How hot do drags really get?

[locknut]

Gidday from New Zealand. I am rebuilding the drags in a couple of Duel 6/0 reels. I have had new CF Rings Laser cut and now I need to glue the Carbon fibre (Big thanks to Dawn) to them. I have beefed up the number of springs under the drag stacks to increase the amount of drag as I will be loading the reels with 37Kg braid for Broadbill. With 30Kg of drag at sunset how hot will the drags get during a long run? You here all sorts of stories of reels overheating and drags failing but does anyone actually know. The reason I ask is I am unsure what glue to use. I note that epoxy can soften depending on type from 90-130 C and some super glues will go to 150 C. Am I over thinking this and just use the first glue that comes to hand. Your experiences would be great

[Dynamo]

Drags can get pretty hot during a long run, nor enough to burn a scar into your arm. That's mostly with star drags, however. The duel is a high-end reel w. large drag plates, so I'd imagine it wouldn't get too hot. If you're concerned, then Cal's grease on the washers should absorb most of the heat. Cheers 

[Robert Janssen]

I have tested and measured many to excess of 200*C.

Regular epoxies and superglues are not adequate.*

Clue: HT-100 stands for High Temperature.



*oh i too have seen internet suggestions of using whatever this-or-that glue. Let that be their concern, not yours.

[locknut]

Thanks, what would be your suggestion Robert

[Shark Hunter]

That's a tough one locknut.
I only fish senators, so there is no glue, just HT-100's, washers and Cal's Grease. I can't think of a tougher glue than epoxy.

[Bunnlevel Sharker]

I got lit up on my 4/0w this summer from the star on a ray. LD should be fine

[Robert Janssen]

Ok...What is going on here... these are the same reels you posted about a couple of years ago, right? And what material are you bonding to what- carbontex to stainless substrate? Or laminated type one-sided fiberglass sheet to winged discs you cut from.... what? Or two one-sided fiberglass sheets back-to-back?

About temperature and strength and is-it-good-enough-to-get-by thinking, part of the thing is, that these are not your reels. For all you know, they might hook up to a world-record blue marlin next week. So, see to it that they are the best they can be.

Bonding agents for hi-temperature applications are hard to find, especially outside of the industrial sector. I've spent a LOT of time searching for them and talking with industry experts at 3M Aerospace and similar about hi-temp bonding applications, but it quickly gets out of hand.. (like, i don't own Lockheed, ok? I just want to make drag washers..)

Regular epoxies (Araldite and similar) are seldom good to more than 100*C or so. Loctite has some stuff that holds to higher temperatures initially, but there is a drastic drop as soon as temperatures get higher.


Here are a couple of discs i made for an Everol a whle back, by laminating first the carbon cloth to a substrate to make the actual friction material, and then bonding that to stainless discs.



This is a drag testing apparatus i used to run tests of many materials under similar circumstances, while keeping tabs on temperature, RPM, time, etc.




PS: I've noticed that the picture above has been borrowed and reposted somewhere a number of times without my knowledge. Curiosity is driving me crazy. If somebody has seen it before, please tell me where!

.

[locknut]

That's some rig Robert, thanks for your thoughts, I am bonding the Carbontex to 304 Stainless plate as the Duel drags are a multi disk stacked drag.

Thanks Jeremy

[Alto Mare]

 Doc, I haven't seen these pictures before, but can't blame anyone for downloading them.
Put up some videos of you in action, I would pay to see them and I'm sure so would anyone else.....just beautiful work!
Sal

[Robert Janssen]

Doc, I haven't seen these pictures before, but can't blame anyone for downloading them.

No, i don't mind. Just curious. It is kind of a specialized subject after all. (Photobucket used to have a little chart function showing how many views each pic had. This one used to get sudden spikes through the roof; i cant figure out where from. This one, and one of a disassembled hydraulic jack is overwhelmingly popular (?!) )

Jeremy, okay- Carbontex is of an open weave construction. One needs to be careful to not allow the adhesive to bleed through the fabric. Use sparingly.

.