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AMK-77 2X72 Grinder

Discussion in 'Shop Talk - BladeSmith Questions and Answers' started by 120 Acres, Mar 15, 2017.

  1. 120 Acres

    120 Acres

    213
    Jan 5, 2017
    Ok, I've been on this for a long time and this is the best deal I've found: http://amktactical.com/epages/3c926a...288.sf/en_US/?

    Comes with both 10 or 12 inch wheel (your choice) and the flat platen for $1,348.99 *includes shipping.

    [video=youtube;bIKlHqXayNY]http://www.youtube.com/watch?v=bIKlHqXayNY[/video]

    Check out the switching @ about 3:07, that's awesome.

    One question though. How can you use the smaller wheels, like say a 1 incher?

    Does anyone know?
     
  2. kuraki

    kuraki KnifeMaker / Craftsman / Service Provider Knifemaker / Craftsman / Service Provider

    Jun 17, 2016
    It's a neat design and there are features about it I like. But being able to switch quickly from a flat platen to a wheel isn't something I need to do regularly, so losing the tool arm style to speed up the swapping doesn't do anything for me.

    I spend most of my time on the flat platen and then switch betweeh 6" wheel, 10", 12", rotary platen, slack platen, small wheel attachment. Rarely back and forth between two of them.
     
  3. pleasanthill

    pleasanthill Basic Member Basic Member

    793
    Feb 12, 2015
    I'm with Kuraki an this one. Pretty neat, but useless for how I work most of the time switching between flat, small and 8" and once I make/buy some more tooling add those to the list.
     
  4. 120 Acres

    120 Acres

    213
    Jan 5, 2017
    I'm new to this and find myself swapping more than I probably should. I just wonder if this is capable of using the smaller wheels.


    And for the price for what you get it seems like a good deal!
     
  5. AVigil

    AVigil knifemaker working the grind Knifemaker / Craftsman / Service Provider Platinum Member

    Feb 17, 2009
    I use a .5", .75", 1.5", 4", 2" and 10" wheels.

    So they really need to figure out how to allow for more wheel sizes.
     
  6. 12345678910

    12345678910

    Jul 13, 2009
    I'd rather have a toolbar and a rigid steel frame
     
  7. 120 Acres

    120 Acres

    213
    Jan 5, 2017
    I guess I will contact them. Just thought someone here would know. I will post my findings if anyone is interested.
     
  8. kuraki

    kuraki KnifeMaker / Craftsman / Service Provider Knifemaker / Craftsman / Service Provider

    Jun 17, 2016
    Well, to answer your question, there doesn't appear to be any reason you couldn't replace the wheel or platen with a small wheel attachment.
     
  9. NC Biker

    NC Biker

    639
    Apr 8, 2014
    That's me too. I want the mass of steel to keep vibration down.
     
  10. knife to a gunfight

    knife to a gunfight KnifeMaker / Craftsman / Service Provider Knifemaker / Craftsman / Service Provider

    Oct 17, 2007
    As with a lot of the different grinder designs out there today, there are a few things I like and appreciate about the AMK, and a few I'm not wild about. Personally, I prefer a tool arm set up, and I'm not sure that the advantages of a "self storing, quick change platen/wheel" configuration really outweigh the advantages you get with an interchangeable tool arm system. If you're the only company that does something, as they claim in the video, there may be a reason. ;)

    At any rate, it looks like a fine machine, and I certainly wouldn't mind having one as a secondary machine for general roughing, deburring etc..., but I'm not sure it would quite fit my needs as a primary machine. If they could figure out a way to implement a small wheel holder without necessarily losing a platen or contact wheel, they they'd have quite a contender. That said, I also think this would fit really well for a mobile work truck setup (or sharpening station, or whatever) as it appears to be relatively compact and light weight, but with plenty of power and capacity.
     
  11. kuraki

    kuraki KnifeMaker / Craftsman / Service Provider Knifemaker / Craftsman / Service Provider

    Jun 17, 2016
    I wouldn't mind it if I had 2 of them. I'd have one set up with a 12" wheel and flat platen and I bet, without a big wheel and platen I could fit a 6" wheel, small wheel and rotary platen on the other grinder. Then I'd never have to change an arm again. Or trip over them because I haven't made a rack for them yet. Ooh I just had an idea that on the 6"/rotary/small wheel machine you could probably rotate it in a way that would let you run the belt under the 6" wheel and over the small wheel to get into really tight radii. That would be cool.
     
  12. Fish30114

    Fish30114 Gold Member Gold Member

    Jan 5, 2014
    I was an early buyer of AMK, and mine has been a good performer for me. Being made of primarily Aluminum has not been a detractor in any way--they sell a small wheel adapter, you simply undo two hex head cap screws and pull the flat platen and place the small wheel attachment on there--I change mine out in about 1 minute- the one they sell works well, the owner Alan will tell you that one needs to run the small wheels slower since their bearings are smaller--so I do--been using mine for about 18 months and no issues with my small wheels at all. The contact wheel they sell the unit with works very well, and mine has shown no wear at all in the time I've had it. All in all I like my AMK--my second grinder was/is a Northridge and it is a better grinder to me, but it was quite a bit more $ for sure.

    I don't think you will have any issues with an AMK if you go that way.
     
  13. kuraki

    kuraki KnifeMaker / Craftsman / Service Provider Knifemaker / Craftsman / Service Provider

    Jun 17, 2016
    I've been running my small wheels on my single speed grinder for over 6 months now. I really only use the 3/4". 3,160 sfpm the whole time. She's been whistling away at 16,100 rpm without a hitch. I know it's going to burn up faster than a bigger bearing, but I haven't done anything about it because I'm going to find out just how much faster :D
     
  14. 120 Acres

    120 Acres

    213
    Jan 5, 2017
    I got a reply back: We have a small wheel fixture that adapts to the AMK-77 .
    You can use wheels from 1/2" to 2".

    So I guess its one more thing to buy.

    [​IMG]

    [video=youtube;vU1BvNC-fDY]http://www.youtube.com/watch?time_continue=49&v=vU1BvNC-fDY[/video]
     
  15. rjedoaks

    rjedoaks

    147
    Sep 15, 2009
    I do the same. Epoxied a piece of automotive heater hose on my 3/4 to try and soften the wheel a bit. It worked somewhat, but now the wheel is 1". Never had a heat issue. I would lightly spritz but really never needed it. Just bought a new 1/2" wheel and that sucker was roasting. Gotta pay attention now


    Sent from my iPhone using Tapatalk
     
  16. Living The Dream

    Living The Dream

    125
    Feb 20, 2016
    I have an AKM-77 single speed . It has been pretty good. I have had the chance to grind on a burr king and a bader variable. Did not notice a huge difference. I do wish that the AKM had variable speed on it, but cash was tight.

    It is quiet and will hawg them out pretty good. I dished the platen out pretty quick. If you don't opt for the hardened platen, put glass over it as soon as you can or harden the platen yourself.

    Good times.
     

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