At the risk of looking like a complete clown... 
I'm trying to be scientific and calculate how much backing line I need to load two spools with, to then top them off by splitting half a spool of braid onto each. I've done this before and it seemed to work out OK, although this time around I can't get my head around it. Bear with me here...
Spool capacity is stated as 230m/0.4mm, or 340m/0.35mm. Now this is my first stumbling block. 0.35 as a percentage of 0.4 is 87.5%, so in theory if I wound on 230m of 0.35mm mono the spool would be 87.5% full. Rough calculation (230/87.5 x 100) means 263m would be needed to fill the spool with .35 diameter. So how does the stated capacity of 340m/0.35mm make sense here?!
I think the last time I did this, I worked it out something like this:
Spool capacity = 340 x 0.35 = 119
I buy a 300m spool of 0.33mm, so 300 x 0.33 = 99 backing.
Capacity 119 less backing 99 leaves 20.
Braid I am using is 0.19mm diameter, so 20/0.19 = 105m of braid on each reel.
However, if I had used 230m x 0.4mm as the calculation for the spool capacity, that only comes to 92 (230 x 0.4).
As I say, I spooled some reels up earlier this year using a method similar to the above and it seemed to work out OK, but I just cannot get my head around it this time because of getting different values for spool capacity.
If a spool held 100m/0.4mm, you would expect the capacity with 0.2mm to be 200m, no?!
Someone please put me out of my misery!!
I'm trying to be scientific and calculate how much backing line I need to load two spools with, to then top them off by splitting half a spool of braid onto each. I've done this before and it seemed to work out OK, although this time around I can't get my head around it. Bear with me here...
Spool capacity is stated as 230m/0.4mm, or 340m/0.35mm. Now this is my first stumbling block. 0.35 as a percentage of 0.4 is 87.5%, so in theory if I wound on 230m of 0.35mm mono the spool would be 87.5% full. Rough calculation (230/87.5 x 100) means 263m would be needed to fill the spool with .35 diameter. So how does the stated capacity of 340m/0.35mm make sense here?!
I think the last time I did this, I worked it out something like this:
Spool capacity = 340 x 0.35 = 119
I buy a 300m spool of 0.33mm, so 300 x 0.33 = 99 backing.
Capacity 119 less backing 99 leaves 20.
Braid I am using is 0.19mm diameter, so 20/0.19 = 105m of braid on each reel.
However, if I had used 230m x 0.4mm as the calculation for the spool capacity, that only comes to 92 (230 x 0.4).
As I say, I spooled some reels up earlier this year using a method similar to the above and it seemed to work out OK, but I just cannot get my head around it this time because of getting different values for spool capacity.
If a spool held 100m/0.4mm, you would expect the capacity with 0.2mm to be 200m, no?!
Someone please put me out of my misery!!
In reply to Post #1
Google it. There are some decent calculators online
Google it. There are some decent calculators online
In reply to Post #1
If a spool held 100m/0.4mm, you would expect the capacity with 0.2mm to be 200m, no?!
Nope, fraid not. Its not a linear scale.
You need to work out the volume of the spool, so nr2h or pi x radius, squared, then x the height or length.
You'll see a 100m length of .4mm is 12566mm3
A 100m length of .2mm is 3141mm3.
Calculator.net have a good calculator for volume.
If a spool held 100m/0.4mm, you would expect the capacity with 0.2mm to be 200m, no?!
Nope, fraid not. Its not a linear scale.
You need to work out the volume of the spool, so nr2h or pi x radius, squared, then x the height or length.
You'll see a 100m length of .4mm is 12566mm3
A 100m length of .2mm is 3141mm3.
Calculator.net have a good calculator for volume.
In reply to Post #3
Blimey my head just exploded
If you have a spare spool, I'd just put half the braid on then fill with backing line, once done transfer to the wanted spool, easy 
Blimey my head just exploded
If you have a spare spool, I'd just put half the braid on then fill with backing line, once done transfer to the wanted spool, easy
So trying a calculator, but doing it twice - once using 230/0.4 as stated capacity, again using 340/0.35 as stated capacity. Different results! 
