• Please note that due to the corona virus most of the production from China has been transferred to other manufacturing sites starting from 29. January 2020. For this reason, the lead time of some transferred products had to be extended.

SUMIBORON Insert, Triangle-Shape With Hole, Negative, 3NC-TNGA

SUMIBORON Insert, Triangle-Shape With Hole, Negative, 3NC-TNGA

· The main component in SUMIBORON is Cubic Boron Nitride (CBN), with a special ceramic bonding material added, and sintered under super high pressure and temperature; compared with conventional tool materials, CBN features higher hardness and excellent heat-resistant properties.
· No-sharpening, single-use type for easy tool management.
· Multiple SUMIBORON pieces are brazed onto a single tool insert, resulting in a more economical unit price per cutting blade compared with single-use, 1-corner types.
· G-class precision specification that features all-around polishing. All corners are additionally marked with numbers to simplify keeping track of already-used corners.


  • 3NC-TNGA160416, 3NC-TNGA160420 and 3NC-TNGA160424 are specialized for holders for SUMIBORON high efficiency machining.

Part Number

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Part Number
Part NumberStandard Unit PriceVolume DiscountShipping Days?Application Available corners Nose Radius Corner height tolerance Inscribed Circle Tolerance Thickness Tolerance With/without Hole Hole Shape Breaker Y/N Material type Detailed Nose Radius
Machining Applications (2) Specification details Blade Length
Material Number of cutting blades Types of cutting blades Type symbol

59.72 €

5 Days -3Other---YesCylindricalNA / NoBNC20102-Standard cutting edge3Coated CBN---

59.72 €

5 Days -3Other---YesCylindricalNA / NoBNC20202-Standard cutting edge3Coated CBN---

59.72 €

5 Days -3Other---YesCylindricalNA / NoBNC20102.4-Standard cutting edge2.7Coated CBN---

59.72 €

5 Days -3Other---YesCylindricalNA / NoBNC20202.4-Standard cutting edge2.7Coated CBN---


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Basic information

Shape T (Triangle) Work material High Hardness Material Rake angle Negative
Clearance angle(°) 0 Slot Hole Symbol A Dimension S(mm) 4.76
Dimension φD(mm) 9.525

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