I've read some post telling that blanks do not know what are they going to be used for. So you could theorically use any blank for any application if specifications match what you're looking for.

But producers sometimes include a blank for a specific application. And provided specifications are not always the same, depending on "intended future use" of the blank.

In the catalog I have, Lamiglas Triflex blank CGBT-84-1M only shows line rating (30 lb) but not lure weight. If I want to use it for heavy spinning (or casting), is there any way to know the approximate lure weight it can handle?.

On the other hand, I know these figures (line rating and lure weight) are just approximate but, will line rating or lure weight of the finished rod change from these values?. I mean, are these values related to the blank or to an "assumed" future rod?.


Daniel

Like you say, it's approximate, and it's driven also by factors not specifically or related to the blank itself. One thing to consider: if you build a given blank as a spinning rod, you will genrally use lighter lines than if you build the same blank as a casting rod, because casting reels are more suited for heavier lines. But the lure weights for that blank will remain roughly the same when built for either reel.

Daniel,

Tom gives a very good explanation to which I want to add my thoughts on this subject. Experience also comes into play. I choose my blanks with the lure weight in mind. If I am going to wade fish the flats and throwing 1/4 oz. spoons, then I want a blank rated anywhere from 8 up to 12 lb. line. I subtract the 8 from the 12 and divide the difference by 2 and add it to the 8 giving me a median range of 10 lbs. I am pretty sure that that blank will work fine using the 10 line and 1/4 oz. spoon.

On a rod rated for 30 lb. line, using a 30 lb. shock leader. I can cast 4 ozs. of lead plus bait using 20 lb. as my runining line. Most rod builders that have been at it for a while can make those judgements and so will you.

Cheers, Ellis

A blank that is rated only by line weight is generally not intended for casting lures or bait. Offshore trolling rods, for example. Those that are intended for casting purposes, usually do carry a lure weight rating.

This doesn't mean that you can't use such a blank for casting, but it might be your best choice, either.

The ratings given for blanks should not change for the finished rod, unless you do something that is widely outside of the norm. The addition of guides and wraps and finish will always slightly soften the blank and technically reduce it's lure weight range rating. But unless we're talking about extremely large and heavy guides, far outside of what the manufacturer would expect you to use, the finished rod should function well with the specs given in blank form.


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Perhaps, if you find a blank that does not have a lure weight, try to find a similar blank with a lure weight, then compare