Tech Corner: Bonded Abrasive Wheel Label Series Understanding “Wheel Dimensions”
This is the second in a series of articles on bonded abrasive wheel labels.
DIMENSIONS – By definition, the dimensions listed on the label of a bonded abrasive wheel represent the overall measurements of the wheel itself.
Using 6” x .045” x 7/8” as an example:
The first number [6”] represents the outside diameter of the wheel. This number will be fairly close to the actual outside diameter of the wheel as measured, but will not necessarily represent the measurement exactly. For example, one company’s 6” wheel may measure 151mm while another company’s 6” wheel may measure 148mm or 153mm. Yet they will all be marked as 6” on the wheel label.
The second number [.045”] represents the thickness of the wheel. The thickness dimension used on a bonded abrasive wheel label will typically be what the market refers to the wheel as. The wheel in this example would be referred to by the market as an “0.045 thin cutoff wheel.” The actual thicknesses may vary between 1.0mm and 1.5mm but these wheels will all be labeled as .045”, which equates to exactly 1.14mm. Another example of this is the ¼” thick grinding wheels. Actual measured thicknesses may range between 6.3mm and 7.0mm, yet these wheels will all be labeled as ¼” thick, which equates to exactly 6.35mm.
The third and final number in the example [7/8”] represents the arbor size. This is the only measurement that is a true representation of the actual size as measured as it is dictated by ANSI B 7.1-2000 “Safety Requirements for the Use, Care, and Protection of Abrasive Wheels”.
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