Grinding Discs

[brizospark]

Which 115 mm grinding discs are best for cutting metal? i.e. tray etc.

I hear the bosch ones are pretty good?

 

[netblindpaul]

Buy the 1mm thick ones they are much better than the 2-3mm thick cutting discs.
Brand names tend to last longer, but, not that much.
Are you really cutting that much tray with a 115mm grinder for it to make a difference?
If so you really should look at a metal chop saw like say an Evolution, this though has around a 2-3mm kerf.

 

[johnboy6083]

I would agree with Paul regarding the 1mm or 0.8mm discs, but I wouldn't use a chopsaw for tray. In fact, its dangerous, as it catches on the lip, and can suddenly move the free end of the tray. I would always use a grinder. I keep one on my van and its very quick and easy, providing your careful. Always wear a face visor, or proper goggles, not just glasses.

 

[brizospark]

can you buy 1mm diamond discs?

 

[netblindpaul]

You should not use diamond for ferrous materials.
johnboy,
A cop saw on tray is fine if you use the correct machine & blade, there is no risk of catching.
Please trust me on that one I have the T shirt!
I have done an AWFUL lot of work with cutting machines saws etc and it is more than feasible.
In small quantities though I agree grinder every time, the chop saw has the advantage of built in angle cuts.
However, your H&S advise is SPOT ON!
Trouble is for those of us who wear glasses goggles are a nightmare and visors not much better.
It's a pain!

 

[PC Electrics]

You shouldn't be using grinding discs for cutting - use a cutting disc (the clue is in the name!). There are quite a few brand names, but certainly Bosch, Makita, Norton are good.

Good metal cutting blades are available for chop saws. Obviously never try to cut metal with a toothed blade!

 

[HandySparks]

You shouldn't be using grinding discs for cutting - use a cutting disc (the clue is in the name!). There are quite a few brand names, but certainly Bosch, Makita, Norton are good.

Good metal cutting blades are available for chop saws. Obviously never try to cut metal with a toothed blade!

I quite agree with your remark about cutting discs, but why not a toothed blade? Here's one of many:
Home - Products - Powertools - Metalworking - Chop Saws - TCT metal chopsaw - DEWALT

Maybe not the tool for thin sheet metal but just the job for thicker stuff and quieter than an abrasive disc machine.

 

[netblindpaul]

PC,
There are many toothed blades for chop saws suitable for metals, including tct tipped types and they are very successful, in fact very very successful and that is without considering the hss cold cut saws.
Toothed saw metal cutting is very effective, cheap and efficient mate.