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Router bit longevity???

Discussion in 'CNC Routers & Engravers' started by Rick Tennyson, Nov 13, 2019.

  1. Andy D

    Andy D Very Active Member

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    Yeah, all the stuff I routed was mill finish. We got a batch in that cut like sh*t, come to find out they bought from a different vendor that
    sold inferior sheets... You're right, not sure how you would know once they're painted, unless you get the spec sheet... but I couldn't tell you what the numbers should be :)
     
  2. Raum Divarco

    Raum Divarco Field Engineer/Application Specialist CWT AMCAD

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    Those DLC coatings are nice
     
  3. JBurton

    JBurton Signtologist

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    What speed is your router moving and rpm is your bit turning.
    Also, not sure what you're doing with the aluminum, but I've moved almost all flat panel signs to dibond instead of 040, not really because it looks better (though the depth in my opinion does look better), but because the dibond is so much easier to cut. Nearly silent. Plus no need to use lubricant.
    Also, have you tried straight alcohol instead of silicone spray? It does wonders, just can't have a smoking cnc operator...
     
  4. Raum Divarco

    Raum Divarco Field Engineer/Application Specialist CWT AMCAD

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    last year there were some arguments with distributors over materials. some pointed out to say the tariffs have influenced what actual alloy type was being sold due to price. One of the main giveaways was when we started to have to use coated bits and misting some to prevent immediate melting/fusing of the chips to the bit.
     
  5. JBurton

    JBurton Signtologist

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    So are these inferior sheets authentically different alloys, 3003 vs 5052, or are they 3003 with extra crud in them?
     
  6. greysquirrel

    greysquirrel Member

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    slow your speed down to increase lifespan...also use 1 bit for aluminum only, 1 for Plexiglas, 1 for wood etc...
     
  7. ikarasu

    ikarasu Very Active Member

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    I thought slowing your bit down too much can actually kill its lifespan? Theres a certain sweet spot - Too slow and its not moving enough to cooldown... too fast and the friction will cause it to over heat.

    Every manufacturer has a RPM/feed rate setting for that bit... I don't do too much CNC work as I'm just a backup... I can "Get by" using all our saved settings, But I do all our purchasing - I bought 10 bits about a year ago and havent needed more - And we've gone through 4-5 skids on material, so roughly 300 sheets. Which means we get at least 30 sheets per bit on .081 sign grade aluminum. Sounds a bit high to me... but some stuff can be 4x4/4x8 sheets, so its not doing too much cutting.

    Our onsrud book has feed and speed rates for every bit. It's a great starting point.
     
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