Technology

Precise Milling Model
SSR200 / CBN Super Speed Radius End Mill
PD613 / 60HRC

Work size: 30×30(mm)

Material: PD613 60HRC
Cutting time: 7 hr 57 min (only finishing)

Even with very small diameter in Φ 0.2, CBN end mill realize providing stable surface quality and high accuracy for long time milling on high hard materials.

Tool

SSR200
Φ0.2×R0.02×0.5 · Φ0.2×R0.02×1


•Realized high efficient machining with radius flute along with excellent wear resistance of CBN.
•Realized excellent surface roughness by introducing smooth tangent on all over flute.
•Applicable for work materials from tempered steel to hardened steel (up to 68HRC).
•Lineup expansion from Dia.0.1 mm. 172sizes in total.

Cutting Condtions

Slot part

Cutting process Slotting
to Z-0.03
Slotting
to Z-0.5
Tool SSR200 Φ0.2×R0.02×0.5
Spindle speed
(min-1)
40,000
Feed
(mm/min)
100 300
Depth of cut
ap×ae(mm)
ap0.001 ap0.003
Coolant Oil mist
Cutting time 1 hr 8 min 2 hr 19 min

NS logo part

Cutting process Side finishing Bottom finishing
Tool SSR200 Φ0.2×R0.02×0.5
Spindle speed
(min-1)
40,000
Feed
(mm/min)
300
Depth of cut
ap×ae(mm)
0.001×0.005 0.005×0.005
Coolant Oil mist
Cutting time
(2D per hole)
1 hr 55 min 20 min

Gear part

Cutting process Side finishing Bottom finishing
Tool/font> SSR200 Φ0.2×R0.02×1
Spindle speed
(min-1)
40,000
Feed
(mm/min)
200
Depth of cut
ap×ae(mm)
0.003×0.005 0.005×0.005
Coolant Oil mist
Cutting time 1 hr 45 min 30 min

Comment

Finished with only 1 end mill from slot part to letter part.

Slot size: W0.21 mm× D0.5 mm× L5 mm
Small cutting pitch condition on initial milling to realize stable machining accuracy to 0.5mm depth.
36 grooves by 1 end mill.


Magnified photo of NS logo part.
As shown in the figure, target tolerance was +0.001 mm.


Outer periphery of gear was tolerance -0.004 mm to the target and bottom surface roughness was Rz 0.25 μm.