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Thread: Favorite Grinding Disc For 4 1/2 Angle Grinders ?

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    Favorite Grinding Disc For 4 1/2 Angle Grinders ?

    Hi everyone,
    Need some advice as to what type of grinding disc for removing a messy weld. I have a Metabo 4 1/2 angle grinder , which is 11 amps and 11.000 rpm.
    I usually run 5/32 7018 on 1/2 a36 steel plate. I have seen 1/8 thick wheels that can grind on the edge and appear to work very well. I just have not tried them yet. I think they were Pferd and made in Germany.
    Thanks in advance,
    J

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    Re: Favorite Grinding Disc For 4 1/2 Angle Grinders ?

    I only own Dewalt 120 volt.

    Dave

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    Re: Favorite Grinding Disc For 4 1/2 Angle Grinders ?

    3M cubitron 2.

    https://www.3m.com/3M/en_US/p/d/b40065261/

    if you want the best, that is it, the price tag matches though.

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    Re: Favorite Grinding Disc For 4 1/2 Angle Grinders ?

    I used to buy the Sait wheels from Lehigh Valley Abrasives, they were cheap and cut really well.

    https://www.lehighvalleyabrasives.co...20060-uas20060

    Looks like the Metabos are currently cheaper:

    https://www.lehighvalleyabrasives.co...o-gw4-1-2-a24r

    LVA is generally the best source when it comes to price and quality...

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    Re: Favorite Grinding Disc For 4 1/2 Angle Grinders ?

    I see you are into the buy once, cry once, get the best but I do the opposite.



    I buy local, cheap, in person, no shipping.

    I find solid abrasive wheels last me a long time, just carbon steel no stainless or whatever.

    The ones I use are super thick, certainly not 1/8"
    I'd pick up one of each you can get at HF, or HD and pick the one you like...or doesn't explode in your face.



    Instead of just one grinder, Get a HF angle grinder and dedicate it to a thin cut off wheel - no wheel changes. get another and use it for wire wheeling.

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    Re: Favorite Grinding Disc For 4 1/2 Angle Grinders ?

    Quote Originally Posted by 12345678910 View Post
    I see you are into the buy once, cry once, get the best but I do the opposite.



    I buy local, cheap, in person, no shipping.

    I find solid abrasive wheels last me a long time, just carbon steel no stainless or whatever.

    The ones I use are super thick, certainly not 1/8"
    I'd pick up one of each you can get at HF, or HD and pick the one you like...or doesn't explode in your face.



    Instead of just one grinder, Get a HF angle grinder and dedicate it to a thin cut off wheel - no wheel changes. get another and use it for wire wheeling.
    it depends how much grinding you do, I've spent alot of time hand prepping 24 inch sch 60 pipe by hand with a grinder in my time (WPS not allowing for flame or plasma cutting and being on site so no lathes or clamshell's).

    Cheap grinding disk's are 1/4 the price and last 1/10th as long or less while also have worse metal removal rate, the cubitrons last 10 times longer than a flexovit disk (industry standard in my country, don't know about yours) removal metal almost twice as fast and only cost 4 times as much, well worth the investment IMO.

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    Re: Favorite Grinding Disc For 4 1/2 Angle Grinders ?

    Quote Originally Posted by Kelvin View Post
    I used to buy the Sait wheels from Lehigh Valley Abrasives, they were cheap and cut really well.

    https://www.lehighvalleyabrasives.co...20060-uas20060

    Looks like the Metabos are currently cheaper:

    https://www.lehighvalleyabrasives.co...o-gw4-1-2-a24r

    LVA is generally the best source when it comes to price and quality...
    X2 on Sait wheels. I won't use anything else. The fast wheels degrade fast, but they move a lot of material FAST. I don't have a love affair with the grinder, and just want to get done with the work. So called "long lasting" wheels are like watching paint dry.


    Note how I'm using a half worn out wheel WITH REDUCED SURFACE SPEED because of the reduced diameter. As the disc wears, it cuts slower. There isn't a disc out there that will remove metal this fast even when worn. I love these things.
    Last edited by farmersammm; 06-26-2021 at 07:42 AM.

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    Re: Favorite Grinding Disc For 4 1/2 Angle Grinders ?

