3M Micron belts

[MaxtheKnife]

good evening besspeople

tonight i am looking for comments.....opinions.....thoughts on using them for belt sharpening......if you use and why and what grit.

i tried some back in 2013 .....i think 9micron & 20 Maybe.......all i seem to remember the razor edges cut my fingers a lot.

standing by

and......anyone tried the 3m 777F belts yet

[grepper]

I’ve used them. I currently have a 372-L 9 micron and I’ve had others. They are a film belt, but surprisingly stiff and flat, but only in consideration that they are, after all, a film belt. Much stiffer than a soft cloth belt, so not as good as a soft cloth belt for things like a bird’s beak blade. As you say, they have very sharp edges. You don’t want to bump your knuckle into the edge of one while they are running. Guaranteed instant epidermal leakage.

They seem like a cross between nylon like stuff and old style photographic film. Thin, stiff, yet flexible. Very different than "regular" belts.

When new, they cut very well but with only moderate lifetime.

Wrong belt if you are looking for a toothy edge, but they can be handy to have around especially for problem edges or if for you are looking for a polished finish.

I don’t use them often, but I’ve found it handy to have a couple in the tool box for special circumstances. For those that have not tried one, it’s probably worth getting one or two on your next belt order just to understand them as another option out there.

My current favorite belt is the Cubitron 150 grit. I have some Cubitron II 120's but they are extremely aggressive. I wish I could find a Cubitron II @ 150 grit.

[Mark Reich]

The most common, highest end, 3µ-ish belt is the Trizact A3.

It is soft. F weight, I believe.

There is an enormous difference between a 3µ Trizact and 4µ PDP, or even CBN, on leather or linen. Trizacts minimize tooth at rated grit. PDP maximizes tooth at rated grit. CBN falls in the middle, but an application doesn't last long.

Linen belts are Much stiffer than F weight cloth as well. I have always liked CBN on linen for deburring, but PDP on leather deburrs without killing tooth.

[MaxtheKnife]

[quote='grepper' pid='2182' dateline='1516163288'

My current favorite belt is the Cubitron 150 grit.  I have some Cubitron II 120's but they are extremely aggressive.  I wish I could find a Cubitron II @ 150 grit.
[/quote]
.


ok mr grepper
where can i buy a few?
thanks

[MaxtheKnife]

The most common, highest end, 3µ-ish belt is the Trizact A3.

I have always liked CBN on linen for deburring, but PDP on leather deburrs without killing tooth.

.
you and i have talked PDP on and off for a few years, i have tried on leather and linen, but never fell in love with it. could be i never ended up with the best grit ......for demurring use: i have 16 down to 1, should i step up to maybe 80...45...30?? or CBN

[grepper]

Here you go, Mr. Max:

https://www.rshughes.com/p/3M-Cubitron-7...111_67951/

I've posted this link so many times now I think RS Hughes should start paying me a commission.

Hey Mr. Ken- What do you think of them?

[Ken S]

I am pleased with RS Hughes service. I ordered ten of the Cubitron 150 belts and a Scotch Brite fine belt. The package arrived in about a week. Although the packing job looked marginal, the contents arrived completely intact. I have not had a chance to use the belts.

Ken

[MaxtheKnife]

Here you go, Mr. Max:

https://www.rshughes.com/p/3M-Cubitron-7...111_67951/

I've posted this link so many times now I think RS Hughes should start paying me a commission.
.
i have a order pending now with hughes.....i will add a couple - thanks.....there texas store has stock on A160 trizacts - only place i have ever found them.....i have enough of those anyway

Hey Mr. Ken- What do you think of them?

[Ken S]

Mr. Grepper,

They look mighty pretty sitting in the box. Sorry, I have not had a chance to try them yet.

Ken

[grepper]

I love that burnt orange red color. They make any shop look cool.

They are very sharp when brand new, but settle down a little bit after a few blades. With half decent steel they produce a nice and sharp, toothy edge. For light duty work they seem to last and last.