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31 March 2015

Tool Review Tuesday, 06: Grizzly 8-piece Single Cut, 1/4" Shank Carbide Burr Set

 What is it?

Grizzly's 8 Piece Single Cut Carbide Burr set, for NON-FERROUS metals, mostly aluminum.


 Product website:

Not sold on Grizzly, similar sets available all over.


What does it do?

Grinds aluminum quickly and with a good finish, without clogging up the flutes of the burr.

Notable Observances: 
You MUST use single cut burrs for aluminum. Look at the large flutes:

The large, wide flutes evacuate the large chips easily and also allow for a better finish. Using a double cut burr on aluminum will just gum it up, heat it up, and end up pissing you off.

Using lube helps. Beeswax if you have it, WD40 if you don't.

These are 1/4" shank burrs. Wimpy 1/8" shank burrs and tools need not apply for efficient material removal. Dremels suck. Buy a used hanging motor flex shaft grinder. You will thank me later.

The eight piece set (the on is on my grinder on standby, so, you don't get to see that one) has a comprehensive amount of shapes:
The shanks could be longer, but then you would have to pay a LOT more. Overall, this is a very balanced set. 

Here is a blog post about porting Honda oil pumps using this very set:

Pros:
-Was inexpensive
-VERY efficient material removal with minimal clogging and excellent surface finish
-This set runs well and is pretty true

Cons:
-Grizzly only carries wimpy 1/8" burrs now

Is it BBA (Beaver Built Approved)?

Yes. If you have a grinder that can use 1/4" shank burrs effectively (it needs torque, not silly 35kRPM speed), these will make porting oil pumps or bulk material in aluminum heads easy, controllable and inexpensive.