    When looking for wheels, look for the type of bonding resin/material used. If you need a wheel to last long, while removing less material...............you need a hard bond. If you want a wheel that knocks material off fast...............look for a soft bond wheel (soft bond wheels expose fresh abrasive fast as they cut).

    Hard bond is best for grinding welds. Soft bond is best for grinding steel.

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    Re: Favorite Grinding Disc For 4 1/2 Angle Grinders ?

    Quote Originally Posted by ttoks View Post
    3M cubitron 2.

    https://www.3m.com/3M/en_US/p/d/b40065261/

    if you want the best, that is it, the price tag matches though.
    That or the 987c/982c fibre discs. Those move metal out of the way fast!
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    Re: Favorite Grinding Disc For 4 1/2 Angle Grinders ?

    Quote Originally Posted by farmersammm View Post
    When looking for wheels, look for the type of bonding resin/material used. If you need a wheel to last long, while removing less material...............you need a hard bond. If you want a wheel that knocks material off fast...............look for a soft bond wheel (soft bond wheels expose fresh abrasive fast as they cut).

    Hard bond is best for grinding welds. Soft bond is best for grinding steel.
    Agreed......and I will add resist the temptation to use a soft bond on a hot weld as you will wear it out real quick.


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    Re: Favorite Grinding Disc For 4 1/2 Angle Grinders ?

    I have done a LOT of 4 1/2" angle grinding in my life,,
    what I have found is that I have a hard time telling one wheel from the next, as long as the super cheap wheels are not used.

    I can tell the super cheap wheels,, but, that is it,, the others seem the same.

    One thing I do notice, is my Milwaukee 4 1/2" cordless angle grinder runs S ~ L ~ O ~ W ,,,,
    its slow speed really reduces metal removal,,
    When I want to remove LOTS of metal,, I have several corded angle grinders,, they all cut metal FAST!!

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    Re: Favorite Grinding Disc For 4 1/2 Angle Grinders ?

    Quote Originally Posted by SweetMK View Post
    I have done a LOT of 4 1/2" angle grinding in my life,,
    what I have found is that I have a hard time telling one wheel from the next, as long as the super cheap wheels are not used.

    I can tell the super cheap wheels,, but, that is it,, the others seem the same.

    One thing I do notice, is my Milwaukee 4 1/2" cordless angle grinder runs S ~ L ~ O ~ W ,,,,
    its slow speed really reduces metal removal,,
    When I want to remove LOTS of metal,, I have several corded angle grinders,, they all cut metal FAST!!
    True, Not many actually run at 12,000 RPMs, probably to "conserve" battery life. Most are probably in the 7500-9000 RPM range.
    1st on WeldingWeb to have a scrolling sig!

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    HTP Microcut 875SC

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    Re: Favorite Grinding Disc For 4 1/2 Angle Grinders ?

    I forgot to say the I purchased a case of grinding stones at same as grinder.
    Both grinder and stones are 20 years no employees had chance of using grinder.

    The grinding stone are 24 grit 4 " diameter for structural. Now life time supply.
    I purchased all grinding stones by case so also have life time supply of 6" stones too. They all American made and spec out for my work.

    You would be suprises how fast employees can go through stones and grinders.

    Dave

    Quote Originally Posted by Jonath108 View Post
    Hi everyone,
    Need some advice as to what type of grinding disc for removing a messy weld. I have a Metabo 4 1/2 angle grinder , which is 11 amps and 11.000 rpm.
    I usually run 5/32 7018 on 1/2 a36 steel plate. I have seen 1/8 thick wheels that can grind on the edge and appear to work very well. I just have not tried them yet. I think they were Pferd and made in Germany.
    Thanks in advance,
    J

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  23. #14
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    Re: Favorite Grinding Disc For 4 1/2 Angle Grinders ?

    Quote Originally Posted by 12345678910 View Post
    I see you are into the buy once, cry once, get the best but I do the opposite.



    I buy local, cheap, in person, no shipping.

    I find solid abrasive wheels last me a long time, just carbon steel no stainless or whatever.

    The ones I use are super thick, certainly not 1/8"
    I'd pick up one of each you can get at HF, or HD and pick the one you like...or doesn't explode in your face.



