FEC AFC1200 - Manual (Page 8)

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P Plate must be blanchard ground (to ensure sides are adequately flat and parallel)
to a thickness of 15.88 mm (.625 inch)
.05 mm (.002 inch).
P Both sides of all bores must be chamfered 1.6 mm (.063 inch) x 45 degrees.
P Tools must be mounted 1.6 mm (.063 inch) apart, at a minimum
Chapter 4: System Setup and Wiring