Aluminium workpiece grinding wheel speed in what range is more appropriate?

【China Aluminum Network】 The rotation speed of the grinding wheel is related to the diameter of the grinding wheel. The proper rotation speed is shown in the table.

Polished Aluminum Substrate Allows White Button Grinding Wheel Speed

Wheel diameter/mm

200

250

300

350

400

Allowable rotation speed/r·min-1

1900

1530

1260

1090

960