    Instead of just one grinder, Get a HF angle grinder and dedicate it to a thin cut off wheel - no wheel changes. get another and use it for wire wheeling.
    Thanks,
    Thats why I have 2 other grinders, Metabo and Bosch.
    Last edited by Jonath108; 06-26-2021 at 10:46 AM.

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    Re: Favorite Grinding Disc For 4 1/2 Angle Grinders ?

    Thanks to all who shared their wisdom.

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    Re: Favorite Grinding Disc For 4 1/2 Angle Grinders ?

    Walther flexcut and anything from pferd. Check out their new victograin.
    Sanrex Sanstick 140s(hotstart&dig set perfectly)
    Thermal Arc 185( if you've used one u know)
    Thermal Arc 400 gms
    Miller Shopmate 300( best wire arc!)
    Miller 75dx feeder
    Miller Passport
    Miller s22p12
    Everlast 210stl
    30a

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    Re: Favorite Grinding Disc For 4 1/2 Angle Grinders ?



    I had previously used Walter and Klingspoor but am now totally sold on the price and quality of abrasives from Weldcote Metal.


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    Re: Favorite Grinding Disc For 4 1/2 Angle Grinders ?

    Don't do what I did. Accidently picked up the 5" ones because they were on sale without looking. Guess I'll be running one with no guard...
    250 amp Miller DialArc AC/DC Stick
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    Re: Favorite Grinding Disc For 4 1/2 Angle Grinders ?

    Quote Originally Posted by whtbaron View Post
    Don't do what I did. Accidently picked up the 5" ones because they were on sale without looking. Guess I'll be running one with no guard...
    Sounds to me like a good excuse to pick up a 5 inch grinder.


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  32. #20
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    Re: Favorite Grinding Disc For 4 1/2 Angle Grinders ?

    Quote Originally Posted by Lis2323 View Post
    Sounds to me like a good excuse to pick up a 5 inch grinder.


    Sent from my iPad using Tapatalk
    I much prefer 5" grinders with a rear handle.

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    Re: Favorite Grinding Disc For 4 1/2 Angle Grinders ?

    Quote Originally Posted by 12V71 View Post
    I much prefer 5" grinders with a rear handle.
    Rear handle ? You mean a rat-tail type body? Or?


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    Re: Favorite Grinding Disc For 4 1/2 Angle Grinders ?

    Quote Originally Posted by Lis2323 View Post
    Sounds to me like a good excuse to pick up a 5 inch grinder.


    Sent from my iPad using Tapatalk
    Was thinking the same thing as I typed it.... hmmm.... DeWalt or Milwaukee ?
    250 amp Miller DialArc AC/DC Stick
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    Re: Favorite Grinding Disc For 4 1/2 Angle Grinders ?

    Quote Originally Posted by whtbaron View Post
    Was thinking the same thing as I typed it.... hmmm.... DeWalt or Milwaukee ?
    Mostly Makita for me...




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    Re: Favorite Grinding Disc For 4 1/2 Angle Grinders ?

    Hmmm..... I don't have one of those.... 9" DeWalt, 9" Blue Point air, 4.5 DeWalt, 20 v. DeWalt, Milwaukee, 4.5" and a 4.5" Hitachi...https://www.amazon.ca/Makita-GA5030K...71&s=hi&sr=1-4
    Last edited by whtbaron; 06-27-2021 at 08:37 PM.
    250 amp Miller DialArc AC/DC Stick
    F-225 amp Forney AC Stick
    230 amp Sears AC Stick
    Lincoln 180C MIG
    Victor Medalist 350 O/A
    Cut 50 Plasma
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    Re: Favorite Grinding Disc For 4 1/2 Angle Grinders ?

    Quote Originally Posted by Lis2323 View Post
    Mostly Makita for me...


    Sent from my iPhone using Tapatalk
    I've personally never understood the idea of having a seperate grinder for each type of wheel, it takes longer to swap the grinder over than it does to change to a different wheel anyway.

    I have 3 grinders.

    a 720 watt 5" bosch for tight spaces as it has a very small and handy body.

    A 1700 watt 5 inch Metabo for the heavy duty grinding that doesn't warrant something bigger

    A 2200 watt Makita 9 inch for the really heavy jobs or where I need the depth of cut

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