Coil winding info/tips for size....
... most of those here probably already know the following but it can't hurt to repeat it for those new to it that may drop by.
I don't think it's rocket science stuff on which size coil you use so exact sizes don't matter... But having a chart to see their equivalent sizes may be handy. This way, you can select from your available rods, drill bits or similar things to wrap with.
It appears to me, in the few threads I visit.... that the two most common size's of coils used are around the 1.5mm and 2mm sizes. In imperial sizing... the closest equivalants are 1/16" and 5/64... I'll add another just to go up one size that I suspect some others may use and is almost 2.5mm... 3/32".
A quick conversion table with fractional, decimal ( inch ) and finally metric
1/6" = .0625" = 1.5875mm
5/64" = .078125" = 1.984375mm
3/32" = .09375" = 2.38125mm
On further thought... many of us also use blunt tip needles to wrap with... in fact, I prefer them over a drill bit or just a rod. So here is a chart for some of the common sizes... guage to metric mm
14g = 1.6277mm
12g = 2.0525mm
10g = 2.5882mm
There are several coil wrapping jigs available now... some are imperial, some metric... so those should help with any coil calculator you choose to use so you can estimate your final resistances. This is currently my favorite online coil calculator
Coil Toy - Online calculator for e-cigarette resistance coil building
I've also recently picked up a new coil mandrel ( jig ) that is simple and contains several sizes ( 5 sizes from 1.5mm up to 3.5mm ) all in one piece. Another nice feature, it's cheap at just under $3 USD .... I've also seen it listed at a US reseller but can't find where I saw it... so this is a FastTech link which is where I found it first. Total length is about 4" or 10cm long and it fits nicely in the hand. Each step down also makes a nice place to start your coil against.
https://www.fasttech.com/p/1926001
