wheel recommendations

Discussion in 'Magna-Matic' started by kawakx125, Jul 24, 2014.

  1. kawakx125

    kawakx125 LawnSite Bronze Member
    Posts: 1,124

    What wheel do you recommend for the mag 9000 sharpening only Oregon Fusion and Scag Marbain blades? Will the soft OEM one wear out on me very quickly sharpening these blades? I noticed that you state your grinders are made for a rockwell hardness of 20-40, and the Marbain blades run 48-52, unsure what the fusions run
     
  2. Magna-Matic

    Magna-Matic Sponsor
    Posts: 827

    Hello kawakx125,

    I would test out the 9000-35 or 9000-34 if you would like a harder wheel, which will be better suited to a harder blade.

    See more info here:
    http://www.magna-matic-direct.com/Norton-Grinding-Wheels-for-Magna-Matic-Sharpeners-s/2.htm

    The statement of 20-40 ROCKWELL is in regard that the majority of blades in the industry fall within that hardness range.

    I would be interested to know the source for your data on blades being 48-52 ROCKWELL. We have spot tested lawn mower blades from various manufacturers, and even cheap Wal-Mart blades, and the Rockwell hardness of blades varies greatly. We found some Fusion blades coming in softer than blades at Wal-Mart for push mowers.

    Keep in mind the harder the lawn mower blade, the greater the risk of cracking and chipping when foreign objects are hit with the blade.

    Thank you,
     
  3. twomancrew

    twomancrew LawnSite Senior Member
    Posts: 940

    Last edited: Jul 24, 2014
  4. Magna-Matic

    Magna-Matic Sponsor
    Posts: 827

    Hello twomancrew

    Thank you for the reference.

    For that hardness range, the 9000-34 would be suitable.

    Thank you,
     
  5. twomancrew

    twomancrew LawnSite Senior Member
    Posts: 940

    Your welcome. As much as I assume you folks know of hardness I can't see 50 RC being a good thing. I was recently told that when carbide inserts became popular in the 70s most tool makers were using carbide but didn't at all understand how it was cutting as fast for as long as it did without wearing. I'll let others in the industry try these blades out before I go and put them on my mower. I have a hard enough time keeping good spindle bearings as it is.
     
  6. kawakx125

    kawakx125 LawnSite Bronze Member
    Posts: 1,124

    The Marbain blades (OEM on any scag mower) are the best i've ever used. they are lighter and stay sharper much much longer than regular blades.
     
  7. twomancrew

    twomancrew LawnSite Senior Member
    Posts: 940

    Believe when I say I will be paying attention to them. How long has Scag been using them?
     
  8. kawakx125

    kawakx125 LawnSite Bronze Member
    Posts: 1,124

    I believe for quite some time, several years at a minimum, probably much longer than that.
     
  9. CQ_DX

    CQ_DX LawnSite Member
    from MA
    Posts: 67

    At least 14 years. Might be before that; 2000 is as far back as I can go with my records for Marbain on a SCAG.
     

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