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All About Guns What's your weapon of choice, and why? Discuss the beloved speargun here! |
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05-01-2022, 01:28 AM | #31 | |
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Re: Ermes Avatar speargun handle
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05-01-2022, 02:29 AM | #32 |
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Re: Ermes Avatar speargun handle
The camera bracket holder base, which plugs in either way to the handle in order to change sides for mounting the camera, fits into a rectangular slot. This slot, which seems to me a not very good idea, is created by a metal insert that sits in the mould when the plastic is injected and when the item cools enough for the injection mould to open up this insert is retracted. That allows the item to be removed from the moulding die and no doubt there are a number of other inserts to produce the other gaps and hollows. If this insert is removed from the die then the rectangular slot will disappear as it fills with plastic, so no big change required to the dies. It could be replaced with an insert that just creates the two attachment holes rather than have them in a removable plug. My Dad made injection moulds as part of his job, so that is how I know something of them.
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05-01-2022, 07:09 PM | #33 |
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Re: Ermes Avatar speargun handle
Thanks for the info. I have the skill set to make a thumb rest, it's not a problem, but a big part of the appeal to this handle IMO is that it looks ready to go right out of the box no modifications needed (for righties at least)
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05-01-2022, 07:27 PM | #34 |
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Re: Ermes Avatar speargun handle
You can barely sell a cup of coffee in the US without including a warning that it's hot.
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05-01-2022, 10:20 PM | #35 |
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Re: Ermes Avatar speargun handle
Will this Handle/Mech fit a US Square Shaft? It doesn't seem to want to fit the ones I have here, I know there's not a complete standardization of US Shafts, but 99% of them will fit into a US Mech like a Neptonics?
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05-01-2022, 10:39 PM | #36 |
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Re: Ermes Avatar speargun handle
I removed the thumb rest from the left hand side of the handle, it is held on by a self-tapper Pozidriv #1 countersunk screw. The handgrip underneath mirrors the other side exactly. The thumb rest interior has two lugs that press into the soft grip handle's recesses at the top, the self-tapper passes through one of the lugs and goes into a hole in the handle. A photo of its inner profile is attached.
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05-01-2022, 10:46 PM | #37 |
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Re: Ermes Avatar speargun handle
What goes in will depend on the nip between the top of the roller "tooth" and the sear box roof. Eurogun shafts have flat top tails and an arc cut-out for the spear tail notch, a US shaft will not fit if the thinnest part of its tail end in the vertical dimension is too thick to fit inside that nip.
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05-02-2022, 01:35 AM | #38 |
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Re: Ermes Avatar speargun handle
I really didn't try that but in the original beta version the tolerances were very tight that even some euro shafts did not fit properly. So there was tolerance added to make it fit all tested Euro shafts. The DR trigger will work ofcourse with square cut shaft as fundementally it is actually a better fit for the DR trigger than euro cut shaft. However there are so many variables with different shafts ... then add to that the different variables of track height of different pipes ... and chances are that it won't work without some modifications. I personally think that for absolute best results the shaft should barely be able to enter the mechanism ... this tight fit ensures that when you shoot, the shaft does not have to jump on the track ... and thus goes out smoothly. This gives super stable shaft flight with very high accuracy and of course very little loss of velocity as the shaft goes through water ... so more retained power downrange without having to add more band power. So best is give it a try and see if the shaft fits ... if it does then it should work just fine ... if it doesn't you have to use maybe a smaller back roller ... say 6.75mm.
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05-02-2022, 02:43 AM | #39 |
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Re: Ermes Avatar speargun handle
If you want to find out the nip size latch the mechanism and push a thin tapering wedge with the flat base up against the sear box roof and see at what point it jams the roller down in its cup on the sear lever. The roller tooth will mark the wedge where it jams and you will then know the height to the sear box roof. Pull the trigger to drop the sear lever and roller tooth in order to get the wedge out which can be made of wood or anything that will mark and not overly crush.
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05-02-2022, 01:42 PM | #40 |
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Re: Ermes Avatar speargun handle
Thanks popgun pete for posting your pictures of the handle, comparing the Huntmaster and with the thumb rest removed. While I'm generally right handed, I shoot left handed as I'm left eye dominant. I actually prefer the universal grip as it allows me to shoot with my right if need be.
I installed Mario's DR trigger mech into my MVD handle, so it does operate similarly to the Ermes handle already. If I had to be picky, I would like to see a deeper or more recessed anchor point for the roller/invert roller hook. Similar to the MVD one. I typically anchor two pairs there and it's a solid hold. It's hard to tell if the Ermes anchor would safely hold two pairs (two dyneema wishbones. |
05-03-2022, 12:27 AM | #41 |
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Re: Ermes Avatar speargun handle
I wet the “Avatar” handle down so that things would slide more freely and removed the stainless steel grub screw using a 1.5 mm hex key. The camera support insert is a very close fit, so I used a rectangular plastic drift and a soft faced hammer to tap it free while pushing on the flat surface between the two holes in the insert. A couple of light hits and it was free. You can see on the top face of the insert that there are three alternate positions marked with holes for different offsets, although the reality is you could clamp it down anywhere with the grub screw provided you drilled another hole. When you push the insert back in it needs to go in square as there is no side to side rocking as it is an exacting fit with zero gaps. Hats off to the injection mould makers!
Last edited by popgun pete; 05-03-2022 at 12:36 AM. |
05-03-2022, 02:01 AM | #42 |
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Re: Ermes Avatar speargun handle
Now you can see inside the rectangular slot there is a parting line in the center, so this may be two fixed pegs in the moulding die rather than an insert as I surmised before. When moulds are brand new there is next to no flash as the die parts clamp together with no gaps.
The small bumps on either side of the rectangular hole are what make the insert a tight fit, they are present on both sides of the handle. Because the handle was wet before I took the photos a few residual drops can be seen in places. Last edited by popgun pete; 05-03-2022 at 06:35 PM. Reason: more info |
05-03-2022, 11:10 PM | #43 |
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Re: Ermes Avatar speargun handle
Without pulling the trigger mechanism out of the handle I think that this must be the one being used. It has the same trigger and the small windows in the housing sidewalls. The name stamped on top will be different. Huntmaster may not be using it yet as no mention of it on their website, at least not when I last checked.
https://ermessea.com/products/hunt-m...-double-roller |
05-04-2022, 03:34 AM | #44 | |
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Re: Ermes Avatar speargun handle
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05-04-2022, 03:56 AM | #45 | |
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Re: Ermes Avatar speargun handle
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Of course I looked at all these things and couldn't help but think that it would be great if a universal shaft would be designed ... this would be the best of both worlds. This would make it by far the strongest hold on the sear as it would not have the 90 degree cut of american cut (could cause crack propagation) and yet will be the most robust euro cut ever. Best of both worlds! However it is hard to get everyone to switch ... but it would be a huge advantage for all if the shaft notch would be standardized to this new version. You can see my idea in these pictures which compares a Riffe american cut with a Hunt Euro cut ... this would be by far the strongest of all (top is Riffe American cut ... middle is proposed ... bottom is Hunt Euro cut). |
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