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CoroMill® 745

Instructions

​Tip seat

The insert position is designed to make insert replacement and indexing quick and easy.
The heptagonal insert design and the position in the tip seat keep the inserts in the pocket when mounting the insert. Pre-setting is directed to support surfaces.

​Insert

Secure the insert position before tightening the screw. The cutting edges are numbered 1–14, making the insert easy to position.

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

​Pitch

Choose the M pitch in general applications.

The H pitch is suitable for high-productivity applications in stable conditions.

The MD pitch is first choice when machining vibration-sensitive components and in weak set-ups.

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​

Geometry Grade CoroMill 745 with 42° entering angle   CoroMill 745 with 25° entering angle
fz [feed/tooth] fz [hex value] fz [feed/tooth] fz [hex value]
Min Start Max Min Start Max Min Start Max Min Start Max
E-M30 GC1130 0.15 0.18 0.26 0.10 0.12 0.17 0.36 0.43 0.62 0.15 0.18 0.26
All grades except GC1130 0.15 0.21 0.30 0.10 0.14 0.20 0.36 0.51 0.73 0.15 0.22 0.31
 
E-M31 GC1130 0.15 0.18 0.26 0.10 0.12 0.17    
All grades except GC1130 0.15 0.21 0.30 0.10 0.14 0.20
 
E-M50 GC1130 0.18 0.25 0.36 0.12 0.17 0.24   0.38 0.50 0.71 0.16 0.21 0.30
All grades except GC1130 0.18 0.25 0.42 0.12 0.17 0.28 0.38 0.62 0.83 0.16 0.26 0.35
 
E-H50 All grades 0.21 0.30 0.45 0.14 0.20 0.30   0.40 0.73 0.90 0.17 0.31 0.38


CoroMill® 745 concepts – feed difference

ap mm, inch 
fz mm (inch)

CoroMill® 745 with 42° entering angle

CoroMill® 745 with 25° entering angle​​​​





First choice geometry and grade recommendations


Roughing

Medium

Finishing

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