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CoroMill® 745
Multi-edge face milling cutter for best production economy
CoroMill® 745 high feed cutter with a 25° entering angle
Roughing and semi-finishing of machine bed in one operation
| Component: | Machine bed |
| Material: | CMC ST52, 165 HB, casted |
| Operation: | Roughing and semi-finishing |
| Machine: | ISO-50 Gantry milling machine |
No finishing tool needed
-40%
Cycle time / component
| CoroMill® 745 with a 25° entering angle | Competitor | |
| Tool | 725-125Q40-21H | Dia. 125 mm |
| Insert | 745R-2109E-M30 4230 | |
| zn | 14 | 7 |
| n, rpm | 560 | 680 |
| vc, m/min (ft/min) | 220 (722) | 267 (876) |
| vf, mm/min (in/min) | 6666 (262.4) | 3237 (127.4) |
| fz mm/z (in/z) | 0.85 (0.033) | 0.68 (0.027) |
| fn, mm/rev (in/rev) | 11.9 (0.469) | 4.76 (0.187) |
| ap mm (inch) | 1.5 (0.059) | 1.5 (0.059) |
| Cycle time per component (min) | 27 | 45 |
| Pieces per assembly | >2 | 2.43 |
| Surface finish | While the competitor needs to carry out an additional finishing operation, CoroMill® 745 can perform the complete operation in one step with no need for the surface to be finished. |
CoroMill® 745 with a 42° entering angle
Superior surface quality with the E-M31 geometry
| Component: | Front support |
| Material: | Nodular cast iron, GJS500, CMC 09.2 |
| Operation: | Roughing and finishing |
| Machine: | Mazak FH 880, ISO 50 |
21%
Time savings
| CoroMill® 745 with a 42° entering angle | Competitor | |
| Tool | 745-125Q40-21H | Dia. 125 mm |
| Insert | 745R2109E-M31 | 14 edges |
| Grade | K20D | |
| Cutting data | Roughing to finishing | Roughing to finishing |
| zn | 14 | 12 |
| vc, m/min (ft/min) | 259 (850) | 259 (850) |
| vf, mm/min (in/min) | 2306–1384 (90.8–54.5) | 1898–1186 (74.7–46.7) |
| fz mm/z (in/z) | 0.25–0.15 (0.010–0.006) | 0.24–0.15 (0.009–0.006) |
| ap mm (inch) | 4.5–2.5 (0.177–0.098) | 4.5–2.5 (0.177–0.098) |
| Cycle time per component (min) | 3 min. 5 sec. | 3 min. 50 sec. |
| Result: | After 100 minutes machining time, the M31-K20D geometry has generated a very good surface quality, significantly better than the competitor. The customer also commented on the good sound and cutting action. |
Consistent and reliable heavy rough face milling of axle arm
CoroMill 745 gave a consistent, reliable performance. The customer appreciated the positive cutting action, which provided a good sound and very good chip flow. The clamping felt very secure with the large screw.
+220%
Increased tool life
| Component | Axle arm on tractor | |
| Operation | Heavy rough face milling with variable depth of cut directly on casting surface | |
| Workpiece material | SG Iron CMC 9.1 | |
| Tool | 745-080Q27-21H | |
| Insert | 745R-2109E-M30 K20D | |
| CoroMill® 745 with a 42° entering angle | Competitor tool | |
| Diameter | 80 | 80 |
| zn | 9 | 7 |
| n rpm (rev/min) | 764 | 954 |
| vc m/min (ft/min) | 240 (787) | 240 (787) |
| vf mm/min (in/min) | 1513 (60) | 1404 (55) |
| fz mm/z (in/z) | 0.22 (0.009) | 0.21 (0.008) |
| ap mm (inch) | 4.5 (0.177) | 2.5 (0.1) |
| Results | ||
| Tool life | 80 comp/edge (80 min) | 25 comp/edge (25 min) |
Heavy rough face milling of gear box housing
CoroMill 745 made an excellent overall performance. The noise and vibration was significantly reduced, and the chip flow was very good. Tool life increased by 60%.
+60%
Increased tool life
| Component | Gear box housing on tractor | |
| Operation | Heavy rough face milling with variable depth of cut directly on casting surface | |
| Workpiece material | GCI (GG30) CMC 8.2 | |
| Tool | 745-125Q40-21H | |
| Insert | 745R-2109E-M30 K20D | |
| CoroMill® 745 with a 42° entering angle | Competitor tool | |
| zn | 14 | 12 |
| n, rpm (rev/min) | 637 | 637 |
| vc, m/min (ft/min) | 250 (820) | 250 (820) |
| vf, mm/min (in/min) | 2289 (90) | 2289 (90) |
| fz mm/z (in/z) | 0.26 (0.010) | 0.26 (0.010) |
| ap mm (inch) | 3 (0.118) | 3 (0.118) |
| Cycle time (min/component) | 8 min. 21 sec. | 8 min. 21 sec. |
| Results | ||
| Tool life | 8 comp/edge (64 min) | 5 comp/edge (45 min) |
