My 1x30 grinder and some mods

Discussion in 'Other Tools' started by Skeptiksks, Feb 13, 2018.

  1. Skeptiksks

    Skeptiksks Green Haired Weirdo Supporter

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    I bought a 1x30 grinder to get a bit more serious about making knives. While definitely not as awesome as a 2x72 it is portable and I can keep it in my tiny apartment. It isn't perfect, but it will do what I need it to for the time being.

    20180212_184121.jpg

    There it is, pretty basic harbor freight model, as you can see I already removed the dust cover, I didn't need it and it just got in the way of belt changes.

    Something else I noticed was the swing arm/tensioner/whatever didn't move freely at all so I took it apart and removed some of the night spots (albeit lazily and sloppily)

    20180212_185226.jpg 20180212_185917.jpg

    Once that was done it was time for a table upgrade. The stock table is much too small and those dumb grooves in the table really like to catch on your work piece.

    I have a few pieces of raceway cover from an elevator build kicking around. It's not the thickest or the strongest stuff, but it will work for my purposes. First things first I had to trace out the opening for the original table.

    20180212_190724.jpg

    Next up I drilled through the new table and into the old one so I can tap and thread the holes to mount the new table to the old.

    20180212_191623.jpg 20180212_191951.jpg

    Drill some holes in the new table top and use some sort of cutoff wheel to cut out the hole in the table and the channel to pass the belts through to change them out.

    20180212_193027.jpg 20180212_194540.jpg

    Now you can clean up your cuts and just get everything all nice and deburred. Also at this time you can countersink your holes so that the screw heads lay flush or slightly under the face of your new table, you don't want your work catching on a screw head. I actually had to go over the countersink again after I laid to table down as my material was so thin that the screws hit the original table before being all the way flush with the top.

    Now that that is all done you can begin your assembly and put everything back together.

    20180212_195724.jpg 20180212_200501.jpg

    Boom, done. Quick and dirty. This took me about an hour start to finish. I haven't been able to use it yet but I imagine it will work just fine. Pretty stoked to get grinding and see what else needs to change on this puppy.

    Thanks for looking y'all
     
  2. cbrianroll

    cbrianroll Professional Tinkerer Supporter

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    That looks way better! Is it flat at all?
     
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  3. NevadaBlue

    NevadaBlue Graybeard Supporter

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    Nice, I like what you have done. The belt adjustment on mine just doesn't work. I guess I will take it apart and see what's up. I may use a piece of plastic cutting board for a larger table, hadn't thought of that. Thanks!
     
  4. Skeptiksks

    Skeptiksks Green Haired Weirdo Supporter

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    It is indeed flat. I am considering beefing it up though as it is kinda flexible.

    Mine didn't work either, jammed stuck and basically glued together with the cheap paint. The cutting board is a great idea though. I have a huge sheet of delrin that might be perfect for it, though it is pretty heavy duty.
     
  5. DarrylM

    DarrylM Guide

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    Have you considered a dust collection plan? Do you have enough non-flammable surfaces around the sander that metal sparks won't cause problems?
     
  6. Skeptiksks

    Skeptiksks Green Haired Weirdo Supporter

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    I use it outside on my concrete patio so that isn't much of a problem. Pretty sure the woman of the house would kick my butt if she caught me grinding in the house haha
     
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  7. cbrianroll

    cbrianroll Professional Tinkerer Supporter

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    Oops, my post was supposed to ask if it flexes at all. (Dumb phone)
     
  8. DarrylM

    DarrylM Guide

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    She seems to tolerate a more manly atmosphere in the living space than most of the rest of us can get away with. But good call not testing the limit, there.
     
