Technology

MRBSH330 Gear model

Even micro shape with small diameter also supports depth of cut and feed rate for high efficiency



Work material : YXR7(61.5HRC)
Work size : 50×50mm
Depth of cut : 10mm
Coolant : Oil Mist
Total machining time : 1hr45min

Tool

 

MRBSH330



●High-efficiency 3-flute ball end mill optimizes a shape of central edge and enables high    depth of cutting.
●Even hardened steel of 45 to 70HRC can be machining with long tool life and high    efficiency.
●R accuracy is ±0.005mm (R accuracy is based on a half value of actual diameter).
●Shank diameter tolerance , high accuracy type, is - 0.001 ~ - 0.003.


Cutting condition

                                              
Process Roughing Semi-finishing Finishing
ToolMRBSH330
R1×6
Spindle speed
(min-1)
20,000
Feed
(mm/min)
2,4002,4001,200
Depth of cut
ap×ae(mm)
0.225 × 0.3 pf:0.09 pf:0.05
Stock
(mm)
0.03 0.010
Time 57min12min36min

Result

【Accuracy】

 

Unit [mm]

Width Inclined angle
Target 37.073 30°45’
Actual 37.069 30°48’
Error -0.004 + 0° 3’


【Surface roughness】


           

Unit [μm]

Ra 0.26 0.41
Rz 1.75 3.69


【Tool wear】

   
Rake Peripheral cutting edgeCenterMachining time
MRBSH330
R1 × 6
Roughing
57min
MRBSH330
R1 × 6
Finishing
36min