How to select safe abrasive cutting discs?

[Noyade]

Anyone ever done this?

I'm tone deaf - this is from a 9" grinder/cutter manual from 1999.

I can't imagine Bunnings staff approving of me tapping their discs with a wooden mallet.

Thing of the past with better manufacturing standards?

Cheers.

[MitchellMc]

There is no need to tap the discs constructed with current technology @Noyade. 

Here's a helpful pre-use checklist from SafeWork SA.

Before using an angle grinder, ensure that:

• the guard and handles are secure

• there are no defects or damage to the disc (a disc which has been dropped may have developed cracks and should not be used)

• the correct flange and locking nut is in place for the type of disc being used (otherwise the disc can shatter at high speed)

• the tightening tool supplied by the grinder manufacturer is used to tighten the disc as other methods can damage the disc and grinder

• the correct disc diameter and central disc hole size for the spindle is used

• the correct type of disc is used for example grinding discs for grinding and cutting discs for cutting

• the correct type of disc is used for the material being cut or ground. 

Mitchell

[Noyade]

Thanks.

The background is the blade style below. 'Discovered' them recently - 230mm diameter with a 35mm arbor.

I'm thinking 40 years old?

They do not 'ring' - 😁

Cheers.

[MitchellMc]

That watermark alone would be a reason to dispose of them, @Noyade. They are much too old for my liking; I'd get rid of them to ensure you don't mistake them for new blades.

Mitchell

[Noyade]

Cheers Mitch. @MitchellMc