Diameter: 25mm

Width: 25mm

Bore or hole size: 10mm

Shape: Type 5 Recessed one side 12 x 13mm

Specification: 454A 80 IV Ceramic abrasive. Application: Internal grinding of difficult to grind or hard tool steels.

Maximum RPM: 33420

Because the workpiece is 'wrapped around' the wheel instead of going away from it internal grinding results in a larger contact area than in external cylindrical grinding. In general, this requires softer grade wheels to be used. The geometric relationship between the workpiece and the wheel can also restrict the flow of grinding fluid into the grinding zone and care should be taken in coolant application. As a general rule the wheel diameter should be approximately 75% of the diameter of the hole being ground. To avoid 'bellmouthing' of the component, only one-third of the wheel width should be allowed to pass out of each end of the hole being ground. 

• For your safety all Norton, Flexovit, Klingspor, Dronco, Tyrolit and Abracs grinding and cutting wheels conform to the 'Organisation for the Safety of Abrasives'. This requires members to manufacture and document abrasive products to the highest safety standards.
• You should ensure that you are fully informed on the safe operation of abrasive cutting and grinding wheels. More on training in the use of cutting and grinding wheels........
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