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  1. #1
    Gold Member Boeing's Avatar
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    Sep 2010
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    451
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    Botetourt, Va
    Tractor
    kubota L3010

    Default angle grinder vs. disk angle sander????

    Guys, help me out here. I have a 5 1/2" (I think) disk angle sander. I want to sharpen the blades on my bush hog. Can a grinding disk be put on this sander?
    Most of the grinders look like 4 1/2"....some are disturbingly cheap....JUNK?
    I hate having tools upon tools to store so when I can make ONE tool do several things I LOVE IT. Thanks

  2. #2
    Veteran Member
    Join Date
    Feb 2007
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    1,125
    Location
    easten Colorado
    Tractor
    JD 4020

    Default Re: angle grinder vs. disk angle sander????

    most sanders are slower RPM, so they do not burn as easely or if used as a polisher they do not cook the paint, when buffing,

    If the spindle is such that it will accept a grinder wheel one can put it on it, it may not may not grind to ones liking, some times if a grinding wheel is ran slower than it is more or less designed for it will wear faster than normal,

    and as far as size goes, there are 4" 4 1/2" 5" 6" 7" and 9" that I have seen or am aware of,

  3. #3
    Elite Member SPIKER's Avatar
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    Jun 2002
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    4,346
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    Ohio, Jeromesville, Ashland County
    Tractor
    Jinma 284

    Default Re: angle grinder vs. disk angle sander????

    heck the junk 20 buck HF grinders are perfect for this job, mine is 10+ yrs old still going. the "Drill Master" line is total wast of $ as a few bucks more the Chicago brand seems good for light industrial farm use...

    Mark
    I may remember why I went to the other end of the shop, I'm just afraid once I get there I'll forget how to get back!

  4. #4
    Super Member Gary Fowler's Avatar
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    7,830
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    Bismarck Arkansas
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    2009 Kubota RTV 900, 2009 Kubota B26 TLB & 2010 model LS P7010

    Default Re: angle grinder vs. disk angle sander????

    Quote Originally Posted by SPIKER View Post
    heck the junk 20 buck HF grinders are perfect for this job, mine is 10+ yrs old still going. the "Drill Master" line is total wast of $ as a few bucks more the Chicago brand seems good for light industrial farm use...

    Mark
    Good advice, go for the $20 rather than $10 and get the 4.5 rather than the 4". That extra 1/2" on the outside diameter lasts much longer. Also I like the paddle switch model better than the slide switch as it is much easier to use
    2010 LS P-7010C 20F/20R gear tractor & FEL, 2009 Kubota B 26 TLB, RTV 900 Kubota,17 foot Lund boat with 70HP motor, 2012-20 ft 12k GVW trailer, 2011- 52" Craftsman ZTR mower, 2013 Ferris Zero Turn, 3 weed whackers, pressure washer, leaf blowers, 7 foot bush hog, 8 foot landscape rake , 8 foot 3 PH disc, 2 row cultivator, 350 amp Miller AC/DC welding machine and all the tools needed to keep them all repaired and running.

  5. #5
    Elite Member
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    Ohio
    Tractor
    GC2310,

    Default Re: angle grinder vs. disk angle sander????

    You can sharpen blades with a disc grinder, but it can be dangerous.

    The edge of the blade can get caught on the disc, and when it is traveling at high speed you can find yourself under attack.

    The better, somewhat safer way to sharpen them, is to use a grinder with a "stone" wheel on it.

  6. #6
    Gold Member Boeing's Avatar
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    451
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    Botetourt, Va
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    kubota L3010

    Default Re: angle grinder vs. disk angle sander????

    Thanks Guys,
    I live fairly near to a HF and they have specials all the time. I'll look for a "chicago" model with a paddle switch.
    Ray, Can I get a "stone wheel" for the tool that we're describing? Then do you grind on the edge like a bench grinder or on the side?
    I had a pneumatic cut off wheel come apart once and it really "punctured" me.....ouch.

  7. #7
    Elite Member
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    Oct 2006
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    Ohio
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    GC2310,

    Default Re: angle grinder vs. disk angle sander????

    Yes, electric angle grinders are generally used with a grinding wheel. One is illustrated below. This is opposed to a cut off wheel, which can also be used. As you have seen those can be dangerous.

    A HF model, (and yes, the paddle switch is much safer), would be fine for light duty grinding, like sharpening.

    For additional safety, I suggest you buy a brand name grinding wheel, 1/4 inch or thicker, and dispose of the Chinese freebee the tool comes with. Make sure you buy a metal grinding wheel, and not a masonry one.

    Remember to always work in a position so that the wheel is rotating away from the edge of the blade your are sharpening, rather than towards it.

    And, remember to wear a dust mask, and eye or face protection. The material these wheels are made from becomes a dust during use that you do NOT want to breathe.

    -dewalt-dw4418-jpg

  8. #8
    Bronze Member
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    TYM T451,bolens G214.John Deere 440CID,Shaver sc25 stunpbuster,woods750 backhoe,wallenstien splitter,woods bb60 mower,woods 60"tiller,countryline tiller,99 international 4700 car carrier

    Default Re: angle grinder vs. disk angle sander????

    I also agree with ray66 you should never sharpen a blade with a sander grinding disk as they are called.The dewalt wheel he shows is a very good wheel.I use Sata wheels myself.Like the man said definatly throw the china made cheapie the tool comes with in the trash(poorly madeand dangerous)

  9. #9
    Silver Member
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    Dec 2010
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    185
    Location
    Love, VA
    Tractor
    Kubota B7100 HST 4WD

    Default Re: angle grinder vs. disk angle sander????

    I use a flap disc, which is usually what's on my grinder. It sharpens a blade well, and doesn't dig in like a rigid disc will do.
    "For I am not ashamed of the gospel of Christ..." Romans 1:16
    Kubota B7100 HST 4WD
    94 Dodge Ram 2500 CTD

  10. #10
    Platinum Member BIG DOOLEY's Avatar
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    Aug 2012
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    MICHIGAN
    Tractor
    JOHN DEERE 2320

    Default Re: angle grinder vs. disk angle sander????

    Quote Originally Posted by hodge View Post
    I use a flap disc, which is usually what's on my grinder. It sharpens a blade well, and doesn't dig in like a rigid disc will do.
    I use type 29 discs all the time in the shop.
    I keep 36 grit, 60 grit and 80 grit on hand.
    found them very nice for sharpening mower blades.
    the more you use a grinder for deburring, shaping, beveling... it is easier to keep a nice straight edge on blades.
    I use a grind almost daily for work
    If you only get an angle grinder out once in a blue moon then you may not get the results you like.
    an electric or air powered bandfile is a nice tool also.
    I have a Milwaukee bandfile with a variable speed controller. Its like hand file but much faster.
    2012 JD 2320, HOMEMADE CANOPY, 54" FRONT BLADE, 54" MID DECK MOWER, HYDRAULIC ANGLE 60" REAR BLADE, QUICK HITCH, STAINLESS FRONT MOUNT SPRAY TANK W/BOOM, 200CX LOADER W/ 61" BUCKET, HOMEMADE BALLAST BOX,HOMEMADE BUCKET GRAPPLE
    1998 "BIG DOOLEY" Chevy K3500 Crew Cab (36.000 miles & counting)

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