FEATURING THE 4 1/2 x 1/2 x 7/8 GRINDING WHEEL – Type 27 – A24R
4 1/2x1/4x7/8, Grinding Wheel, T-27,
Resin Bond, A24R, Metal
• Our most popular wheel
• For general purpose
grinding
• Longer life for fewer wheel
changes
 |
| AA Abrasives – 40100 – Grinding Wheel |
A24R grain is designed for use on tougher
metals where consistent stock removal and wheel life is important. Grinding
wheels made with this grain have a longer life than other grinding wheels resulting
in fewer wheel changes.
What does it mean? A24R: A=Aluminum Oxide, 24=Grit (Coarse),
R=Medium Bond. See the Grinding Wheel Guide below.
Portable grinders with Type 27 depressed center
wheels are a favorite combination among the power tools users for metal fabricating. AA Abrasives – 40100 – Grinding Wheel – T-27 - A24R is recommended for
structural steel metal and welds and most other ferrous metals on grinders such
as Dynabrade 50303 or Metabo WE14-125VS.
Dynabrade 50303 Depressed Center Wheel Air Powered Grinder can be used for fast stock and weld removal-rust and scale removal and
heavy duty deburring with a 4 ½” Type 27 depressed center wheel like the AA
Abrasives 40100.
Metabo WE14-125VS Electronic Variable Speed Small Angle Grinder is an alternate grinder that can be used with a 4 ½” Type 27
depressed center wheel like the AA Abrasives 40100. The advantage to using a variable speed grinder is that when you switch from a grinding application to a surface finishing application you can lower the RPMs according to the product specifications. If you do not require a variable speed grinder, check out the Metabo W8-115 4 1/2" Angle Grinder.
GRINDING WHEEL GUIDE
The First series of letters indicates Grain Type;
A=Aluminum Oxide (Used in Metal Applications) C=Silicon Carbide (Used for
Masonry Applications) ZA= Alumina Zirconium used for (Stainless Steel and
Ferrous Metal Applications) TA=Ceramic Treated Aluminum Oxide (Used for Metal
Applications)
The Second series of letters indicates Grain Size
or Grit; 8-24=Coarse, 30-60=Medium, 70-180=Fine and 220-Up=Hard. The Third
series of letters indicates Bond Hardness; A-N=Soft, O-S=Medium and T-Z=Hard.
Wheel Types; Type 1=Flat Wheel for Cutting, Type
27=Depressed Center Wheel for Grinding and Cutting Applications, Type 28=Hat or Saucer Shaped for Grinding and Type 29=constructed with an upward angle built into the grinding section to provide full face contact for light stock removal and blending operations.
Type 28 and Type 29 wheels may only be used on the face and never on the periphery for cutting-off.
Type 28 and Type 29 wheels may only be used on the face and never on the periphery for cutting-off.
Note: Harder Wheels have a longer life where a
softer wheel will cut faster.
Fine Grain=Long Life=Slower Cutting and Grinding.
Coarse Grain=Short Life=Fast Cutting or Grinding.
