Turbine casing
Typically made from inconel or waspalloy, these most challenging of materials pose problems, not so much in the turning operations, but particularly with the amount of milling required in manufacturing this component and the large amounts of material to be removed.
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Rough milling
around a boss
For productive secure machining use CoroMill® 300 with a roll in programme combined with round inserts to reduce notch wear and allow high feed rates.
Read more about CoroMill 300
Animation:
 CoroMill 300 | |
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Helical ramping
a hole from solid
Helical ramping of larger diameter holes with CoroMill® 300 provides the most secure and productive method here.
The cutting forces are much lower than drilling, which also struggles with the interrupted exit into the bore. | |
Ramping down to 32mm hole diameter is possible and CoroMill 300 also comes with the advantage of Coromant Capto® coupling and through spindle coolant.
Read more about CoroMill 300
Animation:
 Helical ramping
For best results, we recommend you contact your representative to get this right from the start. |
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 | Dramatic productivity increase with ceramic turn milling
To be successful with this type of application careful process planning is required. Unlike the conventional optimized method with carbide, ceramic face milling runs at a speed of 1000m/min, removing the same amount of metal but 5 times faster.
For best results, follow the guidelines of our dedicated HRSA application guide.
Read more about our ceramic grades for HRSA
Video:
 Ceramic milling
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 | | Ceramic | Carbide |
| Application | | Conventional/up milling | Climb milling |
| Coolant | | Dry | Wet |
| Insert | | RNGN 120700 E 6060 | CM300-1204E-MM 2040 |
| Cutting speed | vc m/min | 1000 | 30 |
| Diameter | D3 mm | 63 | 63 |
| Spindle speed | rpm | 5052 | 152 |
| Feed rate | fz mm/tooth | 0.1 | 0.3 |
| Number of teeth | Zn | 4 | 6 |
| Depth of cut | ap mm | 1.5 | 2 |
| Radial immersion | ae mm | 35 | 35 |
| Metal removal rate | Q cm3/min | 106 | 19 |
| Tool life | TL mins | 4 | 25 |
| Total material removed | Qt cm3 | 424 | 477 |
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The complete modern
hole making solution
Drill with CoroDrill® 846
The latest development in solid carbide drill technology with geometry optimized for HRSA offers a high number of drilled holes with security and low axial cutting forces.
Secure drilling for thin walled components
Finish bore with Plura end mill
Circular interpolation is a fast and secure method, one tool can finish a wide range of hole diameters reducing tool inventory.
Read more about CoroMill® Plura end mills
Chamfer with Coromant Capto CoroTurn XS
This tool replaces inflexible special tools and can even be used for all de-burring and not just holes.
Video:
 Chamfering of holes with CoroTurn XS | |
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Finish profile milling - walls and bores
Utilise high speed machining techniques- shallow radial cuts and high axial cuts, for productive semi and finish milling. CoroMill® Plura with 50 degree helix in grade GC1620 is optimized for this application.
Read more about CoroMill® Plura
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Grade GC1105 – Designed for the challenge
of super alloy machining
GC1105 provides secure, reliable, quality machining, even flank wear and is truly versatile in all application areas.
- Reliability in intermediate stage machining through superior notch wear resistance in combination with good edge line toughness.
- Guaranteed accurate high quality performance in last stage machining provided by our razor sharp, ground inserts and our state of the art thin coating, with excellent adhesion.
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