All,
I’m using a #80 scraper for pretty much the first time. I got a really great hook on it after a few tries. The thing works great!
When I took the blade out after quite a while of scraping my benchtop, I noticed a round black mark, which appears to be a burn mark.
Does anyone know, is this indeed a burn? If so, why would it be there, opposite the pressure screw, and not at the edge of the blade where the metal is so much thinner?
Jonnie Boy
Replies
looks like a heat mark from friction,like case hardening metal.
Like it was there all along? I thought of that, but if so, I honed the blade and put a hook on it without noticing it.
Or did you mean from the friction of scraping? Is it common for that to happen?
My brother had a thought that perhaps it was oil on the blade that heated and burned.
I think its from the friction of scraping. have you ever used a hand held scraper?, they can get hot enough to burn your finger tips.
Man you got some tough, heat resistant, fingers! :>)
I use my scrapers all the time and have never seen anything like that!
And then.. I re-read your post. I think you have a wood or metal holder for the blade!
I'd hate to get in a bar fight with you... You NEVER give up!
I'd hate to get in a bar fight with you... You NEVER give up!
Never bring a cabinet scraper to a bar fight.
I'm trying to picture holding off an angry mob with a cabinet scraper. I don't think they'd be too good at crowd control.
LOL!!
I don't know man but I'd hate to see one flying in my direction, dull or not!
:-)
Regards,Bob @ Kidderville Acres
A Woodworkers mind should be the sharpest tool in the shop!
Bob.. I sure hope you and the little lady are doing well!
Hi Will,
Thanks for asking.
It's been a WET summer; haven't seen two sunny days all summer long. The temp went above 80ยฐ twice so far! Fish have been jumping outa the stream cuz there's so much rain.
In spite of it all I've managed to paint the whole house; don't know how I did it. Building a pergola right now, between showers I might get 4 hours in a day to work on it.
Mary's become a pyromaniac with the fireplace/pit. She's figured out how to get the fire going so the rain doesn't put it out! Gotta be careful putting up the rafters or me keista will get burnt.
:-)
Regards,Bob @ Kidderville Acres
A Woodworkers mind should be the sharpest tool in the shop!
Bob,"Building a pergola right now"
Plans or winging it? What material"thanks,Boil
Relax Bob - at the worst, you'd suffer a serious scrape.Edit: Yeah, I'm scraping the bottom of the barrel with that one!Chris @ http://www.flairwoodworks.com
and http://www.flairwoodwork.spaces.live.com) - Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful. - Albert Schweitzer
Edited 8/9/2009 12:38 pm by flairwoodworks
I doubt you've done any damage to the blade. Scrapers are tempered to around RC 50. RC 50 tempering of normal tool steel will require heating it to about 800ยบ The color resulting from such heating is black to gray.
Scraper edges don't last long and I suggest you sharpen that thing more often. You probably did more damage to the surface of your wood than to the scraper.
"You probably did more damage to the surface of your wood than to the scraper."
I won't worry about the blade, then.
That's a good point about re-sharpening more often. Why try to smooth a surface with a dull, tearing blade.
If you are scraping oak, and that is what appears to be the case from the photos, I suspect that you are seeing a discoloration of the steel from the tannic acid in the wood.
John White
Shop Manager for FWW Magazine, 1998-2007
John,
The surface being scraped is oak, and the discoloration is on the side closest to the surface being planed, so you could very well be right.
Is it from the shavings rubbing against a particularly hot spot on the blade?
Mysterious, but harmless, I take it.
Thanks!
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