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RAS kickback on crosscut?

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Forum topic by danielmatt posted 22 days ago 181 views 0 times favorited 6 replies Add to Favorites Watch
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danielmatt

4 posts in 23 days


22 days ago

Hey all, was hoping someone might be able to help me with my RAS. It is an old DeWalt 740 that I was given. However, it has started kicking back on me during cross cuts, throwing the wood into the bell housing and throwing the saw back at me. I’m about to throw it in the trash :p But I thought maybe you guys had some ideas as to why could be happening. I have an idea or two, but curious as to what you all think.

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DaveR

1517 posts in 614 days


22 days ago

Dull blade? It is installed correctly isn’t it? You do need to make sure you have control over the motor since it will naturally want to walk forward on you. A dull blade would exaggerate that.

-- Until you spread your wings, you'll have no idea how far you can walk.

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skeezics

198 posts in 612 days


22 days ago

what blade? a negative hook blade is what I would be using on th RAS. less kick back and a better cut.

-- hey honey! watch this!

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Todd A. Clippinger

5638 posts in 993 days


22 days ago

I had a RAS for a while and I installed a negative hook blade to help control it. A little bit of a positive hook on the teeth can make for a fairly aggressive RAS.

-- Todd A. Clippinger, Montana, http://amcraftsman.com

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a1Jim

16695 posts in 470 days


22 days ago

Two things come to mind. Mostly kicks occur when your wood is not squarely up against the fence and when you cut the wood it tries to pull itself straight and slams the wood. The other problems with RAS are the slider
not being locked down so that the head rocks side to side or worn out bearings causing the same problem. plus the two areas Dave and Skeezics brought up.

-- Jim from Heirloom Woodshop Southern Oregon

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danielmatt

4 posts in 23 days


22 days ago

tHanks for the replies! Blade is a dewalt cross cut 60 teeth if Im remembering correctly. My theory was the fen e or j square wood as was suggested. Guess i misjudged the actual importance of those factors. Pretty foolish in
hindsight. Wanted to just make quick roughcuts before squaring wood and such; easier to joint with handplanes than ten footers :)

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PG_Zac

151 posts in 282 days


21 days ago

Daniel,
I have a Dewalt 1251 which has a spring loaded cable between the rear post and the moving head. I had some issues similar to what you describe, and I largely corrected them by adjusting the spring to pull back harder. With the sprung cable partially preventing the saw from coming towards you, the less chance there is of a runaway.

Good luck, and let us know what your solution is.

-- I may be schizophrenic, but at least I have each other.

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