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Horizontal 2 X 72 Project

Discussion in 'Grinders' started by dancom, Feb 18, 2020.

  1. dancom

    dancom Dust Maker Best Shop Tool

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    I have been pottering around the shop the past month working sporadically on a horizontal belt grinder which I hope will come in handy. Some of the features I wanted was a fairly long flat platen, a 4" rubber contact wheel (because I've never had one of those before) and a small wheel set.


    [​IMG]

    I did a very simple CAD drawing and got a chunk of 1/4" steel cut with some holes here and there. This is the trial fitting of the major components. The aluminum 4" drive wheel and 3" tracking idler are from Kevin at Nexus Grinders in Raymond Alberta, the small wheel holder is from Vashti Grinders in B.C. with a 2" glass-filled nylon wheel is from my spares drawer originally from Origin Blade Maker in Oregon USA. The rubber contact wheel is wheel is from L-Paladin on AliExpress, the gas spring is from Princess Auto's surplus shelf. And lastly the motor is a single phase 1 horsepower 4 pole (1750 RPM) IronHorse from Automation Direct in the USA.

    The rest of the parts are mostly from surplus angle, HSS and some 1/4" plate steel that I had kicking around the shop. A teeny bit of splatter welding here and there and Bob's Your Uncle. Nothing some heavy paint can't hide. ;).

    The belt sits about 3/4" above the table so the tracking wheel axle, 1/2" NC bolt's head has some room. This space allows a little forgiveness when tacking a new belt.

    [​IMG]

    I wanted the work rests to be height adjustable to make the most use of the whole belt surface and not just wear a groove at the 1/2 way mark like Jim Clow @boatbuilder suggested. also I want to be able to tilt the tables 45°. But wait, there's more. It would be nice if the tables could rotate on the Z axis. Once all rolled into a single idea, I came up with this kind of thing.

    [​IMG]

    The smallest wheel 1/2" will be whizzing around at about 14,000 RPM, so I will expect to have to replace the bearing the soonest on that one. Less so whizzy on the 3/4" and 1" wheels.

    The flat platen area is 14.5" long. This can be scaled back to 12" and a little bit of slack belt would be exposed before the rubber wheel. We'll give the longer one a try and see if it needs to knocked back.
    [​IMG]

    The bottom shelf is lined with 3/4" plywood, to which I will sling a sand bag or two for ballast. She tips and rolls on two caster so I can move it around without being rewarded with a hernia.

    There's a couple of things that I would do differently, namely making the frame from HSS rather than angle and skip the angled braces in the back. I might cut out a curve from the backside to expose a generous slack-belt area. I am also going to make an attachment for a shop vac and maybe some strategically placed holes for dust control, anti-static brush and so on. Once it's up and running for a few months, I will let you know how it goes.

    Dan
     
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  2. dancom

    dancom Dust Maker Best Shop Tool

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    Some pics from yesterday. I added the power switch and got the belt tracking setup.
    [​IMG]

    Also installed and painted the bottom shelf.
    [​IMG]

    Dan
     
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  3. Magnus

    Magnus New Member

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    Nice work! That should be a great addition to the shop.
     
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  4. dancom

    dancom Dust Maker Best Shop Tool

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    I was using it a little bit last night. It works really well. The long work rests need a bit of polish. I think I am going to need some heatshrink (as described by @Kevin Cox) to slip over the nylon wheel for protection. It runs on the abrasive side of the belt. I can see that wearing down pretty fast with a 60 grit ceramic on there. It's pretty solid and doesn't need a sandbag and there's no real vibration going on. So far I am very happy with the investment. Now back to making knives.
     
  5. Griff

    Griff Active Member

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    Awesome Dan! So useful. Call me crazy but I like the idea of a dedicated horizontal grinder better than a tilting grinder. Not knocking them as one of my grinders I modded to tilt, and seeing this I think I might change it into a permanent horizontal.
     
  6. dancom

    dancom Dust Maker Best Shop Tool

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    It's kind of a pain switching tool arms and belts. I normally use the flat platen, then switch to a small wheel, then back to the flat platen. If you do this while stepping through more than a few belts the time really adds up.
     
  7. ConnorBC

    ConnorBC Active Member

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    What a great idea! We've sent a TON of guys to the plans on your website over time and they are going to ABSOLUTELY love this addition! :D

    The small wheel holder is definitely NOT ours though. Looks like a copy of someone else's holder...
     
  8. dancom

    dancom Dust Maker Best Shop Tool

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    Thanks Jo!

    I stand corrected. I got my first small wheel holder for the Sayber OSG from you. This is one of the Nexus ones. The classic hockey puck small wheel holder is a Vashti original. ;-)

    Dan
     
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  9. dancom

    dancom Dust Maker Best Shop Tool

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    Does yours still have the flat washers? I'd like that better when working with the rollers running vertically. They don't tip over as easily when changing belts. I might look at adding some magnets.
     
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  10. ConnorBC

    ConnorBC Active Member

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    Hahaha! We are STILL rocking the hockey puck holders in the workshop over the steel holders. ;)
     
  11. ConnorBC

    ConnorBC Active Member

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    Ours have evolved. :) Still has the open race on the bearing retainer plate and still has the hands free roller entry. It now has a slotted channel to allow it to be aimed at the drive wheel to eliminate the need for 2 idlers on most grinder chassis' ORIGINAL Vashti style! :D

    https://vashtigrinders.com/collections/rift-series
     
  12. dancom

    dancom Dust Maker Best Shop Tool

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    So you mean drive wheel and small wheel? The small wheel holder does the tracking?

    Dan
     
  13. ConnorBC

    ConnorBC Active Member

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    No, it still works with the chassis tracking wheel performing the tracking task, however it will not require 2 rubber idlers (on most chassis') to take advantage of the full radius of the small roller. The channel on the holder itself will swivel allowing the belt to align with the drive wheel. We left both idler mounts on the holder however, for grinder chassis' that it will not work with. I'd post a picture, but I don't have a photo hosting app...
     
  14. dancom

    dancom Dust Maker Best Shop Tool

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    Very cool Jo. Thanks!
     
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  15. ConnorBC

    ConnorBC Active Member

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    No trouble! :) I can send you better pics of the holder installed. We did this to accomodate the new single arm chassis format we are now using. It works beautifully on our previous grinders chassis' as also. Our 2X48 chassis have a tool arm slot that splits the difference between the tracking wheel height and the drive wheel making the 2 rubber idlers easier to use.

    I'll be watching your project take shape! I can really see the value in the dedicated horizontal setup this way, especially in a shared workspace! Your contribution to the knife making industry is certainly appreciated by all!
     
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