Posts by Linghunt

  • A new force in spearfishing gear

    Wonder how much testing and engineering went into the handle mount. Don't see any Acrylic screws to get sheared off.


    All of the different ideas are interesting, Pricing is interesting too. It's a free market out there, let's see how it goes for him.

  • Koah Spearguns

    Read this link below. The accident mentioned earlier in thread might be the one referenced in handle recall.


    Doesn't look like it was a sheared stainless screw failure to me. Any info in his modications would be interesting and ties into this thread.


    I'll pull a screw out of my Koah tomorrow and get some numbers on it as I promised earlier. Regular works gets in the way at times.


    Letter - Wongspearguns.com

  • Speargun with safety or without

    Here is a link of accidents, not much out there from what I found in cyberspace.


    Speargun Accidents?



    All of these tales and stories, reminds me of one important Safety rule, more important than any SAFETY.



    DO NOT DIVE with IDIOTS.



    Don't target Shoot/hunt with them either, Recalling a dive in the Dirt to get out of the way of a hot 1911 pointed my direction. (teenage lesson)

  • Speargun with safety or without

    Quote from popgun pete

    However some guns had very poorly engineered safeties that could be either "on" or "off" regardless of their nominal position and while they possibly secured the trigger that did not necessarily block the sear lever as the mechanism could appear to be latched when it was not, so applying the safety did nothing.


    A well engineered safety should confirm that the mechanism is indeed latched, otherwise it will not apply and that in itself is a useful feature for a safety to have.


    Pete, you made some very good points. if one is holding a piece of junk and can't tell if the safety is on or off, I would getting rid of the safety, probably the hold gun.


    I've seen the mech and safety of the JBL gun, sure did not think much of it. The safety was better than the trigger catch and spring design. oops.... I'm of track. :nono:


    One point to make; gunpowder based firerarms and spear guns can all kill you, but the tension loads on a spear gun are sooo much higher, the energy stored in the bands or compressed air.


    The energy in the powder is easy to control till you do the chemical reaction.


    It really is an apples and oranges deal unless you are the one in front of the muzzle. Saying OHHH Shite.


    If you have a well engineered safety that works correctly, is smooth, ergonomic, and all of that; use it when others are around, loading the gun, going thru surf, etc.


    I like having a safety. why not, an option. I'm out in the Northern California coast and just me and hunting, What safety, never heard of it. its locked and loaded. Unless I’m stowing it on my float and going for an Abalone.


    The other side of it. I got folks around, not just me. well the safety seemed to be a good idea at that moment for that dive.


    When I'm off treking thru the woods with a black powder rifle or centerfire, and just me... safety is on. I think I might be close to something, safety is off or the hammer is pulled back so I'm ready to rock.


    I don't touch off my primary trigger, so I just have the hair trigger on my Hawkins till I'm ready to kill. That trigger hair click has turned an EAR and got me a few nice shots over the years.


    Had to try to muffle that click at times, putting behind my back. $$%^^$#@ Safety


    But this is with me out with just me...


    If my boy was with me, then the safety would be on, till needed.


    Got a gun safety battle at home here. The Kid, 17 years old now wants to go to front sight next summer for the 4 day Hand Gun course.


    All he wants to do is play with gun, knives, sticks, swords, girls, karate and video games. At least he's not doing drugs.


    (I'm a revolver/lever action gun type BTW) He wants a Springfield XD 45, I want him to use my Browning High Power with typical thumb safety. The XD 45 moves towards the dialog we are having. Why I bring it up.


    Do the 4 day tactical shoot and flip your safety off/on 2000 times, the XD sounds attractive. I want him to have safety on/off BURNED into his Brain like he has with a karate block and counter punch stuff. Paint the Fence, Wax on Wax Off.
    Repeating the cycle over and over again so its a non issue. We continue to disagree on the XD, but hey If I loose I get to buy another gun. Still a win.


    Perhaps I'm just to old fashion, I still remember if I did not handle a gun right and do what my Dad (Hard azz WW2 marine) required, then no guns. Go play with your sling shot.
    Hell I was safety proficient before I even knew what a girl was. I just wanted guns and to watch Sea Hunt. At least my head was on straight.


    Any safety engineered well or done like crap, doesn’t change the fact that the gun should be handled like it could go off at any moment. One can’t assume anything, if you are looking down the barrel then all bets are off.

    On the positive side, there are not really too many accidents. At least ½ of those are Idiots, the others would be interesting to look at.

    I read CAOSHA Accident reports all the times, as I design high voltage electrical controls and automation, I like to keep up with what is going out there, It is just amazing how stupid and careless people are. And a lot of them are dealing with more dangerous devices than a spear gun.