In reply to Post #4
That's how I would do it lol
That's how I would do it lol
In reply to Post #4
How do I know what is half a 275m spool of braid though
How do I know what is half a 275m spool of braid though
In reply to Post #7
I'd buy another spool of braid lol
130 odd yards is just a good whack
I'd buy another spool of braid lol
130 odd yards is just a good whack
In reply to Post #8
It's for barbel fishing bud, I've bigger problems if I have 100m out
The reason I am asking is because i've previously trashed a spool of braid getting it wrong. Amazed it worked out OK last time
It's for barbel fishing bud, I've bigger problems if I have 100m out
The reason I am asking is because i've previously trashed a spool of braid getting it wrong. Amazed it worked out OK last time
In reply to Post #9
Find a big field
get someone to hold one end whilst you go and unroll it get the other give them the Other ends to hold So they have both ends and walk out to get the middle And cut it lol
Then roll them back onto the spool it 2
Simple innit lmao.
Find a big field
get someone to hold one end whilst you go and unroll it get the other give them the Other ends to hold So they have both ends and walk out to get the middle And cut it lol
Then roll them back onto the spool it 2
Simple innit lmao.
In reply to Post #10
I have a mate who does that
I have a mate who does that
In reply to Post #7
I count the handle turns as I know my reels load 108cm of line per full turn.
I count the handle turns as I know my reels load 108cm of line per full turn.
In reply to Post #12
That will vary though as the spool becomes filled with line
That will vary though as the spool becomes filled with line
In reply to Post #13
And how it fills the spool will vary with the diameter of the line, not an accurate method.
And how it fills the spool will vary with the diameter of the line, not an accurate method.
In reply to Post #1
Surely the easiest way is to wrap the amount of braid you want around some sticks, tie your mono onto the braid and continue to wrap until you're at the linear spool capacity.
Wind it onto the reel? Repeat.
Surely the easiest way is to wrap the amount of braid you want around some sticks, tie your mono onto the braid and continue to wrap until you're at the linear spool capacity.
Wind it onto the reel? Repeat.
In reply to Post #7
Have you not got any distance sticks or 2 bank sticks ?..garden canes would suffice .
Have you not got any distance sticks or 2 bank sticks ?..garden canes would suffice .
In reply to Post #15
I would do it that way too.
Count how many wraps of braid on the braid spool.
Wind half back onto the reel spool.
Fill reel spool to lip with mono.
Transfer filled reel spool to empty reel spool thus reversing it.
For the second spool...
Repeat as above (parts 1 ,2 and 3 ) then transfer onto another old reel and spool I keep just for such purposes
If you have no spare reel use an empty bulk line spool with a nut and bolt as an arbour in a drill to reverse the line.
Doing it by calculation leaves too many variables and would do my head in.
I would do it that way too.
Count how many wraps of braid on the braid spool.
Wind half back onto the reel spool.
Fill reel spool to lip with mono.
Transfer filled reel spool to empty reel spool thus reversing it.
For the second spool...
Repeat as above (parts 1 ,2 and 3 ) then transfer onto another old reel and spool I keep just for such purposes
If you have no spare reel use an empty bulk line spool with a nut and bolt as an arbour in a drill to reverse the line.
Doing it by calculation leaves too many variables and would do my head in.
Well by my detailed calculation (which as I have mentioned before kind of worked out on some other reels) I am looking at needing 300m 0.33mm mono as backing and then approximately 130m 0.19mm braid.
Do you know how long it would take me to wrap 430m round some distance sticks?!?!
I am still confused as to why Shimano state the spool capacity as 230m/0.4mm, 340m/0.35mm or 180m/0.45mm (the reels are Shimano BTR8000D EU by the way). Using the online calculator, 0.4mm to 0.35mm reckons 300m needed (not 340m), if I convert 0.45mm to 0.4mm it says 228m needed (spool states 230m so that is near enough). Have Shimano cocked up?
Do you know how long it would take me to wrap 430m round some distance sticks?!?!
I am still confused as to why Shimano state the spool capacity as 230m/0.4mm, 340m/0.35mm or 180m/0.45mm (the reels are Shimano BTR8000D EU by the way). Using the online calculator, 0.4mm to 0.35mm reckons 300m needed (not 340m), if I convert 0.45mm to 0.4mm it says 228m needed (spool states 230m so that is near enough). Have Shimano cocked up?
In reply to Post #18
I would want more than 130m of braid on after going to all that trouble.
I would want more than 130m of braid on after going to all that trouble.
In reply to Post #18
Do you know how long it would take me to wrap 430m round some distance sticks?!?!"
You only need to wrap the braid
Do you know how long it would take me to wrap 430m round some distance sticks?!?!"
