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    Looking for RAS advice

    I will be getting an older Delta RAS from a friend soon. I am looking for positive advice on how to use it best, care and feeding and best practices. Please don't bother telling me to use it as a boat anchor or stuff like that.

    Thanks

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    Re: Looking for RAS advice

    great for crosscutting, exceedingly dangerous to rip with. on the slide arm there is a locking knob, when using snug that knob until there is some resistance when pulling, REMEMBER RAS are CLIMB CUTTING! If not kept under full operator control the blade will try to climb OVER the board you are cutting.

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    Re: Looking for RAS advice

    Delta made a multitude of models and sizes over the years, some great, some just so-so. Each model type has its own quirks so its important to know which model so those with experience with those models can best reply with useful suggestions.

    The sweep-in adjustments of the components to the table surface will vary greatly.

    Also, by knowing which model, its likely we can direct you to sources of on-line manuals that you can download.

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    Re: Looking for RAS advice

    I am looking for positive advice on how to use it best

    If the saw uses a 10" blade, start looking now for a high quality Cross-cut blade with lots of carbide teeth. I have an old Craftsman that was very useful for a time but now that I have a sliding chop saw I don't use the RAS. Mine worked best with an 80 tooth blade for cross cuts. I never advise a person to rip with the RAS.

    Good Luck

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    Re: Looking for RAS advice

    I was not aware that it was a climb cut operation. Is it necessarily so? Can it not be used pushing the blade through instead of pulling it?

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    Re: Looking for RAS advice

    I have not lain hands on it yet. When i know the model, I will post it. And likely I should be able to find the manuals online. That will be my next task.

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    Re: Looking for RAS advice

    I have no need of ripping with it. But what tasks is it "best" at?

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    Re: Looking for RAS advice

    crosscut and with some careful layout, dedicated dadoes. If you use ruff cut lumber than great for blanking rough lengths before planing

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    Re: Looking for RAS advice

    Rule #1 (and maybe 1 through 10) The track of the arm must be parallel to the surface of the table if you're going to use the saw for anything other than a straight crosscut. For something like a dado, parallel comes into play. You don't want your dado starting out 1/4" deep at one edge and 5/16" deep at the other. Cutting tenons by worrying off the wood to a given point, same needs on parallel. There are many other fussy one-time adjustments needed for setting up a radial arm, but your manual will direct you on that.
    The lighter the saw, the more important the stand. It needs to be rigid and stable. Bolting to the floor is really good. I know one guy that got so frustrated with his lightweight 10" radial arm saw not keeping square that he discarded the stand and made a stand out of mortar and cinderblocks. After that, he never had a problem keeping things square again and actually used to brag about it. Of course, years later when time came to move his shop, he quickly admitted it was no easy task but well worth it.

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    Re: Looking for RAS advice

    Do not pull the blade to cut, push the blade into the cut.
    The kick back device only works in push mode.
    And then it wont climb.

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    Re: Looking for RAS advice

    I have an older 12" DeWalt RAS. Since I also have a 12" compound miter saw, I only use the RAS for crosscutting rough lumber too wide for the miter saw. The RAS is positioned near the beginning end of my work flow pattern, where I bring rough stock into the shop to acclimate.

    If you happen to have a sliding compound miter saw, then I would seriously think about declining your friends offer. Unless you just like the idea of having two tools that do the same job.
    I'll gladly tell you how I do something. Just please don't confuse that with the right way to do it, and almost certainly not the only way.


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    Re: Looking for RAS advice

    I only use mine for dado's these days. My Bosch Compound Miter Saw is my go to tool.

    "The American Republic will endure until politicians realize they can bribe the people with their own money!" Alex de Tocqueville"

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    Re: Looking for RAS advice

    Yes you can push to cut. Again be very careful. The ras was designed to climb cut. I she lain. Blade rotates toward you, by climb cutting the blade pushes material DOWN and against the fence, by pushing the blade will want to PICK UP the material and throw away from fence, hence why I said earlier tighten the slide lock so it helps hold the power head back

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  20. #14
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    Re: Looking for RAS advice

    If I am not pulling the blade through the cut, then why would it be a climb cut? Does the blade turn the opposite way than I expect?

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    Re: Looking for RAS advice

    I guess I haven't touched a running one in too many years to remember. Are you saying that the blade turns opposite that of a miter saw? Or that it is the same, but the cut should be started at the back near the fence and pulled through ?

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