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Nails vs. Carbide blade...

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Forum topic by MAKZ06 posted 06-26-2013 01:07 PM 783 views 0 times favorited 8 replies Add to Favorites Watch
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MAKZ06

37 posts in 528 days


06-26-2013 01:07 PM

I was running an old 3-1/4” maple workbench top through my table saw this past weekend to cleanup the edge. I managed to hit 4 nails with my brand new Woodworker II. Aaaaagh!!! I should have known better but wasn’t thinking. I got the top from a high school wood shop about 20 years ago…
The teeth all looked ok after the incident. I didn’t see any chips or missing carbide. Did I get lucky this time or what damage have I likely done?


8 replies so far

View FirehouseWoodworking's profile

FirehouseWoodworking

633 posts in 1997 days


#1 posted 06-26-2013 04:18 PM

I’d say you got lucky. A tooth flying off the blade can do a lot of damage! There is the possibility that the carbide may be “loose” but it would be virtually undetectable. It could be that the next time – or twenty times later – you use the blade, a tooth will come off. There’s no real telling.

Now imagine the damage you might have done had you run the wood through a surface planer!

I would recommend investing in a hand-held metal detector if you are going to do this sort of thing. If not, then you run the risk of damaging expensive blades and possibly getting a piece of metal or a piece of carbide imbedded in your body as you push the wood through the saw. Good luck!

Cheers!

-- Dave; Lansing, Kansas

View WhoMe's profile

WhoMe

1125 posts in 1967 days


#2 posted 06-26-2013 05:04 PM

Oooo bummer. Glad to hear no teeth were lost. I did that with a cheap blade on a circular saw and lost or damaged about 1/4 of the teeth. that one went in the trash as soon as it happened and a new blade went on.

Another thought. If it really concerns you enough, give Forrest a call and see what they say. It might be worth the peace of mind , and maybe safety, to have them check out the blade.
Even though Carbide is really hard, I would imagine that you have accelerated the dulling of the blade a little bit.

-- I'm not clumsy.. It's just the floor hates me, the tables and chairs are bullies and the wall gets in the way.. - Mike -

View vipond33's profile

vipond33

1405 posts in 1221 days


#3 posted 06-27-2013 02:36 AM

If the nails are solidly embedded there will be no damage to the blade. What do you think they cut steel with in metal shops? Carbide.
Carbide is hard and brittle. It is sintered particles. If the fastener vibrates even a little then the saw teeth will chip or break. They cannot stand sudden shocks but are perfectly happy to cut mild steel under controlled conditions. BTW, if the teeth are still on they will never come off unexpectedly. Brazing though copper to steel is quite secure even after an event such as this.

-- gene@toronto.ontario.canada : dovetail free since '53, critiques always welcome.

View lab7654's profile

lab7654

252 posts in 971 days


#4 posted 06-27-2013 04:12 AM

I would agree with vipond on this one as long as they were embedded. I’ve hit nails more times than I care to remember with my router, and the carbide wasn’t affected in the least.

-- Tristin King -- When in doubt, sand it.

View mtenterprises's profile

mtenterprises

832 posts in 1417 days


#5 posted 06-27-2013 10:38 AM

Ah nails are nothing. I once cut through a 1/2”- 3/8”drive socket that was left stuck in a hole on the edge of a door. Cut the socket right in half, didn’t do the blade much good though but I finished the cut.
MIKE

-- See pictures on Flickr - http://www.flickr.com/photos/44216106@N07/ And visit my Facebook page - facebook.com/MTEnterprises

View MAKZ06's profile

MAKZ06

37 posts in 528 days


#6 posted 06-27-2013 12:40 PM

Nails were definitely embedded tightly in the edge of the top so it sounds like I will be ok. I’ll check all the teeth carefully again. Thanks for all the responses and advice.

Right through a whole 1/2” socket?? Holy crap!

View mtenterprises's profile

mtenterprises

832 posts in 1417 days


#7 posted 06-27-2013 11:02 PM

Did I mention it made a god awful noise?
MIKE

-- See pictures on Flickr - http://www.flickr.com/photos/44216106@N07/ And visit my Facebook page - facebook.com/MTEnterprises

View gfadvm's profile

gfadvm

11372 posts in 1414 days


#8 posted 06-28-2013 12:37 AM

Gene, I have had the same experience cutting nails.

Mike, “it made a god awful noise” ROFLMAO!

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

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