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New Diablo blade not cutting properly on old B&D miter saw

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Forum topic by ssbothwell posted 12-09-2009 09:34 AM 1360 views 0 times favorited 8 replies Add to Favorites Watch
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ssbothwell

13 posts in 2557 days


12-09-2009 09:34 AM

In an attempt to squeeze some more life out of it I bought a new blade for my black and decker miter saw. It takes an 8 1/4” blade. I bought a 8-8 1/4” 40 tooth diablo blade at home depot and just tested it out. For some reason the blade wont cut all the way through a 1” thick piece of scrap wood. When I held up the blade next to the original black and decker blade I noticed that it is slightly smaller in diameter. Any ideas as to whats going on here?


8 replies so far

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janna

1 post in 2556 days


#1 posted 12-09-2009 04:46 PM

I use this blade all the time on my arbor saw – it is a good blade we use it at 4500 rpm- check two things make sure the arbor is the correct size (I believe it is 1” on the blade – not sure what the tool calls for) (i.e. not slipping) and make sure the blade is facing the correct direction. Very dangerous to have an incorrectly installed blade. Old blade being slightly smaller in diameter should not make a difference on cutting ability assuming the blade is not making contact with the safety – but believe me you would know it if it was. If the blade is installed correctly then the next thing I would check would be the motor in which case it is time for a new machine.

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Dragonsrite

136 posts in 2862 days


#2 posted 12-09-2009 05:04 PM

If I’m understanding the problem correctly you’re using an 8” blade on a 8-1/4” saw. This would decrease the depth of cut by up to 1/8” which could be enough to leave a small portion uncut.

-- Dragonsrite, Minnesota

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ssbothwell

13 posts in 2557 days


#3 posted 12-09-2009 10:53 PM

Its a 5/8” arbor and the blade says it is for 8 – 8 1/4” blades.

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Julian

880 posts in 2991 days


#4 posted 12-09-2009 11:13 PM

The problem is the blade diameter. If you feel it’s not then try out the old blade and see if the problem goes away. If it does, then thats all the proof you need that it is indeed the problem.

-- Julian, Park Forest, IL

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dbhost

5607 posts in 2697 days


#5 posted 12-10-2009 12:01 AM

Miter saws are so cheap these days, pitch the old B&D and get a new 10” or 12” slider…

-- My workshop blog can be found at http://daves-workshop.blogspot.com

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ssbothwell

13 posts in 2557 days


#6 posted 12-10-2009 01:23 AM

I believe you guys that its the blade diameter. Do you think it would be a bad idea to put a 8 1/2” blade on the saw?

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Dragonsrite

136 posts in 2862 days


#7 posted 12-10-2009 04:01 AM

I’d stick with 8-1/4” since that’s apparently what the saw is made for.

-- Dragonsrite, Minnesota

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ssbothwell

13 posts in 2557 days


#8 posted 12-10-2009 09:30 PM

My B&D is really old and does not have any blade height adjustments. I returned the blade to home depot but they don’t have any other 8 1/4” blades. Most of the ones I see online are advertised as 8 – 8 1/4” which makes me think they will be slightly too small as well. Can anyone recommend a specific blade? Other than Forrest which is out of my price range.

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