Abrasive belt help.....

[mrtoolfool]

I have a Dynafile that I haven't used for some time. I needed it today and all my belts are popping at the splice.
This happens right after I put the belt on, no load. They are 1/2" & 3/4" x 18 belts

I'm sure it is the adhesive splice on the belts that have gotten old and are now giving way.

I have probably 100 different new belts by 3m, Norton, etc. and would like to figure a way to re-glue them together.

Does anyone know a fix other than buy new ones, which I already did to get my job done.

Thanks

 

[Walkers]

Pitch em and get on with life! You will probably waste more time and money trying to save them than they are worth.

 

[Jgaz]

I’m following this.

I had a belt assortment from Klingspor. Good quality belts. Once one let go at the splice they all seemed to follow.

I tried a couple kinds of contact cement, 3m weatherstrip cement, and the thinnest epoxy I could find.
The epoxy was the only thing that showed any promise.
I couldn’t get a perfectly flat joint. There was always a bit of a bump that made the belt aggravating to use.

I‘m in Phoenix. My belts are stored in the house and I keep a smaller assortment on hand.

 

[nadogail]

I agree that fresh new belts will be your best bet. An epoxy bonded splice will not be flexible on the rollers.

 

[mrtoolfool]

Pitch em and get on with life! You will probably waste more time and money trying to save them than they are worth.

If I can spend a couple hours of TV time fixing over 100 belts worth 200.00 to 300.00 that's advantageous to me.
If these were harbor freight belts, I wouldn't mess.

Now, it's not about the money either. I happen to be one of those people that ENJOY learning how to repair stuff.
Maybe, just maybe, that's why I am on this forum.

 

[Walkers]

If I can spend a couple hours of TV time fixing over 100 belts worth 200.00 to 300.00 that's advantageous to me.
If these were harbor freight belts, I wouldn't mess.

Now, it's not about the money either. I happen to be one of those people that ENJOY learning how to repair stuff.
Maybe, just maybe, that's why I am on this forum.

Well, if you enjoy sanding belts flapping in your face then this is the perfect opportunity for you. I suspect you will spend 50 bucks on different glues as well as the time spent gluing them up, and in the end they will pop off after a few minutes use. Adhesives that can tolerate flexing, tension, and heat are special for sure. Apparently even the manufacturer of the belts can't get it right, so repair of them would seem to be destined for failure as well.
I too enjoy repairing things, but after a lifetime of doing it I have learned to stick with ventures that have a high degree of sucess.

Best of luck to you.

 

[larry4406]

Wow.

I thought this was from @PelicanPines

Meanwhile back to regularly scheduled programming…

 

[PelicanPines]

Wow.

I thought this was from @PelicanPines

Meanwhile back to regularly scheduled programming…

All my lubricants/abrasives are in fine condition, thank you very much.

I would replace them... and store them in a plastic box... with proper labels.

 

[RTM]

I just bought some new dynafile belts and they were all taped together at the seam, not lapped and spliced like the old ones. Non Woven, then 50 grit




The belts both came off Ebay, Proabrasives & Econoway Abrasives.

Checked ebay for Sanding belt tape, and several items came up, for different grades.

Another search revealed this.
https://www.toolbarn.com/products/metabo-623530000

 

[Kuma601]

I had this not long ago. Some guys suggested some 3M tape but reading others accounts is that it was not a secure fix. I have a bunch of 2x72" belts that are"new" yet useless. The abrasive supplier relays to me that shelf life is 2 years best and better to use the belts in a year. Humidity, dryness and heat factor in.

That said, I have belts that are ranging from 5-25 years old and have not had problems. The ones that do are the Trizact or Norton structured and some of the coarse 36-40 grit ones. Across a variety of manufacturers I've had **** splice failures: Norton, 3M, Klingspor, YMMV.

I certainly don't want a belt to catch or let go when I have a workpiece being ground. Pitch them or repurpose for manual sanding and get some fresh ones. I know it isn't wallet fun though that is my experience. I have a stack of about 10 more. About $250 in IDK what to do with these belts now.



I cut the structured ones up to use like these:

 

[lilredex]

I have had good results using fabric cement and squares of denim material, for that joint.

 

[alfadan]

There are glues for making machinery flatbelts. They require heat to set.

 

[PelicanPines]

There are glues for making machinery flatbelts. They require heat to set.

My uncle used a "Banding Iron" to make his belts...