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Old 05-09-2019, 10:31 AM
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Just bought this gizmo..It's a real money saver. Trims sanding discs to the next smaller size. Four to be exact..I could have bought a bunch of them for the amount of money I've thrown away...
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Old 05-09-2019, 10:48 AM
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You got a link?

Why would you want to trim sanding discs down, and not just buy the correct size?
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Old 05-09-2019, 11:09 AM
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Probably when he uses just the edge of them, then trim them down to the next size, to use the edge again.


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Old 05-09-2019, 11:32 AM
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Where I worked years ago we would cut 9" disks down to 6" saved a lot of money for the co. The maintenance guy made the cutter
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Old 05-09-2019, 01:13 PM
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Quote:
Originally Posted by toprecycler View Post
Probably when he uses just the edge of them, then trim them down to the next size, to use the edge again.


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Exactly that. I used to save a bunch and then edge them on the belt sander. It was kinda hokie but it worked.
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Old 05-09-2019, 01:24 PM
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Quote:
Originally Posted by toprecycler View Post
Probably when he uses just the edge of them, then trim them down to the next size, to use the edge again.


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Right you are. Just triMS the edge. Big money saver.
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We should have picked our own cotton...

I love my women hot and my beer ice cold..
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  #7  
Old 05-09-2019, 02:14 PM
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Here's a link...

https://www.morganmfg.com/ab_cat05.htm
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Don't pick a fight with an old man. If he is too old to fight, he'll just kill you... John Steinbeck

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We should have picked our own cotton...

I love my women hot and my beer ice cold..
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  #8  
Old 05-09-2019, 02:31 PM
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Hmmmmm, I must be doing something wrong my discs wear out evenly across the face...
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Old 05-10-2019, 10:05 AM
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Quote:
Originally Posted by Shade Tree Welder View Post
Hmmmmm, I must be doing something wrong my discs wear out evenly across the face...
Post a pic of the tool you are using..Mine will not let me do that. Disc retainer hits before I can get flat...Sounds like your retainer is recessed.
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Don't pick a fight with an old man. If he is too old to fight, he'll just kill you... John Steinbeck

"If we ever forget that we're one nation under God, then we will
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We should have picked our own cotton...

I love my women hot and my beer ice cold..
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  #10  
Old 05-10-2019, 01:06 PM
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Quote:
Originally Posted by Shade Tree Welder View Post
...I must be doing something wrong my discs wear out evenly across the face...
Yeah, same here--by the time we're finished with a sanding disc it's all used up...

Quote:
Originally Posted by moe1942 View Post
...Mine will not let me do that. Disc retainer hits before I can get flat...Sounds like your retainer is recessed...
If you buy proper sanding pads--the ones made by 3M come to mind--you get a backing plate that is recessed in the centre and a retainer nut that is low profile and tapers to the outside. With this setup the nut sucks down in the centre of the disc so you can use just about the whole face. Depending on what you're sanding you usually tend to use the OD of the disc more than the centre but you can still use enough of the face that there's not point in cutting them down.

We use nothing but 36 grit blue zirconia discs for the majority of our sanding. Favourite brands are Klingspor or Pferd--for whatever reason these seem to work and last better than anything else. They can be a touch coarse for the first 5 minutes of use but they break down pretty quickly and then you are left with a disc that will still remove a lot of material and leave a nice surface finish. If we need anything finer than that we switch to a brown (coarse) Scotchbrite pad--we seldom do that on anything but aluminum that needs an almost polished surface.

One of the mistakes that a lot of people make when it comes to sanding is to use too fine a disc. A brand new 36 grit disc will remove more material than the average grinding wheel for the first 5 minutes or so of its life. After that a grinding wheel will be faster but, of course, it's harder to get a smooth, flat surface with a grinding wheel--you tend to get highs and lows which often need to be sanded out anyway. Sometimes you're better off just to go at the job with a sanding disc from the beginning.

And since we're on the subject, a thought on grinding discs too. A lot of the manufacturers make their grinding discs too hard--they don't break down fast enough and you put too much effort and time into grinding down welds and the like. After a lot of experimenting we have found that the discs made for aluminum work really well on steel. They seem to have a more open, softer grain and they do break down faster than most discs made for steel but man, can they ever remove material. Sure they don't last as long as a steel disc but the time and effort required to remove a given amount of material is less and, as far as we're concerned, a lot more cost effective. Sanding and grinding discs are consumables and as such, are meant to be used up. Finding a balance between disc life, effort expended and material removed can make life easier all the way round...
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