Technology
Valve Body Model DH31-S / 48HRC MRBTNH345 / Long Taper Neck Ball End Mill
Work size: 50×50×50(mm)
(Cutting Depth: 30mm)
Material: DH31-S 48HRC
Cutting time: 10 hr 47 min
MRBTNH345 improved higher rigidity with taper neck design than existing long neck type.
Tool
MRBTNH345
•Higher rigidity brought by taper neck than existing long neck.
•MUGEN-COATING PREMIUM because of high heat resistance, realized long tool life for hardened steels.
•High effective machining achieved by NS original 3-flute design.
MHDH645R
•Realized stably long tool life against high hardened steels (48~65HRC).
•Corner radius to prevent flute chipping, and high helix angle for cutting sharpness.
MHDH645
•L/D=2 and L/D=3 length of cut selection.
•Realized stably long tool life against high hardened steels (48~65HRC).
•Improved milling deflection and accuracy by advanced flute design.
Cutting Condition
| Cutting process | Pre-roughing | Roughing | Semi-roughing | 1st Semi-finishing | 2nd Semi- finishing | Finishing | |
| Side | Bottom | ||||||
| Tool | MHDH645 φ6×18 |
MHDH645R φ6×R1×12 |
MRBTNH345 R1.5×1°×30 |
MRBTNH345 R1×1°×20 |
MRBTNH345 R1×1°×30 |
MRBTNH345 R1×1°×30 |
|
| Spindle speed (min-1) |
9,000 | 6,000 | 10,000 | 10,000 | 10,000 | 6,000 | |
| Feed （mm/min） |
3,000 | 3,000 | 1,600 | 1,000 | 1,000 | 800 | |
| Depth of cut ap×ae(mm) |
9×0.2 | 0.1×4 | ap0.1 | ap0.1 | ap0.05 | 0.15×0.05 | 0.05×0.1 |
| Stock (mm) |
0.2 | 0.2 | 0.2 | 0.05 | 0.05 | - | |
| Coolant | Oil mist | ||||||
| Cutting time | 35 min | 15 min | 1 hr 17 min | 2 hr 6 min | 3 hr 40 min | 2 hr 54 min | |
Comment
Stable milling quality on side and bottom surface has realized with taper neck design which is applicable for high efficient 3 dimensional milling and MUGEN-COATING PREMIUM for prolong tool life.