You only need to wrap the braid
In reply to Post #19
As stated before, the reels are to be used for barbel fishing where I am rarely lobbing a feeder more than 20 to 30 yards. 135m (half a spool of braid) is plenty sufficient. I have a pair of Shimano 6000D's spooled up in the same way, with half a spool of braid on each plus backing and there is no problem at all. You have to remember a 275m spool of braid costs £30 and up, so filling the spool entirely with braid is not really viable. A 1500 yard spool is £120, nearly as much as the reels
As stated before, the reels are to be used for barbel fishing where I am rarely lobbing a feeder more than 20 to 30 yards. 135m (half a spool of braid) is plenty sufficient. I have a pair of Shimano 6000D's spooled up in the same way, with half a spool of braid on each plus backing and there is no problem at all. You have to remember a 275m spool of braid costs £30 and up, so filling the spool entirely with braid is not really viable. A 1500 yard spool is £120, nearly as much as the reels
take it to the shop who have a line counter and a machine, best few quid you'll ever spend.
or if i want to split a 300m spool in half i put it round distance sticks, count the wraps then wind half onto a reel. if its not enough i wind it back onto an empty spare spool and add more backing.
or if i want to split a 300m spool in half i put it round distance sticks, count the wraps then wind half onto a reel. if its not enough i wind it back onto an empty spare spool and add more backing.
In reply to Post #7
Look at the spool and take a good guess, I'm thinking it's not a 100m spool and you need every 50m on each reel.
Look at the spool and take a good guess, I'm thinking it's not a 100m spool and you need every 50m on each reel.
In reply to Post #23
275m spool, so about 135m on each reel, but because it is thin braid (0.19), it's a little harder to judge than a bulk spool of mono!
275m spool, so about 135m on each reel, but because it is thin braid (0.19), it's a little harder to judge than a bulk spool of mono!
In reply to Post #24
Count the turns on the handle after measuring the fist one, work out how many equals the total required.
Count the turns on the handle after measuring the fist one, work out how many equals the total required.
I had the day off school when we did maths so. I wrap the amount of line/braid I need then wind it on the reel followed by the backing. When full I either use a spare spool or use two old multiplyers to turn it round without twisting it then wind back on the original. Long winded but right every time
In reply to Post #26
It's not too difficult, just the ratio of diameters squared x Length
So say stated capacity is 180 metres of .45
and you need the length of .4
Ratio of diameters .45 divide by .4 =1.125
1.125x1.125 x180 =228
It's not too difficult, just the ratio of diameters squared x Length
So say stated capacity is 180 metres of .45
and you need the length of .4
Ratio of diameters .45 divide by .4 =1.125
1.125x1.125 x180 =228
In reply to Post #27
God this is just fishing not formula one, to me it's p1ss easy to achieve what you're after without all this exploding brain stuff
God this is just fishing not formula one, to me it's p1ss easy to achieve what you're after without all this exploding brain stuff
In reply to Post #28
You're not forced to participate!!
You're not forced to participate!!
In reply to Post #29
I'm only participating with the non brain taxin stuff lol
I'm only participating with the non brain taxin stuff lol
In reply to Post #30
In reply to Post #27
Oh I didn't realise it was that easy. Two old multiplyers for sale in classifieds.
Oh I didn't realise it was that easy. Two old multiplyers for sale in classifieds.
Had a crack at one of the reels last night. What a carry on
One of the 3 stated spool capacities is 340m of 0.35mm.
I'd bought 300m/0.33mm (12lb) sensor to use as backing. Wound the full spool on and the reel spool was FULL!
So had to manually remove some back off and guess. Before winding the braid on, I decided to google retrieve per handle turn and found 36 inches quoted on a shimano website. Possibly lost count but wound somewhere in the region of 125-130 turns, so that equates to 115m which is near enough what I wanted. However, the spool looks overfilled now
So I will wind the braid back onto a spare spool and strip a little more mono before transferring the braid back on.
Think next time I'll just bite the bullet and buy a bulk spool of braid and worry much less about this job!
One of the 3 stated spool capacities is 340m of 0.35mm.
I'd bought 300m/0.33mm (12lb) sensor to use as backing. Wound the full spool on and the reel spool was FULL!
So had to manually remove some back off and guess. Before winding the braid on, I decided to google retrieve per handle turn and found 36 inches quoted on a shimano website. Possibly lost count but wound somewhere in the region of 125-130 turns, so that equates to 115m which is near enough what I wanted. However, the spool looks overfilled now
So I will wind the braid back onto a spare spool and strip a little more mono before transferring the braid back on.
Think next time I'll just bite the bullet and buy a bulk spool of braid and worry much less about this job!
Ignore the stated spool capacity for starters, they are usually nonsense.
In reply to Post #33
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