    When I’m running a lathe or a Band saw or the skill saw, I think about cutting my hand off and focus that this is dangerous. Just my way to “Keep my mind right”. aka Cool Hand Luke

  • My Rollergun Mistakes and Lessons Learned

    This Brit one is pretty good, you will has no convert units, It has some good right ups on what is going on.


    Article: Speeds and feeds for drilling and reaming stainless steels



    This one covers a lot of coating on cobalt drills


    Cleveland Twist Drill Q Cobalt Drills Speed and Feed Recommendations



    Below is a Drill speed and Calculator to help


    Drilling Speed and Feed Calculator



    It will help give you a feel if you need to spin the hand drill or Drill press really fast or slow, and how big of a chip you need to take (How hard you push or not.)


    I've trashed a lot of bits drilling regular carbon steel, I tend to feed in to slow and work harden the material. I get used to stainless and forget.


    If your drill is dull, then sharpen it on the grinder, not that hard to do, probably videos on u-tube I would think.


    You probably have 316L or 304 series SS. guessing

  • My Rollergun Mistakes and Lessons Learned

    Looks good, you have been putting some time into that project.


    Cobalt drill do work better and last longer, but you can get away with high speed, just remember to think about your speeds and feeds for proper cutting. I only use the cobalt drills when I have a big product order.


    Lots of info on web, if you need a link let me know.

  • Koah Spearguns

    Quote from Dude george

    [quote='Don Paul','http://spearfishing.world/forums/index.php?thread/&postID=71862#post71862']


    Don I immediately contacted the builder after you alerted me to the above concerns(thanks) and he told me all his guns for two years now all have the handles recessed, I was very glad to hear that after reading your post as it is a 4 band 67" blue gun... I am now the owner of one of those guns as of yesterday :)


    Got my gun, Aug of 2011, and It's not recessed? You are buying the Koah blue water right?


    Recessing the handle to remove shear forces is the way to go..


    But total blame on the two guys getting there faces kicked in on just the shear force failure don't make sense. There has to be other factors involved. I will pull the numbers together later for you. It's in process.

  • Speargun with safety or without


    Very well said. You sound like a "front sight" type. watch a few front sight vidoes, the safety doesn't seem to slow them down.

  • Neptonics systems Josh Bad customer care!!! Grrrrrrrrr!!!

    Ohh Boy, Josh was taking a beating on this thread.


    I've deal with him and talked with him multiple times on the phone. Josh is a good guy, he just gets too much going on at times.


    Prompt response and customer service is a big part of business, and he misses that part of it when he loses focus.


    He just need to hire an Admin to answer calls / reply to emails and make sure folks are happy out there.


    Even if a shipment is going to be late, its nice to get a reply.


    This person can then whip him into shape and make his business even stronger.


    Needs to wear Safety Glasses too, when he's working in his shop with cameras rolling..... But hey, I'm not the Insurance company adjusting his rates.

  • What's Cooking

    I will add a few pics to get you guys going. Not going to out do the Bikini thread, but we will have to see.



    King Salmon fresh off the California Coast.



    Here is some back strap off an Elk I shot back in 2010. He was a young Bull, very good animal.



    This was a Black tailed Deer , Had a good week hang time on this guy in our portable 35F meat locker trailer for hunting.



    Smoked this hind leg of a lamb in the smoker, used rosemary I cut from a bush in front to season it.


    Whats for dinner at your house?

  • Koah Spearguns

    Quote from Don Paul

    I have had a couple washing down the tuna tonight, I didn't mean to be blunt...but some times it grets the point a crossed.


    All the best, Don


    Not blunt at all, no offense taken by me. Facts and thoughts to the point I like very much.


    Remember to slap me down a little if I over engineer stuff. Going to put a little energy into this one and get at the root cause of that, as best I can. I will beef my gun up some even thou it just sits in the closet.


    General question: what is the typical muzzle velocity of a spear with a 3 or 4 band gun? lots of factors, but typical speed is all I'm looking for.


    I'm washing down King salmon with a shot or two of Jack. Going to have to start a Food thread to go with the bikini one. lol

  • Koah Spearguns


    I got ya, if the design is going to fail and do that, more needs to be done vs milling a slot.


    Let me run this problem by some of my mechanical engineering buddies and Physicists I work with. As a simple electrical guy, bigger screws at a minimum, if not a bolt captured into a pressed in threaded nut.


    Taking the handles on and off the wood could get your face smashed in. I'll get back to you on this one. I pic of the busted gun would be great.


