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I have a Craftsman 7 1/4 circular saw Model 315.10851 that I bought around 1980. It has been a reliable tool for numerous home projects over the years. I recently put a masonry blade in it to cut landscaping stones. It worked fine at first, then the blade started slipping. When I tried to tighten the bolt the blade the motor turns even when I hold the blade. I realize the problem is a result on not using the "blade washer" that has a flat spot which matches up with a flat spot on most blades. The masonry blade had only a circular opening so I didn't use it. The problem now is how do I get the masonry blade off of the saw?

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  • davemamer Jul 06, 2010

    No, there is no mechanism to stop the motor from rotating.

  • davemamer Jul 06, 2010

    Thanks for your thoughts, the problem is that the blade is too loose to use. It stops as soon as soon as it hits any resistance. Maybe it's time to buy a new saw.

  • davemamer Jul 06, 2010

    I took the end cap off earlier, but it didn't seem like there was much to get a hold of. I'll go give it another try. As you said, I can't use in now anyway. I'll sign on tomorrow and let you know if it worked.

  • davemamer Jul 12, 2010

    Thanks for all the tips, I finally found time to work on the saw again. Like you suggested I took off the end cap and fiddled to find a way to hold the armature without damaging it. I finally found a way to wedge my finger. It hurt for a bit, but I got the blade off and I didn't damage the saw.

    Thanks again.




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Is there no armature lock on this model?

Posted on Jul 06, 2010

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  • A Miller Jul 06, 2010

    I am sorry to hear this ... yours is definitely an uphill struggle. Maybe you should just keep this saw for concrete work. That is what I did in the same situation. So, now I have a couple of saws ... one definitely for concrete work.

    Thanks for your interest in and thanks for evaluating my response. I am sorry it was not of more help to you.

  • A Miller Jul 06, 2010

    You could remove the motor end cap and grab a-hold of the armature and maybe get the blade on or off that way ...

    Yes, you might damage the motor ... guess what, you cant use it now ...

    Might be time for a new one, you are right.

  • A Miller Jul 06, 2010

    Thanks ... at least get your blade back ...

  • A Miller Jul 12, 2010

    Glad you saved the finger ...

    Your post is dated tomorrow ... I guess you are on the other side of the date line from me on the East Coast of USA.



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