Tile Cutter Now Leaving Jagged Edges

[perky416]

Hi Guys,
First time tiler here part way through tiling my bathroom. I purchased a Sigma Series 3 Max tile cutter which at first made an amazing cut, it was almost perfect, however after about 20 cuts i am now getting jagged edges on my tiles and chips every so often. Unless a chip occurs the finished edge of the tile is pretty good, its the material that sits behind the finish that isnt clean and protrudes the cut edge by a couple of mm.
The tiles im using are the Kamber 600mm x 300mm, 9mm thick from Topps Tiles, they are porcelain with a polished gloss finish.

Is this normal?
Should I buy a new blade or just crack on with it? Im just concerned that it will affect the separation at the edges.

All help appreciated.

 

[Simon Dale]

Do you oil your wheel ?

 

[perky416]

No I didnt realise i had to. What would you recommend? Do you think i should i buy a new wheel and make sure i oil it?
Thanks.

 

[Simon Dale]

Glass cutting oil had my wheel for 2 years still good. You can use a grinder to cut off the back of tile that protrudes.

 

[Brian the Tile]

Only score once don't keep going over it

 

[LM]

Have you any pics of the offending edges?

 

[Flintstone]

Don’t use too much pressure when scoring, that can add to the chipping

 

[One Day]

Polished gloss (glaze?) on porcelain?
They'll need a light score - one only.
Some types of these tiles are simply impossible to get a very clean cut on.
Experiment with different pressures and you'll find the best one.

 

[Blunt Tool]

After you put the tile into cutter check you have the bar at the proper height as it does move slightly thru the day as you use. If it is set up correctly usually find it cuts sublime. I learnt by my mistakes.

 

[Paul James Farrell]

I was told that you should use the 10mm diameter wheel, instead of the 6mm. Heavy score, then snap the tile with a kind of chopping action.