Angle Grinder - Difference between Type 1 and Type 27 wheels??

[keithdigital]

I have a Dewalt D28402 Angle Grinder.  It comes with a Type 27 Guard and a Type 27 Grinding Wheel.  I also purchased a Type 27 cut-off wheel for it.    I noticed in the manual it says you can purchase a Type 1 Guard for use with Type 1 wheels.  My question is - what is the point?  Is there a benefit to Type 1 over Type 27 wheels?  Thanks.

[kanxrus]

Type 1 wheels are designed for cutting. Type 27 wheels are made for blending in, and grinding corners and flat surfaces.

Being that type 27 wheels have depressed centers, you need a deeper guard. If you use a type 27 guard and a type 1 wheel, you run the risk of greater exposure to harm in the event the wheel shatters.

Can you use Type 1 wheels with a type 27 guard.... sure.

So the next question would be. Where do I get this wheel?

You can order it directly from Dewaltservicenet.com or a number of online replacement part dealers.

Part number is 643772-00.

[keithdigital]

I have a Type 27 cutting wheel though.

I have also seen Type 1 wheels for grinding.

This is why I am confused.

[kanxrus]

Type 1 is for grinding, type 1a is for cutting.

Type 27 is for grinding, type 27a if for cutting.

Same rule applies, use the larger guard for the Type 27 wheels (Or depressed wheels) Use the smaller guard for type 1 wheels.