Grinding wheel number

grinding wheel number

grinding wheel type

The type of the wheel is marked as an ISO number and signifies the wheel’s shape. For example, ISO Type 52 is a spindle-mounted wheel.

The size of the grinding wheel is marked as dimensions in mm. For example, 100x6x16mm. This

represents the wheel’s diameter x thickness x hole size

.grinder wheel

The specification of the grinding wheel is marked as a series of letters and numbers. For example, WA 60 K 7 V. This represents the type of abrasive material, the grit size, the grade, the structure, and the bond type. A general guide to specification marking can be seen in the table here:

[wptb id=871]

The range of material markings, grit sizes, grades, structures and bonds depends on the product and the manufacturer, but the table above gives a general outline of common markings seen on abrasive wheels.

The maximum operating speed grinding wheel

is marked on every large grinding wheel (above 80mm in diameter) in two ways:

  1. The peripheral surface speed, given in metres per second. For example, 80m/s.
  2. The rotational speed, given in revolutions per minute. For example, 8500rpm.

For smaller grinding wheels (below 80mm in diameter), the maximum operating speed is provided on a separate notice which must be stored alongside the wheel.

For high speeds, colour-coded stripes are also marked across the centre of the wheel. The colours are:

  • 50m/s – Blue
  • 60m/s – Yellow
  • 80m/s – Red
  • 100m/s – Green
  • 125m/s – Blue/Yellow

The restrictions for use are marked on the grinding wheel using a code and, in some cases, a corresponding graphic. The markings used to show restrictions are as follows:

[wptb id=878]

  • The manufacturer’s trademark/name.
  • The test record number, indicates it meets the standards for safety.
  • The expiry date if it’s an organic bonded wheel (this will be 3 years from the date of manufacture).
  • A traceable code number, indicates the source and manufacturing details of the wheel.
  • A mounting arrow, indicating the heaviest point of the wheel. The arrow should point downwards when the wheel is mounted.

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