Skylon Paragon point issues

dvd8n

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Interesting ideas. I will get some Bohning Blue and see how that works. The Easton seems a stronger bond though. The Bohning certainly sounds great for pins.

I really don’t like the idea of needing to scuff point shanks and the inside of shafts. That should not be necessary. Wipe with acetone/alcohol yes - scratch to crap no 🤪 It is also very difficult to find tools that will go up a 3.2mm I.D shaft without going fairly specialist (£20 for a wire brush territory)

The shank on the Paragon 100gr is short BUT they are about 1cm longer than the Easton X10 Tungsten point at 100gr and I never had one of those pop out (you would have heard me cursing) - however that is a Tungsten/Aluminium bond rather than SS/Carbon.

My theory - untested and unproven (possibly idiotic) is… When I look at a used Easton point the shank measures around 3.17 to 3.19mm diameter. The Paragons are similar at the point but most have a taper down to around 3.12mm at the break-off end (a few are more like 3.13 or 3.14mm). All points have residual hot melt - so what glue is left is included in the measurement. Take a new Paragon point and it is parallel 3.11mm all the way. And so is the Easton. So, hypotheses 1, something about the point fit in the Paragon shaft is pushing more of the hot melt to the point end - so when you break them down very short there is insufficient adhesion. With a longer point it becomes enough. (And oddly the break-off sections are 3.12mm which is only going to help + the ridges that fill nicely with goop.) Alas I don’t have a tool capable of measuring the true internal diameter of each shaft.

So you need monster gobules of hotmelt on the end of the point to try and overcome the scraping down… or something like that. I think Easton used to say put a glob in the hole before you put the point in.

As the 120gr seem to be going OK I might just stick and play the hand I have.

Stretch

I have to admit that I prefer to think of it as lightly keying the surface rather than scratching it to crap...:D
 
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