows into it but we want to make sure it would be save enough with LARP grade arrows.

  20. When you pointed out you hit the spot where you'd already hit reminded me of this. When I took the course to get my Ohio Concealed Handgun License in 2012. At the live fire range, we only loaded 5 rounds. I have a 1911 45 acp handgun. We fired at 25 feet at a sheet of 8-1/2 x 11 inch piece of paper with a black circle in the middle. After firing my 5 shots, there were only four holes within a 3 inch circle around the black target spot. I was scolded for missing the paper. After a close inspection, I told the instructor to take a closer look at one hole, it wasn't round but slightly oval shaped. Turns out I didn't miss the paper but put a second round through same spot. He laughed and said he was sorry he scolded me!

  21. It is a Toy,The poundage is 12 to 15 Lb at the most,Real weapon should be 55 to 125 or more Lb. Nice for deco or a kid.

  22. Watching that trigger set being made, I'm reminded of the cartoon where entire trees are used to make one elevator button… Also cringed when the straight edge of the trigger was not placed along an already straight edge on the board. Cut one straight line for the price of two!

  23. Don't teach people to dry fire a crossbow its a disaster waiting to happen ever seen a crossbow blow up i have not pretty

  24. I was wondering what kind of speed you are getting. Have you ever tried shooting your crossbow over a chronograph? I would like to see the results.

  25. Holy Norm Abram!!! You should NEVER wear gloves when wood working. If the gloves get caught in the bit or blade it will drag your hand into to it!!! Plus a jigsaw when you have a drill press. Use a mortising bit.

  26. Just saying never dry fire a bow or put your hand in front of the string and fire btw someone try cutting something with a bow string being released

  27. Dude I highly doubt that your crossbow has enough draw weight to actually take down an animal or be used in defense. Great job tho you made a lovely novelty item. You should be able to hear those bolts slapping hard against anything they hit and I can tell by watching they aren't flying down range at very many fps ♠️

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