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I Forge Iron

subzeroblades

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  1. I've been making knives for around ten years now. My first belt grinder was the HF 4x36 modified with a HF 1hp motor. It's a belt driven sanded so the mod was simple. That thing didn't throw a single spark until I put the one horse on it. I've had the 1x30 as well it's worthless for anything but scales. My advice is to build your own 2x72 out of an old weight bench and running machine engine. Mine is made from square tubing and a running machine. I used longboard wheels for the platen and idler and a piece of pipe for the drive wheel. The building process will help get you familiar with all your tools so by the time your making a forge burner you won't be so green and might just keep all ten fingers and your eyebrows as well. Just remember the more time you put into a project the more satisfying it is to finish. I hope you keep at it. I'll post pics of my grinder in case you want to build one. It cost me around 100 bucks including 3 ceramic belts.
  2. One idler pulley and you could run a 2x72 and your belts would last longer and not heat up as much. There may even be more belt options available for 72 than for 48 since it's the preferred knife grinding length. Just a thought.
  3. The tubing you used is the wrong guage. You should use 2" x1/4" wall tubing for frame and 1 1/2" x 1/4" wall tubing for tool arms and your tension/tracking arm. You have to file the weld seam inside the 2" and then polish up the 1 1/2 inch with a flap disc on a angle grinder until it just slides in with a little grease. It doesn't take long and you will have zero play. You also end up with a rock solid frame that barely vibrates and has much less noise. Your local metal dealer should have both sizes for around 80 cents a pound. For example the frame with two tool arms just cost me 40 bucks. If you can't find those the next best thing is to get on offer up and find a weight bench with tubing that has similar tolerances. I've made awesome machines from home gyms as well.
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