CBN End Mill

The most suitable end mills for long-hour finishing process of high hard materials. End mills made of CBN sintered compact with hardness one rank below of diamonds as a raw material for tools.

What is CBN Sintered Alloy?

ダイヤモンド 硬さ:Hv8,000〜10,000、CBN焼結体 硬さ:約Hv4,500、超硬合金 硬さ:Hv1,300〜1,800、ハイス 硬さ:Hv800〜900

CBN (Cubic Boron Nitride) sintered alloy is second hardest material next to diamond as left figure, 3 times harder than Tungsten carbide, moreover having features of strong heat-resistance and high thermal conductivity. However, less tough characteristic of CBN often causes chipping of tool edge easily. Accordingly, CBN is recommended for finishing of hard materials with less cutting load on the tool edge, which guarantees extra-long tool life.

Rich Lineup, Suitable to Various Machining

End mills of the next generation realized by developing a unique tool shape utilizing the characteristics of the CBN sintered compact with high hardness and thermal resistance and establishing grinding technology. Long life and stable finished surface are provided in finishing process of high hard materials.

Introduction of new size additional product

Released in June ,2021

CBN Super High Precision Radius End Mill

Tool profile: Radius ( 4 Fluts )

Material: Cubic Boron Nitride

Size: φ0.1~3 Total 109 sizes

・New tool design has been developed to reduce the cutting resistance
 and upgrade the finishing accuracy!
・Achieved higher efficient machining and more stable tool life in micro machining!
・The shank diameter accuracy is 2μm (-0.001 ~ -0.003).
・Supports shrink fit holders and realizes high precision machining performance.

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●Machining accuracy is determined by tool.

●New tool design for reducing cutting resistance

Succeeded in reducing cutting resistance. Upgraded machining accuracy!

●Comparison to other brand

Optimized cutting edge shape enables micro finishing
for a long time and high accuracy machining

STAVAX 52HRC Micro needle

Work size:15 × 15 mm
    (Depth 1.2 mm)

Material:STAVAX (52HRC)

Coolant:Oil mist

Total machining time:24hr 53min

Measuring position Needle tip diameter
Target [mm] Actual [mm]
A 0.010 0.009
B 0.013
C 0.013
D 0.013

Measuring machine: Nikon

Process Roughing① Roughing② Roughing③ Roughing④ Finishing
Tool MHRH430R
Spindle Speed
20,000 40,000 40,000 40,000 40,000
Feed[mm/min] 1,000 750 500 500 25~300
Depth of cut
ap×ae [mm]
0.01×0.5 ap 0.005 ap 0.005 ap 0.003 0.003×0.04
0.01 0.01 0.05 0.04 -
Time 8min 3hr 19min 2hr 45min 3hr 51min 14hr 50min

※Using 2pcs for finishing.


CBN End Mill Series Vol.4
Square End Mill


CBN End Mill Series Vol.4
Ball End Mill New


End Mill Series Vol.4
Radius End Mill


Work Sample Data

SHPR400 Cutting example of micro slotting

Work size : 30×10mm
Profile : Width 0.1mm / Length 2.5mm / Depth 0.3mm
Use only 1 end mill to finish 100 slots.

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SSPB220 Bottleneck Model

Work size 30×30×30mm
Cutting time: 3hr 25min.

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SSPB220 Hexalobular Punch Model

Work size : Φ25 (Depth 30mm)
Cutting time: 4hr 36min

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SSPBL220 Hot Forging Mold

Work size : 50x50x18.2mm
Cutting time: 4hr (only finishing)

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SSPBTN220 Deep Milling Model

Work size : 30x30mm (cutting depth 15mm)
Cutting time: 18hr 9min.

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SFB200 ELMAX Reflector Model

Work size: 20×20mm
Cutting time: 19 hr 10 min

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SSR200 Precise Milling Model

Work size: 30×30(mm)
Cutting time: 7 hr 57 min

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