It is required to face mill a medium cast iron block (BHN 200) to size it down from 1.1 to 1.0 thick (in a single pass of the tool) using a 5 diameter 32-toothed carbide cutting tool. The block is 4.0 wide and 8 long. Only 10% of the tool diameter engages the workpiece at once. Use data tables from the lecture power points. Take "pi" = 3.14. Determine the recommended spindle speed in revolutions per minute. Round to the nearest unit