Which is the largest diameter 120;or 240. 3/0 or 6/0. And yes I know a 3/0 hook is smaller than 6/0
thanks
tom
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Which is the largest diameter 120;or 240. 3/0 or 6/0. And yes I know a 3/0 hook is smaller than 6/0
thanks
tom
The two measurement systems are not comparable. They both measure thread size but very differently. The "aught" system measures diameter of the thread. So 6/0 is thicker than 8/0.
The denier system is the weight of the thread per 9000 meters. 70 denier thread means 9000 meters weighs 70 grams. 140 denier weighs twice as much so it will be thicker if it is the same material.
Depending on the materials used, the weight will vary so there is no direct comparison between the two methods.
For Uni thread, 8/0 is roughly 70 denier and 6/0 is roughly 140 denier. I guess this could be used as a rule of thumb.
You can usually Google for fly tying thread size charts and find exact measures for most thread manufacturers.
That said.
The aught system is works ONLY within a given manufacturer. There is NO standard for the aught system and manufacturers can and have labeled their threads at a higher "aught" to make tyers think that their thread is stronger and thinner than a competitors thread.
If seeing is believing consider the hook below which has been wrapped with 40 turns of the thread. Compare the Uni 8/0, to the UTC 70, to the Benecchi 12/0, to the Gordon Griffiths 14/0, to the Veevus 14/0 and 12/0. These threads are all about 70 denier polyester and they have the identical bulk and they ALL BREAK within an oz. of 14 oz. tension.
Attachment 442038
240 his the largest you are showing, but most of use use 210 or 140 Denier thread.
Skip
Buckeye, that’s great info. I’ve been tying a while and never seen that comparison. Being kinda heavy handed I break the lighter threads pretty regular. I’ve taken one of my bobbins (I have 4) and spread them to give less tension for the lighter threads. The smallest I try to use is 140 unless I’m tying on small hooks, like #8 or smaller, or if I can’t find the color in the store that I’m after. If I’m tying saltwater bucktails, I’m wishing I had something heavier than 210 but I wouldn’t use enough of it to order up a bunch.
Great info that is a step above what I was looking for.
thanks
Tom
I'm just going to stick to what I know and use...Danville 210 denier flat wax thread. Works for me on everything I've tied so far. I have saved this thread though for future reference.
I blew Dave’s mind! :Rofl
Yup... I follow the KISS method. :Rofl