When a blade manufacturer says don't use open flame

[Allsmokenopancake 0]

So, I have a black beauty BB9 blade I want to put into a shaft. Its a hollow hosel, and on the website, the instructions say "Do not use an open flame when inserting or removing blades as this will considerably weaken the blade and shaft"

Now, I know thats obvious enough, but is that disclaimer more for warranty purposes or will the blade get damaged.

I don't have a heat gun.

Also, a second question, I have a christian blade that I am having some real difficulty getting out of the shaft. I have tried heating it at the insertion point, but it's not loosening at all.

I don't have a vice or anything, so does anyone know a good way that I can get it out, do I just need to heat it more?

Sorry for the apparent dumbass questions

Cheers

[Chadd 916]

Most people tend to overheat their shaft when using a torch, hence the warning.

As for pulling the blade, stand on the blade and pull up on the shaft.

[DamnLocust 0]

open flame is also a less consistent heat source and i believe torches are hotter than most heat guns. I've been changing blades on my stove for years, (I have a heatgun at work, but I'm lazy) and it's possible to do so without any damage, but it's very easy to overheat the shaft or the blade tenon/hosel, especially when using a torch. If you have no other option, make sure that the blade/shaft is at least 4-6 inches away from the flame, and that you don't hold the heat source over any one spot for too long.

I'd try heating up the shaft a bit more (be sure to heat evenly across all 4 sides of the shaft and not keep it in any one spot too long) I've had blades stuck in shafts that it took me a good 5 minutes of heating to get out. A friend who can stand their ground is always helpful as well.

[MLSman 22]

The answer is both: it will void the warranty and could cause structural issues to the shaft and the blade.

It is true that a torch or any open flame provides an inconsistent heat source. The way to go is a heat gun. There are quite a few guns that can be bought for cheap ($20 or less), and is the safest way to replace blades.

[Hooah4 12]

Buy a Wagner heat gun @ WalMart. Only $20 at most stores. It will be a good investment. Don't take a chance w/a $40 blade.

[Medic 0]

I've always just held the blade/shaft above a stove element. Works like a charm.

[jjtt99 0]

As mentioned, heat guns are cheap and are available at any hardware store. The heat gun doesn't have to be a deluxe model either. I think I spent $30 on mine and it works fine.

I wave my heat gun over the bottom part of the shaft about ten times, then, turn it one quarter, repeat, repeat, repeat. After I circle the shaft a few times the blade slides out fairly easily.

If you're fast, the new blade will go straight in. If not, heat the glue on the new blade a bit, then give a couple more passes of the heat gun on the shaft.

Obviously you don't want to overheat the shaft. Better to go slow. If the blade is not going in or out, more heat required. If it practically falls out, you used too much heat.