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Damaged table saw blade after cutting into screw

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Forum topic by woodoogolem posted 10-01-2014 05:32 PM 1142 views 0 times favorited 11 replies Add to Favorites Watch
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woodoogolem

51 posts in 887 days


10-01-2014 05:32 PM

Topic tags/keywords: question tablesaw damage blade

I recently made a cut into a metal screw which damaged the blade severely. Afterwards it made a strange noise while cutting, a bit of a buzzing or growling sound. The bottom edges are really rough now, no clean cut at all.

Some of the teeth had small splinters on the outside. So I tried resharpening all the teeth and removing or filing the splinters with a diamond stone below the outer diameter of the teeth, Since this did not help much, I put a grinding stone to all 3 outer blade sides while rotating the blade backwards with my hand.

I can not feel any rough or protruding parts on any of the teeth but there is still this growling sound and the edges are still rough.

Any ideas how to get the blade back into good shape?


11 replies so far

View JAAune's profile

JAAune

1634 posts in 1776 days


#1 posted 10-01-2014 05:36 PM

Send it to a professional resharpening service. They’ll inspect it and tell you if the teeth need replacing or resharpening or if the whole thing is damaged beyond repair. If the blade is an inexpensive hardware store purchase then get a new one as the saw company will likely charge at least $25 to do anything plus the cost of shipping.

We use RKO Saw for our sharpening service.

-- See my work at http://remmertstudios.com and http://altaredesign.com

View jmartel's profile

jmartel

6564 posts in 1609 days


#2 posted 10-01-2014 05:40 PM

Replace the blade.

-- The quality of one's woodworking is directly related to the amount of flannel worn.

View bigblockyeti's profile

bigblockyeti

3663 posts in 1180 days


#3 posted 10-01-2014 05:57 PM

Definitely send it out, someone who sharpens and repairs blades can determine if the blade can be salvaged (& whether or not it would be worth it to). Using a blade that’s been damaged could be very dangerous if the brazing holding one or more of the teeth onto the plate has been compromised. The teeth on most table saws are going right around 120mph, and while they’re not very big, they are very dense and could case severe damage and injury if they came off at the right time.

View Fred Hargis's profile

Fred Hargis

3925 posts in 1952 days


#4 posted 10-01-2014 07:12 PM

To emphasize what’s been said already: either a pro, or replace. The first may suggest the second, but usually if it’s an expensive blade they can fix up fairly easily.

-- Our village hasn't lost it's idiot, he was elected to congress.

View Underdog's profile

Underdog

898 posts in 1495 days


#5 posted 10-01-2014 07:18 PM

Is that a High Speed Steel blade, or carbide tipped blade?
Even if you succeeded in removing the chipped places on the blade with your method, you will not have the correct clearance angles after that procedure.

Again, replace or professional resharpening.
Resharp costs around here are typically between $.35-.45 per tooth. If it’s a cheap blade with large number of teeth it’s definitely better to replace it.

-- "woodworker with an asterisk"

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woodoogolem

51 posts in 887 days


#6 posted 10-01-2014 07:56 PM

thanks everybody for their words of caution :-)

I have been thinking myself about the possibility of teeth partially coming loose. I just had some slight hope for some trick to find the maybe one offending tooth on a rather new (but not too expensive) blade.

I will go the safe route and already have ordered a new one as I don’t think professional repair will safe me a lot.

View exelectrician's profile

exelectrician

2327 posts in 1887 days


#7 posted 10-01-2014 08:12 PM

You totally un balanced the blade with your grinder, That is why you have the growling noise.

Replace the blade, it is toast.

-- Love thy neighbour as thyself

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knotscott

7207 posts in 2835 days


#8 posted 10-01-2014 08:12 PM

What blade is it?

-- Happiness is like wetting your pants...everyone can see it, but only you can feel the warmth....

View exelectrician's profile

exelectrician

2327 posts in 1887 days


#9 posted 10-01-2014 08:14 PM

.

-- Love thy neighbour as thyself

View Todd's profile

Todd

384 posts in 1136 days


#10 posted 10-02-2014 07:27 PM

I would be afraid of flying carbide. I would be inclined to replace it, or at least send it to a professional sharpener.

-- Todd, Huntsville, AL

View mudflap4869's profile

mudflap4869

1151 posts in 918 days


#11 posted 10-02-2014 07:39 PM

Bottom line. What is your safety worth. Several thousand rpm = carbide bullet.

-- Still trying to master kindling making

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