My thoughts are.....
I've never had any problems with dry cheap properly stored blades kept in an air tight tin . Not so long ago I finished my stash of 50 x 4 inch slitting discs ( eBay buy ) that must have been 8 yrs old by the time the last ones were used since then I've used Screwfix and Lidl's with out any problem .
Let the wheel and tool weight do the cutting don't try and force them through the material there is no need for a death grip on the grinder ....none at all . . If cutting thin material there is a sweet spot that cuts better longer than theat any other angle to the surface .
Thinking of a lightly held 100 mm cutter it tends to be best cutting with the backs end an inch or so lower than the fixing nut rather than trying to cut it thin at 90 degrees to the surface .
When using thin blades switch on the grinder a second or so before you gently introduce the blade to the material .
When removing from the cut lift it away and let it slow to a stop before layinghe tool down in a safe place away from other tools so you don't stress a warm blade .
I've never had any problems with dry cheap properly stored blades kept in an air tight tin . Not so long ago I finished my stash of 50 x 4 inch slitting discs ( eBay buy ) that must have been 8 yrs old by the time the last ones were used since then I've used Screwfix and Lidl's with out any problem .
Let the wheel and tool weight do the cutting don't try and force them through the material there is no need for a death grip on the grinder ....none at all . . If cutting thin material there is a sweet spot that cuts better longer than theat any other angle to the surface .
Thinking of a lightly held 100 mm cutter it tends to be best cutting with the backs end an inch or so lower than the fixing nut rather than trying to cut it thin at 90 degrees to the surface .
When using thin blades switch on the grinder a second or so before you gently introduce the blade to the material .
When removing from the cut lift it away and let it slow to a stop before layinghe tool down in a safe place away from other tools so you don't stress a warm blade .





TG even offer the pferd ones cheaper!