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 New Posts  Knot strength testing
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55s
Posts: 626
55s
   Old Thread  #8 2 Mar 2026 at 11.39pm  0  Login    Register
I find the whole thing about testing knots a bit more harm than good.

I would back myself to break 12” of 40 mono all day if my life depended on it. The steady pull I get but you risk burning and damaging the line even if you bed in carefully.as stated below you need to use a realistic length of main line which then makes the task even harder, a fish will never have shorter length than about 30 foot, but as it’s suspended by water you could tow a cow with most 15lb lines.

You then talk snags and stuff and I would far rather my knot went than midway between me and the fish. Tough lines for bars etc I get but this isn’t about knot strength.

I tear the rs out of everything so many years ago had the below prototypes made as proper pulley tools, it ihas a strong compression sprint in it and you can mark (paint) force on the side of the spring - when that appears out the sleeve - job done. If nowhere near the hook I always leave about 4mm tag - I don’t blob as I believe (not fact) this makes the end of mono brittle and likely to shatter.

Seeing as we (ct) designed this ages ago - I assume someone will Nick it and have copies on the shelves this spring (pun intended)

41-D78-C3-D-320-B-4-D31-9-CC8-F0-AF102-F50-C9
Baitman
Posts: 4881
Baitman
   Old Thread  #7 2 Mar 2026 at 11.30pm  0  Login    Register
Trilene knot
ip100
Posts: 12377
ip100
   Old Thread  #6 2 Mar 2026 at 10.39pm  0  Login    Register
In reply to Post #1
Some lines really don't like grinner knots. Try swapping to a Palomar
Craftycarper97
Posts: 111
   Old Thread  #5 2 Mar 2026 at 8.47pm  0  Login    Register
In reply to Post #4
Thanks, will have a look 👍
mark1009
Posts: 4644
   Old Thread  #4 2 Mar 2026 at 8.22pm  0  Login    Register
In reply to Post #3
Have a look at matt collins video on knot testing. Try using a longer kength of line and lifting a bucket of water, adding more water until the line breaks, then weigh bucket to get the b.s.
Craftycarper97
Posts: 111
   Old Thread  #3 2 Mar 2026 at 8.17pm  0  Login    Register
In reply to Post #2
Yep. Wetting and teasing it down rather than pulling up. When I’ve got the knot down near the swivel I start teasing the tag back a bit then pulling hand/ body force tight.
Not measuring pull strength with anything as I say using a lighter body and a puller on the swivel.
mark1009
Posts: 4644
   Old Thread  #2 2 Mar 2026 at 8.11pm  0  Login    Register
In reply to Post #1
Are you bedding the knot down properly after wetting it? Have you measured how much pull you are getting before it snaps. Is it snapping at the knot?
Craftycarper97
Posts: 111
   Old Thread  #1 2 Mar 2026 at 8.06pm  0  Login    Register
So just back in the game after a break and chosen Gardner GT HD 15lb to re-spool with.
Watched a couple of YouTubes re knot strength so tied a grinner to a swivel and then wound the loose end on a lighter down to about 6 “ and pulled steadily.
Tried it with two swivels also.
Anyway, the line snapped on every pull. Got some Touchdown at 20lb out from a tin from 2022 and it was a bit better but still broke although needed a bit more force which I sort of expected.
Is this the right way to test each knot or should I just cinch down. Never worried about it before but did have some lost fish but sure I’m tying the grinner correctly.

Does everyone exert pressure on the knots between the swivel and hook before casting out?
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