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Nails vs. Carbide blade...

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Forum topic by MAKZ06 posted 302 days ago 640 views 0 times favorited 8 replies Add to Favorites Watch
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MAKZ06

34 posts in 311 days


302 days ago

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

620 posts in 1780 days


#1 posted 302 days ago

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

1016 posts in 1750 days


#2 posted 302 days ago

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 1004 days


#3 posted 302 days ago

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

233 posts in 754 days


#4 posted 302 days ago

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

784 posts in 1200 days


#5 posted 301 days ago

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

34 posts in 311 days


#6 posted 301 days ago

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

784 posts in 1200 days


#7 posted 301 days ago

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

9595 posts in 1197 days


#8 posted 301 days ago

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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