Belt Sander/Linisher Sharpening

**iron bark** · 2nd March 2007, 06:34 PM

I have just about completed Derek's model

of a belt sander sharpening system - went looking for fine grade belts and was recommended to All Abrasives in Maroochydore.

He stocks 3M TRYZACT belts, and having bought one I can thoroughly recommend them - mine (a No. 30) cuts at about the rate of a 150 and gives a finish equivalent to 600 - not cheap at $17, but he reckons they outlast ordinary belts by about 10 times - there are finer grades available

Looking at Dereks setup in best of best, it looks like he is using one on his machine

In a word (or two), BLOODY FANTASTIC

My tools have never been so sharp

Cheers,

Ned

**derekcohen** · 3rd March 2007, 08:46 PM

Hi Ned

We need pictures!

And, yes, my belts are indeed 3M Tryzact. I have up to 1300 grit. I know a 2000 grit is available. Now THAT would be awesome!

I tend mostly to go up to 240, then use stones with microbevels.

Regards from Perth

Derek

**David L** · 3rd March 2007, 09:21 PM

Hi Ned I called in there my self last week for some supplies and got the same recommendation I am looking forward to making my jig and trying one.

**iron bark** · 4th March 2007, 08:48 AM

David, you won't be disappointed, let me assure you

Derek, I'll post some pictures when I have finished a couple of mods I need to do

I am also working on a thicknesser blade sharpening attachment after a bad experience with professional sharpening - (see earlier posts)

It looks a bit like something from Heath Robinson at the moment, and may be just as impractical, - but, I like a challenge

(Edit) Whilst reading some of your earlier posts (back in '04) you said that the tools actually don't feel as sharp to the touch, but work better - I have found this as well, I thought I had stuffed up the sharpening, but put it in the tool and it was cutting beautifully - I wonder if it because the fingers feel the rougher edges and translate that to sharp

Cheers,

Ned

**derekcohen** · 4th March 2007, 01:09 PM

Whilst reading some of your earlier posts (back in '04) you said that the tools actually don't feel as sharp to the touch, but work better - I have found this as well, I thought I had stuffed up the sharpening, but put it in the tool and it was cutting beautifully - I wonder if it because the fingers feel the rougher edges and translate that to sharp

Ned

That is spot on.

When we use words like "sharp" we are really describing the ease of cutting. In actual fact it is the ease with which a blade penetrates the wood. This is facilitated by the (a) acuteness of the angle - which is why a low bevel angle feels "sharper" than a high cutting angle, and (b) like aerodynamics, the smoothness of the blades' surface. You can indeed feel the difference between, say, a 1200 waterstone and a 6000 waterstone. You can see it also in the scratches (serrations) on the surface of the steel.

Fingertips are excellent tools too.

Regards from Perth

Derek

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