  9. Skeptiksks

    Skeptiksks Green Haired Weirdo Supporter

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    Hehe yeah, I certainly got me a keeper. But that's my space, she has the rest of house to decorate and fuss over. She knew from the get go that I need a place to work other wise I get grumpy lol
     
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  10. mtnoutdoors

    mtnoutdoors Guide

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    Nice mods thanks for sharing. I been looking at that same grinder. I think it well do what I want it to do. Thank you if I do get one I well know what to do to it to make it work much better. Prov 27 : 17
     
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  11. J. Pierce

    J. Pierce Athletic Supporter Supporter

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    Nice improvements, needed ones too.
    I have a 2X72, and I still find plenty of uses for my noisy little HF.
     
  12. UAHiker

    UAHiker Supporter Supporter

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    nice! i've been wanting to pick one up myself but more for wood working and some metal working then knives but those things have a million uses!
     
  13. Kona9

    Kona9 Supporter Supporter

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    Nice work. Mine came with two tables so I might need to modify one of them.
     
  14. ozwolf

    ozwolf Scout

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    Nice mods.
    I haven't modded mine at all and I've had it for 3 or 4 years.
    I use it a ton it's performed above it's price range.
     
  15. nograveconcern

    nograveconcern Hobbyist Hobbyist Bushclass I

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    Mods look good. Throw out all the plastic safety crap first thing. You will never use it. I didn't clean out the paint on the tracking bolt. I should have, but it self clearanced over time. ;)

    You don't really use any of the work rest behind the belt, so if you were to do it again I would extend the work rest in front of the belt. Old cutting boards (HDPE) from goodwill are a good material to use. 1/4-3/8" thick and easy to drill. Your angle blocks will slide easy on them and they are stiff enough for a work rest.

    One problem with the HF grinder is that there is not really enough throw to the tracking adjustment. If you can get it to track far enough to get a 1/4" of belt hanging off either side of the the platen that will help a lot with grinding your plunge lines.

    Another problem is lack of belt tension for convex grinding. I pulled the platen off and clamped a piece of flat bar steel against the frame of the grinder and the back of the belt to sort-of push out and tight when working on convex.

    You can do a lot with a HF 1x30. However, I recently retired my 1x30 and built a new one. :D
    Screenshot_2.png
     
    Last edited: Feb 14, 2018 at 9:26 AM
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  16. Jim L.

    Jim L. Scout

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    I was having the same problems that @Skeptiksks was having with my HF 1x30.
    I just removed it. No more problems.

    I don't like the short platen and have been thinking about JBWeld'in a ceramic tile in place.
     
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  17. WY_Not

    WY_Not Supporter Supporter

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    Haven't looked that closely at mine yet. Is it possible to remove the original table and install something a bit more robust and bigger?
     
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  18. Jim L.

    Jim L. Scout

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    Yes, it's held in place by a single screw and nut.
     
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  19. nograveconcern

    nograveconcern Hobbyist Hobbyist Bushclass I

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    You would need to connect a piece of about 2” angle stock, which is typically 1/4” thick, to a large piece of flat something, maybe a 12” piece of 1/4” thick cold roll 6” wide.

    You could do that with countersink machine screws if you are welder limited.

    Then you need a hole drilled in the angle stock for the pivot bolt.

    You will have more money in steel and hardware than the grinder cost.
     
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  20. WY_Not

    WY_Not Supporter Supporter

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    That's it? Yikes. Figured at least a couple of screws.

    Yep. If I'm going to do that much fabbing, I'd rather do it for something worthy.
     
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  21. NevadaBlue

    NevadaBlue Graybeard Supporter

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    I think the little machine is worthy of making modifications or it can be used as-is, depending on what you want it to do. I have been using them for a lot of years and am very happy with them.
    I do need to work over the belt adjustment on one of them, and replace the switch in another, but they have ground a lot of steel and that is just hard on them.
     
  22. nograveconcern

    nograveconcern Hobbyist Hobbyist Bushclass I

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    It’s not a bad machine. Yeah the work rest is little, but I never modified it. Just used it as is.

    Real limits are the lack of throw in tracking like I mentioned, lack of power, and of course the narrow belts.
     

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