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CoroMill® 745

Multi-edge face milling cutter for best production economy

Instructions

Application tips

Maximum chip thickness

To maximize production efficiency, it is important to consider the hex value. Calculating cutting parameters according to the right hex value will ensure good cutting action with better surface quality and tool life.

Chip formation

Successful chip formation and chip evacuation is the key to high-quality milling operations. Learn more about how to form the perfect chips, and don’t forget the golden rule: Thick to thin.



Recommendations

Cutting data

​Feed per tooth, fz (mm/tooth, inch/tooth)
Insert geometry Starting value ​min. –max mm (inch)
​E-M30 ​0.20 mm (0.008 inch) ​0.10–0.30 mm (0.004–0.012 inch)
​E-M50 ​0.25 mm (0.010 inch) ​0.12–0.42 mm (0.005–0.017 inch)

Accuracy

Axial and radial run-out measured on tool body.

Diameter, mm (inch) ​Axial run-out ​ ​Radial run-out ​
​mm ​inch ​mm ​inch
​<125 mm (<5 inch) ​0.02 ​0.0008 ​0.02 ​0.008
​125 and160 mm (5 and 6 inch) ​0.025 ​0.001 ​0.3 ​0.0012
​200 mm (8 inch) ​0.030 ​0.0014 ​0.04 ​0.0008
​250 mm (10 inch) ​0.035 ​0.0014 ​0.04 ​0.0016
​>250 mm (>10 inch) ​0.04 ​0.0016 ​0.04 ​0.0016
​MD pitch: Same as diameter 100 above ​Will vary on different diameters due to radial compensation

Limits

Max. ap consistent machining: 5.2 mm (0.205 inch)

Max. ap temporary machining: 5.5 mm (0.216 inch).

Insert screw torque 12 Nm (106 in-lbs). Use a torque wrench.

First choice geometry and grade


 

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