NTK切削工具

B5K/B52

連続加工用 | 高硬度材加工用CBN

高性能、低価格、多用途なCBN
トップ / CBN / B5K/B52

高精度加工に特化したCBN材質

連続加工に特化したCBN材質
HRC55以上の高硬度材加工に最適
Features
  • Coated CBN grade : BHN320 / BHN330
  • Uncoated CBN grade : BH320 / BH330 / BH340
Application area for turning

Hardened steel – Finishing

Coated CBN BHN320

The first recommended material for continuous to light interrupted machining,
with a coating that has excellent wear resistance.

BHN320 Competitor

Alloy steel(HRc62)
vc = 150m/min, f = 0.1mm/rev, ap = 0.2mm, Continuous

Coated CBN BHN330

A multi-layer coating with excellent wear resistance and chipping resistance is used,
making this a versatile material that can be used for continuous to interrupted machining.

BHN330 Competitor
Number of impacts 2800 times

Alloy steel(HRc62)
vc = 75m/min, f = 0.1mm/rev, ap = 0.1mm, Heavy interrupted

Number of times until breakage

Uncoated CBN BH320

CBN is bonded with a special binder, providing excellent wear resistance at high speeds and continuous cutting.

BH320 Competitor

Alloy steel(HRc62)
vc = 150m/min, f = 0.1mm/rev, ap = 0.2mm, Continuous

Uncoated CBN BH330
A general-purpose material that exhibits excellent wear resistance and fracture resistance in continuous to heavy interrupted applications.
BH330 Competitor

Alloy steel(HRc62)
vc = 150m/min, f = 0.1mm/rev, ap = 0.2mm,
After processing 0.7km

BH330 Competitor
Number of impacts 3500 times

Alloy steel(HRc62)
vc = 150m/min, f = 0.1mm/rev, ap = 0.2mm, Heavy interrupted

Uncoated CBN BH340

High resistance to chipping and fracture, highly recommended for heavy interrupted cutting.

BH340 Competitor
Number of impacts 4300 times

Alloy steel(HRc62)
vc = 75m/min, f = 0.1mm/rev, ap = 0.1mm, Heavy interrupted

Number of times until breakage

Cutting edge preparation according to processing purposes
- - - Scroll the table - - -
●1st Recommendation
〇2nd Recommendation
Interruption length Recommended material Cutting speed Feed DOC Machining
(m/min) (SFM) (mm/rev) (IPR) (mm) (inch) DRY WET
Continuous cutting BHN320 (Coated CBN)
BH320
100 – 300 330 – 1000 up to 0.2 .008 up to 0.5 .020
Light interrupt cutting BHN330 (Coated CBN)
BH330
75 – 225 330 – 740 up to 0.15 .006
Heavy interrupted cutting BH340 50 – 150 160 – 500 up to 0.1 .004
Automotive parts
Insert :
VNGA 160408 PQ S01015
Material :
Carbon steel (HRc60)
Cutting speed :
150 m/min 500 SFM
Feed :
0.12 mm/rev .005 IPR
DOC :
0.2 mm .008 inch
Coolant :
WET
BHN320

400 pcs / corner

Competitor’s CBN

200 pcs / corner

Conventionally, Competitor’s CBN would reach the end of its tool life due to a deterioration in the machined surface roughness, but BHN320 suppresses notch wear and achieved double tool life.

Automotive parts
Insert :
DNGA 150412 PQ S01535
Material :
Alloy steel (HRc62)
Cutting speed :
100 m/min 330 SFM
Feed :
0.1 mm/rev .004 IPR
DOC :
0.1 mm .004 inch
Coolant :
DRY
BH340

140 pcs / corner
(Improved stability)

Competitor’s CBN

100 pcs / corner
(Not stability)

Conventional CBN frequently suffered from sudden chipping, but BH340 can be stably machined up to a certain point.

関連ニュース
NTKカッティングツールズは、新しいCBNシリーズの発売を誇りにもって発表します。本シリーズは、焼結合金、鋳鉄、焼入れ鋼の加工において長寿命、安定した加工、優れた仕上げ面を実現するために設計された、3つの専門シリーズにわたる8種類のCBN材質です。 ...
新CBN材質インサート「BHN/BH/BKシリーズ」発売を記念して、今だけお得な特典をご用意! ...
4月 23, 2025
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