CGW 4-1/2" Calcium Coated FLAP DISC for Aluminum T27


Pack Size:
1 Disc
Angle Grinder
A/O for Aluminum
Was: $5.99
Now: $3.99

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Product Description

CGW A3 w/Calcium Stearate Coating T27 Flap Discs

The CGW 4.5” x 7/8” T27 A3 Flap Disc for Aluminum is a breakthrough in aluminum grinding technology. With premium Blue-fired Aluminum Oxide grains, calcium stearate coating, and heated treated polyester backing this disc will stay cool and prevent loading on softer materials. This disc works by the A3 Material with Calcium Stearate coating becoming liquefied as heat builds and in doing so drops the temperature on the material. If your next project will involve grinding aluminum, this flapper disc is your best choice!

Available Grits: 36, 60

Product Features:

  • Normally operated at a 0° to 15° angle
  • Grind more smoothly than angle discs
  • Less aggressive than angle disc
  • Best choice for flat surface work
  • Premium Blue fired AO grain with a polyester heat treated backing.
  • A3 Material with Calcium Stearate coating 

    liquefies under heat keeping the material cooler 

    and preventing loading with soft materials.


Works well on the following materials:

  • Soft metals such as aluminum and blending stainless steel.



  • Grinding, blending, finishing
  • Deburring
  • Deflashing
  • Edge chamfering
  • Polishing



  • Type 27 - Flat
  • Dimensions = 4.5”x 7/8”
  • Max RPM = 13300
  • Material = Aluminum Oxide Grains with a Calcium Stearate Coating
  • Grit = 36 & 60 Grits available

Reviews Write a Review

  • 3
    Test, just a test

    Posted by Matthewvomia on Oct 13th 2018

    Hello. And Bye.

  • 5
    great flappers for aluminum

    Posted by pauly on May 10th 2018

    these bad boys worked amazing

  • 5
    Best flap discs for grinding aluminum

    Posted by Gregory on May 2nd 2018

    Best flap discs for grinding aluminum

  • 5
    Excellent flap discs

    Posted by Mike Realay on Nov 11th 2017

    perfect for aluminum

  • 5
    Flappers for Aluminum

    Posted by Kozel on Jul 3rd 2017

    Best flap disc I've used for grinding aluminum