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When do grinding discs wear out?

Discussion in 'The Garage' started by Pookster, Apr 19, 2007.

  1. Pookster

    Pookster 1/2 ton status

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    Im having a tough time figuring out when to replace grinding discs. Cutting wheels are easy, when they become a 1" nub, replace it. :haha:

    When do you replace grinding discs? I've been using the same one for 4 months... its gotten a bit slower to grind, but still grinds away... Is this supposed to become a nub too?
     
  2. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

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    When it no longer "grinds". I have been using the same grinding disc on my angle grinder for about 8 years now. I got some awesome disc's from a friend that came from his work at an Auto manufacturing plant (NUMMI). :D
     
  3. noahrob

    noahrob 1/2 ton status Author

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    I'm with Scott, I go until it don't go no mo...
     
  4. mechted

    mechted 1 ton status Premium Member

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    As with all things, I think the best approach is to look at the consequence of failure: if the disk were to shatter while rotating at high speed, pieces of disk could go in all directions, and really cause some damage. Given that, and the cost of a new disk, I only run them down to about 60 or 70% before replacing. I may be needlessly burning money in the name of safety, but Im willing to pay it.
     
  5. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Unless you've dropped the grinder and fractured the disc it actually gets less likely to 'fly apart' as it wears down (less disc diameter, same grinder rpm = less speed at the cutting edge of the disc.)

    Rene
     
  6. Pookster

    Pookster 1/2 ton status

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    ahh, so it DOES wear down. I was under this weird assumption that they dont actually wear away, but rather "dulls". I must just not be grinding enough.

    Any hints on how to clean up the metal spparks that fly everywhere?
     
  7. goldwing2000

    goldwing2000 Guest

    Vacuum cleaner or a magnet.
     

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