Herbert Prematic Die Head Operator's Manual
Herbert "Prematic" Diehead Stationary and Rotating Models with Parts as Component Pictures. Detailed Operator's Instruction Manual with dismantling procedures, pre-setting instructions, chaser setting charts, diameter settings, helix angles and chaser holders, helix angle charts, lead and rake angles, cutting speeds, reliefs and undercuts, regrinding tangential chasers, faults and remedies, etc.