CoroDrill® 870
CoroDrill® 870 exchangeable-tip drill saves time, increases productivity, and reduces cost per hole. Tailored to suit your needs, CoroDrill® 870 is designed to optimize applications through diameter range, steps and length possibilities for the H9-H10 hole tolerance area.
Customer case
| Component: | Shaft G1 T1XX |
| Material: | K2.1.C.UT |
| Operation: | Drilling 15.4 |
| Machine: | Mazak GBT-1002945 |
The customer wanted to improve the process in place and reduce cost per component. The customer also needed to increase process security because tool life and hole dimensions were not controlled.
+70%
Productivity increase
| Competitor | Sandvik Coromant | |
| Tool | - | 870-1500-15L20-3 |
| Insert | - | 870-1540-15-PM 4334 |
| vc m/min (ft/min) | 58 (190) | 90 (295) |
| n, rpm | 1200 | 1860 |
| vf, mm/min (in/min) | 395 (15.5) | 670 (26.4) |
| fn, mm (inch) | 0.33 (0.013) | 0.36 (0.014) |
| Tool life, minutes | 138 | 163 |
| Tool life, pcs | 350 | 700 |
| Result | CoroDrill® 870 improved the current process because it doubled tool life and works with higher cutting conditions than the competitor. |
Customer case
| Component: | Ring |
| Material: | P2.1.Z.AN |
| Operation: | Drilling 16.5 |
| Machine: | Mazak |
69%
Reduced cycle time
+219%
Productivity increase
| Competitor | Sandvik Coromant | |
| Tool | Two different tools | TM870.3.2-748892 |
| Insert | - | 870-1650-16-PM 4334 |
| vc m/min (ft/min) | 90 (295) | 105 (344) |
| n, rpm | 1736 | 2025 |
| vf, mm/min (in/min) | 260 (10.2) | 445 (17.5) |
| fn, mm (inch) | 0.15 (0.006) | 0.22 (0.009) |
| Tool life, minutes | 234 | 98 |
| Tool life, pcs | 39 | 28 |
| Result | When the customer changed to a double-step Tailor Made CoroDrill® 870 instead of using two different tools, they reduced cycle time by 69% and increased productivity by 219%. |
Customer case
| Component: | Light and standard cranks |
| Material: | CMC 01.2 |
| Operation: | Drilling |
| Machine: | Okuma NH401 Horizontal machining center |
+124%
Productivity increase
| CoroDrill® 870 | CoroDrill® 870 Tailor Made | |
| Tool | 870-1700-17-LX075-3 | TM870.2.2-734918 Drill and Chamfer |
| Insert | 870-1700-17-PM 4234 | 870-1700-17-PM 4334 |
| vc m/min (ft/min) | 120 (394) | 152 (499) |
| n, rpm | 2250 | 2850 |
| vf, mm/min (in/min) | 686 (27) | 723 (28.5) |
| fn, mm (inch) | 0.305 (0.012) | 0.254 (0.010) |
| Depth of cut, mm (inch) | 25.4 (1.00) | 25.4 (1.00) |
| Tool life, minutes | 633.6 | 320 |
| Cycle time per component, minutes | 0.99 | 0.5 |
| Number of components | 640 (predetermined number of components) | 640 (predetermined number of components) |
| Result | When the customer changed to a step and chamfer Tailor Made CoroDrill® 870, they saw a large increase in productivity and also saved on set-up time and cost per component. |
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