    My handle is coming off my gun. Thanks for the info Don.

  • Koah Spearguns

    Yes it looks sloppy, and the screws are not orthogonal either. not sure that inpacts anything, just looks sloppy. Not to be to picky... there is plenty of room to do that recess, 1/8" or more.

  • Koah Spearguns


    I agree that milling a pocket is a good idea vs just screwing the handle to the surface of the gun.


    So to make sure we are on the same page, did you see failures from the repeated shock causing the screws to loosen up then the screws shear off? or the screws sheared off with everything ridgid and tight?


    I don't think you are refering to the screws getting pulled out of the wood.


    Being in a saltwater environment corrosion might add to the weakening of the screws. I would think this would be minimal. We all wash and take care of our equipment. Impact on the wood vs the metal would be my guess.


    If we are talking a metal fatigue failure from repeated loading and unloading, that would be interesting. Th number of cycles and amount of actual strear force would have to be higher, I would think from a gut feel.


    Do you remember the size of the screws that failed, probably an 18-8 Stainless I would guess, not a zinc plated alloy steel.


    Let me look up some shear numbers on a #6 or #8 screw.


    Regards -John

  • Speargun with safety or without

    That negative about a safety is that some folks will use it as the "END ALL" and think they can do whatever they want if it's on.


    Proper weapon handling is #1 safety feature we all can agree on.


    I do like the safety on my lever action winchester being the hammer.


    Just like any safety device it has to used properly, and it can fail. I look at it as it will help reduce the chances of an accident if used properly.


    This is a good Thread, it has everyone talking about it and thinking about it, that will provide less accidents than any trigger blocking mechanical device.

  • Introduction, Northern California Diver, OEM manufacturer

    the strength of that Bronze clip is limited, they are just cost effective for most out there.


    Tensile strength of bronze or brass is about 10,000 psi with a 1/4" diameter, thats means a ~ 500 lb load before you start getting to the yield point. Calculation on a linear force, there is a curve to the clip so that works against that number.


    The ductility of the material is pretty good, it would probably bend and deform before a fracture failure.


    A 316L version is 4x more in cost.


    To get rid of the catching aspect, a locking stainless carabiner would prevent that, just more cost.


    Got me curious now, I might make a call the the Local Junior College and see if I can test a clip on their Tensile testing platform in their Metallurgy Lab, (I got an in with the instructor over there) would make a nice video loading of the Clip and see the Strength/Strain curve.


    Below is a different Clip I have used per customer request.




    Below is the standard cheap brass clip that everyone is referencing





    The Sharpe End isn't going to pull out, the S-Bend I pressing into the rod makes a solid connection, the point is angled down to not catch as easily. Anyhow, there are some pictures for ya.

  • Koah Spearguns

    Quote from Don Paul

    Is that Steve handle just flush mounted with wood screws to bear the recoil energy?


    I use a safety on all my guns, I have never lost a fish or shot opportunity. It is my personal belief a gun owner
    can remove OEM parts if they chose.


    Cheers, Don


    Just the stainless wood screws. That is a flaw in the design if it loosens up on you. I think they were about 1/2" long so a lot of engagement, Shear forces on the screws are not a factor.


    Have to think about it, if there is a better method.

  • Koah Spearguns

    Why not have a safety?


    The response time of the safety to get a shot off is so minimal, and think about all the time you are in the water with the gun and not shooting.


    It's just another level of protection. You never point a firearm or a speargun at anything you can't take the responsibility for shooting. We are all safe with these weapons. Has anyone ever spun around and allowed our muzzle to point at our dive buddy. Handing the gun to a diver in a boat so you can get out of the water. (unload bands first, but have you ever not unloaded it?)


    One should also keep the trigger finger out of the guard till you have a target to shoot as well. I know some let that finger wonder into the guard. then no safety, and not paying attention then a dear friend might be looking down the muzzle.


    I think of these guns like regular firearms, yet we are in an environment where one can't point it up for a safe direction or down. No real place to go with it. add murky water to the mix...


    Not wanting to mount my dive buddy on the wall, so a safety seems like another level of protection. A safety can fail so all of the other behaviors are required.


    Hope you guys don't go elk hunting and walk around with the safety off, so you can get your shot off quicker.


    Not shot anyone, but I have had guns pointed at me by accident, I'm diving in the dirt to get out of muzzle direction. then it was an oops , sorry about that, I was not paying attention.


    Can't be too safe is my point, Don't want one of those OOPS days in my memory for the rest of my life. I'll take the 1/2 sec delay on a shot.


    I will draw a sketch of the Cam, I put the gun back together before I took a pic. That was an oops moment.