Making a 50m x 115mm length of paper 50m x 103mm quickly and accurately?

[Agroshield]

A guillotine-like cutting action with the grit 'downwards' would give longer cutting edge life than a rotary cutter or a slicing action with a vertical blade. The guillotine is shearing the sheet.

The disadvantage of grit downwards is that it will wear the platen of the machine.

Guillotine or shear blades are easy to sharpen or touch up in situ, especially if straight. You can tune the bevel to suit the cutting conditions. You can also easily adjust clearance between the two blades.

In the metalworking world, you can buy throatless shears (Beverley is one brand) that do not have a length limitation. I saw a picture of an electric throatless shear that might work.

Off the wall idea: laser cutter.

Also, see what is available in the bandsaw world. There are many, many different types of bandsaw blades made other than the standard ones with teeth on one edge. A very fine toothed, PCD-coated or toothless (pure abrasive) blade might work. Fence is already there for alignment. Motorised roller to feed the work (like you see on jointers or spindle moulders).

Perhaps give Abracs or Midland Abrasives a call or the guy on eBay who sells the abrasives and ask them how they cut sheets or rolls. If you sent them five or ten rolls, they might do it for you.

 

[mtt.tr]

Is it on a roll?

I'd try a very fine bandsaw

 

[123hotchef]

saw or kitchen knife gets my vote

 

[awemawson]

Simple vertical blade in a frame with guides and pull the sand paper though by hand. Don't over complicate it.

 

[julianf]

Simple vertical blade in a frame with guides and pull the sand paper though by hand. Don't over complicate it.

I dont think that will work - i think ill get a ragged edge, or it will start to tear, or go off line. The paper is tougher than standard paper, which is why i use it. I can buy weak paper in 103mm rolls, but its no good.

The frame and blade is my preferred idea of the moment, as im not sure a guilotine will be a whole load better than doing it by hand - i mean it will be quicker, but just as tedious.

I think the frame idea is good, but i think it will, somehow, need to be a powered blade, be it hand powered stanley in a jig, or rotating, or bandsaw. Ideally electric, so i can just, as you say, pull the whole roll through in one go.



Im wondering how long those thin ceramic dremel discs would hold up.

 

[123hotchef]

I dont think that will work - i think ill get a ragged edge, or it will start to tear, or go off line. The paper is tougher than standard paper, which is why i use it. I can buy weak paper in 103mm rolls, but its no good.

The frame and blade is my preferred idea of the moment, as im not sure a guilotine will be a whole load better than doing it by hand - i mean it will be quicker, but just as tedious.

I think the frame idea is good, but i think it will, somehow, need to be a powered blade, be it hand powered stanley in a jig, or rotating, or bandsaw. Ideally electric, so i can just, as you say, pull the whole roll through in one go.



Im wondering how long those thin ceramic dremel discs would hold up.

try the angle grinder with a 1mm or 0.8mm disc

 

[no idea]

When I had this issue I ended up relocating one of the sandpaper holding clips on the drum to allow me to use full size (115mm) strips. Post a couple of picture of the drum to see if this is viable.

 

[MCKDAVID]

Cough.

Buy another sander.

Cough

^^exactly this, not worth the grief. Life's too short to be working round a permanent problem all the time. If it was a one off or seldom needed, then aye, but regularly, no way. Flog it on to someone else, and buy one of the easily available size would be the way I'd go.

 

[julianf]

This is the sander -

Axminster Trade AT635DS Dual Drum Sander

This is a twin drum finishing sander intended for small workshops where the finishing of boards, panels and frames is regularly carried out. Made from sheet steel with cast iron frames supporting the conveyor table, this sander has a compact footprint....

www.axminstertools.com

(its not a £100 replaceable tool)

 

[Gareth J]

try the angle grinder with a 1mm or 0.8mm disc

Seems like a decent idea. What about doing it when it's rolled up? Carefully.

 

[Parm]

This is now just plain confusing and mind boggling.

How does 12mm make a difference in a sander like that ?

Clearly there is something that i dont understand

 

[ukracer]

A paper slitting machine will be your friend, but by the time you’ve got one of those it will be cheaper to buy sand paper from the states

Are they not around 30k?

 

[ukracer]

I dont think that will work - i think ill get a ragged edge, or it will start to tear, or go off line. The paper is tougher than standard paper, which is why i use it. I can buy weak paper in 103mm rolls, but its no good.

The frame and blade is my preferred idea of the moment, as im not sure a guilotine will be a whole load better than doing it by hand - i mean it will be quicker, but just as tedious.

I think the frame idea is good, but i think it will, somehow, need to be a powered blade, be it hand powered stanley in a jig, or rotating, or bandsaw. Ideally electric, so i can just, as you say, pull the whole roll through in one go.



Im wondering how long those thin ceramic dremel discs would hold up.

What about a saw bench with very fine blade. Paper roll held in place by a wooden board.

 

[Parm]

Are they not around 30k?

I dont know exact costs but they will be expensive, hence why i said it will be cheaper to buy the paper in the correct size.

Ive had a quick blast around the internet this morning. 103 mm paper is available but it seems to be quite expensive, so i guess the OP is looking at saving some money by cutting down 115mm wide rolls.

 

[ukracer]

I dont know exact costs but they will be expensive, hence why i said it will be cheaper to buy the paper in the correct size.

Ive had a quick blast around the internet this morning. 103 mm paper is available but it seems to be quite expensive, so i guess the OP is looking at saving some money by cutting down 115mm wide rolls.

I only commented as a cheap slitting machine would be great for me.

 

[awemawson]

Are the sanding bands actually paper, or are they in fact cloth based? If the later they can be torn up the warp across the weft.

 

[ukracer]

Yes. You'd use a tape cutting machine like the one I've got sat in my yard

Got a photo Brad?

 

[Parm]

I only commented as a cheap slitting machine would be great for me.

Why do you need a cheap slitting machine?

production and supply of 103mm sand paper? Lol

 

[julianf]

When I had this issue I ended up relocating one of the sandpaper holding clips on the drum to allow me to use full size (115mm) strips. Post a couple of picture of the drum to see if this is viable.

Yep, this is a plan also.

The drum are slotted at the ends, so i would need to cut a new slot in the right place, and then move the sprung clamping stuff.

The clamping stuff holds on the internal drum "webbing" so it would depend on if there was a web in (close to) the right place. As the clamps are sprung off the web, it wouldnt need to be so exact, but the slot would need to be in the right place.