Abrasive Belt recommendations

Joined
Nov 29, 2015
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I'm looking for recommendations on abrasive belts. I'm going to need to purchase some more in the near future and would like some experienced guidance before spending my money.

I have a 2x72 KMG style grinder that I built from scratch almost 20 years ago. I originally built it for the purpose of making knives as a hobby (right before I got married). Due to a lack of time (wife, house maintenance, kids, garden, vehicle maintenance, and other hobbies) I have only made a few and even then, it's been a while since the last time I made any. I'm currently making a few knives for my own use, but I'm not sure if/when I will start on more once these are done. The grinder has mainly been used to sharpen mower blades (commercial mower with a 60" deck), or bevel and prep metal for various welding projects over the years. At one point I had LOTS of different belts for the machine because I was trying everything I could get my hands on just to figure out what worked well for me. I still have a lot of those belts, but they don't last long. The typically fail at the seam long before the get dull. I presume this is because the belts are old and my grinder is in a non-controlled environment along with the belts. A couple of years ago I broke my last zirconia belt and bought a few coarse ceramic belts from Red Label. Some of them are already wearing out quickly on me (breaking at the seam). Are there any brands that hold up relatively well over time? Is there a recommended way I could store them so that the seam holds up better? I currently have an ax handle laying between two ceiling joists with the belts hung over it, and a short piece of 2x4 laying through them at the bottom to keep them from curling up like a ribbon at Christmas. I also have a 1x42 belt grinder (Delta) that I have the same issue with. About the only other storage location would be in my basement, but I would have to leave them boxed up so they could be stored on a shelf. They would still see humidity in the summer, but no extreme heat. I heat with wood, so its really dry down there in the winter. Anyway, I'd love to hear others thoughts on this.

Thanks in advance,
Mark
 
Grind more, use your belts faster! 😁

I don't have any GOOD advise, but maybe don't buy quite so many at a time?
 
Yeah, I'm going to limit my purchases to two belts per grit. I normally have a 36grit zirconia belt on for heavy stock removal (mower blades and beveling joints to be welded), and a 120 grit zirconia belt hanging on the wall for those times when I don't want to take off quite so much, quite so fast, or at least I don't want to leave a big burr. Anything else I buy would be used for making blades. Since I'm in the process of making a few, I'm going to need a couple of other (finer) grits. When it's all said and done, I may end up using my 1x42 to sharpen them just because the micron belts are cheaper so I won't be wasting as much $$ on the leftovers....
 
the way you store your belts will 100% affect their life span.. in the Best storage with climate control you might get a year or so .
i have made a phone call to a very popular supplier to find out many belts at the seem/joint are very temper mental about the climate they are stored in
mine are in a well insulated building with a dehumidifier running 24/7.. i had a batch of belts all come apart at the seem..
 
Sounds like I should leave them in the box and store them in the house until I'm ready to use them. On the 36 grit belts that I bought 20 years ago, I'd say they were fine for the first 10 years. Back then I only had a flat platen with 2" wheels on the top and bottom. Now I do most of my heavy work with a 10" contact wheel. I would think the larger bend radius would prolong the life span a little bit. Either way I slice it, it sounds like I shouldn't bother trying to have more than 1 spare belt per grit on hand unless I have plans to actually put them to use. It looks like 1x42 belts are about the same cost as the 2x72, so there's not really a benefit in trying to keep a few of those on hand for other random purposes other than the fact that they are easier to store.
 
If the seam gives out, you might still get some use out of them. I like splitting lengths off belts to shape and polish handles.
 
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