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Mitre saw & using a length stop

912 Views 8 Replies 8 Participants Last post by  yamato72
First up I do not have photos and hopefully after an explanation don't need them.

Bosch Compound Mitre saw with a glide arm feature.

A friend has asked me why when he uses a clamped stop (to obtain consistent length) and the glide arm the saw tends to kick and throw the cut piece (on the RHS of the blade) upwards.
I visited to watch what was happening and suggested he stop and use a band saw but I'm curious from a safety perspective how to prevent this occurring?

In addition to clamping the length stop should he be clapping the intended piece to be cut off? I think in retrospect it's what I'd do but as he has a lot less experience I think I opted for safety first.

Any tips and or advise from long time Mitre saw folk is welcome please…..

Thanks, Kerry
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What sawblade is used? A negative of positive. (Photo SW). For professional use in Europe a negative rake angle is obligated (only on a mitre saw). If you are not a professional you may do it the way you like.

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Its got nothing to do with the blade type. That said, a blade that has a lot of run out its more an issue, but the bottom line is any time the cutoff is between a stop and the blade, this can happen.

Solutions: yes, either hold down the cut off, or keep the saw plunged and wait for the blade to stop. Personally, I do the latter, as I can't stand fiddling with clamps.
I set up stops with a block and a clamp on RHS, hold down piece cut to length and operate saw w/left hand. I've never had problem like that. Is he pressing the board against the stop or just letting it touch gently?
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I think we are all assuming perfectly milled lumber… a cup here (and not of vino), a bow there (even from a self acclaimed Robin Hood)... will undoubtedly create unpredictable results…

Not being technical, I won't enter a pissing contest about blade type (though thanks for the info Dutchman) and answer as a hacker with all his fingers… so far.

Assuming yazall not going to rush to your garden shed and grab that rake... and I don't think "NOT getting it" is what Dutchy refers to as a negative rake.

If the piece is big enough clamp it… all saws come with a clamp and if you weren't stupid enough to toss yours out when you added the ZCI… use a narrow 6mm, or maybe even a 3mm, ZCI…no need for that beefy one, and still permit the clamp clearance/swing.
If your one of those 98% stupid "tossers", at least hold by hand… or use a million dollar stick,
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if it's small… and if you're not prepared to spend a million dollars, a door stopper on a dowel may keep fingers far enough away,
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or "school erasers" on a dowel for hold down,
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Take note of the multiple choice for ends!

Alternatively, just be patient and wait for the blade to stop… or at least slow down to minimise damage.

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If you are cutting small pieces, when you raise the blade it will catch everything, throwing the cut piece somewhere in the shop. I always let the blade come to a stop before raising it. No flying pieces.
If you are cutting small pieces, when you raise the blade it will catch everything, throwing the cut piece somewhere in the shop. I always let the blade come to a stop before raising it. No flying pieces.

- Eric
This.
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