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Magna-Matic Lawn Mower Blade Balancers, Sharpeners, and more

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  #11  
Old 02-08-2011, 11:50 PM
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grassman177 grassman177 is offline
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i got a pic and then when i looked at it, i figured out the part that hold on the wheel is sliding outwards and there was a set screw in it so i think it is a simple answer to my own question but thought i would post the picture anyhow, in case there is something i missed. i have not done anything yet to resolve the issue, but am confident this is the problem and no big deal.

this picture was of course before i took off the wheel to reveal the part mentioned above. you can see how the wheel is not centered and the small space behind it
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  #12  
Old 02-09-2011, 02:46 PM
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Hello Grassman,

Yes - the "arbor" (the part that the grinding wheel mounts on) has moved forward. The set-screw may have loosened and the arbor crept forward.

So you are correct - simply remove the grinding wheel, and loosen the set-screw - the arbor should be up againsed the bearing collar. Then tighten the set-screw (use loctite). Then you will be back ready to go.

Thank you for the picture - it just makes everything more clear.
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  #13  
Old 02-09-2011, 03:21 PM
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grassman177 grassman177 is offline
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yup, fixed it this morning. the set screw was loose. i will locktite it.
i also reversed the wheel as it was getting a bit more round on the operator side.
i did notice though that the arbor has a flat side to line up with the set screw. however, they are on opposite sides and i cant even begin to remove or turn it around 180degrees. any suggestions
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  #14  
Old 02-10-2011, 10:34 AM
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Hello Grassman,

You can use a pulley/bearing puller tool to remove the arbor from the shaft if it is hard. My guess is the set screw backed off enough, and it spun on the shaft a little - the set screw probably scratched the drive shaft and now this interference is making it hard for the arbor to come off.

You should get the the set screw to line up with the milled flat on the drive shaft.

Thank you,
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Gerd Ferdinand Bauer II

Magna-Matic Corporation
Waldo WI USA
800-328-1110 (toll free USA & Canda)
920-564-2366 (PHONE)
gbauer2@magna-matic.com
www.magna-matic.com
www.magna-matic-direct.com
www.youtube.com/magnamaticcorp
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  #15  
Old 02-10-2011, 10:40 AM
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Wow, didnt last long.
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  #16  
Old 02-10-2011, 10:56 AM
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Hello JP,

I'm unsure of what you mean. It does occur that loctite sometimes does not last. At the factory we apply a generous amount, but over many years we have seen a few cases where the loctite doesn't hold and a set screw will back off.

Thank you,
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Gerd Ferdinand Bauer II

Magna-Matic Corporation
Waldo WI USA
800-328-1110 (toll free USA & Canda)
920-564-2366 (PHONE)
gbauer2@magna-matic.com
www.magna-matic.com
www.magna-matic-direct.com
www.youtube.com/magnamaticcorp
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  #17  
Old 02-10-2011, 11:04 AM
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Was this not a new unit he set up?
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  #18  
Old 02-10-2011, 11:28 AM
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Hello,

I believe he purchased the unit in October 2010. I am not specifically aware of how many blades he has done since that time.

The unit has not failed, a set screw backed off, and if it caused any damage to the drive shaft Grassman is entitled to a new drive shaft because that is part of the warranty. My intent is not to be confrontational, but to say "something didn't last long," would imply that it failed and is no longer usable.

A loose set screw under warranty is far from failed and this is why warranties exist, to cover contingencies that can occur. The set screw could have become loose for a number of reasons: level of torque, condition of loctite, amount of loctite, shipping, improper use of the equipment, etc.

If you have a question of our level of quality or performance please read through the last TEN years of posts here at lawnsite.com within our forum and find unsatisfied customers.

Again, I want to be clear that I'm not trying to create a "flame" post - I was just trying to clarify a vague statement.

Thank you,
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Gerd Ferdinand Bauer II

Magna-Matic Corporation
Waldo WI USA
800-328-1110 (toll free USA & Canda)
920-564-2366 (PHONE)
gbauer2@magna-matic.com
www.magna-matic.com
www.magna-matic-direct.com
www.youtube.com/magnamaticcorp
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  #19  
Old 02-10-2011, 11:57 AM
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grassman177 grassman177 is offline
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i agree. i cant even begin to move the arbor,i had to tap in back into place with a hammer(no i did not beat it). it is on there very good, and maybe after geting warm it will be easier to remove. i will let you know.

i thought about that scratching making the shaft "damaged" and find it cool you mentioned that .

as far as blades sharpened, well, a ton! we have had to do new blades which take more time, but nothing compared to used blades that had the incorrect angle from the other grinder. those took quite some time and alot of metal to get a proper edge. theya re balanced and sharp as can be though now!

i do have access to a pulley puller and will see about getting the arbor free from the shaft, if not able to, what would be the next step?
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  #20  
Old 02-10-2011, 12:00 PM
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grassman177 grassman177 is offline
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oh and number of blades is about 60. but the wear on the wheel is more if you think about it due to the amoutn of grinding we have had to do. we still have more to sharpen yet as we dont have the final amount of blade stock.

i would say we have worn off about 1 inch of the wheel or more.
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