CBN-B50 – Vitrified & Metal Bond CBN Grit

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Product Overview

CBN-B50 is a strong, blocky monocrystalline CBN grit developed for vitrified and metal-bond grinding tools requiring stable grain geometry and good wear resistance. Compared with more friable black CBN grades, its stronger crystal structure and lower friability help maintain abrasive integrity under sustained grinding loads, while retaining sufficient cutting ability for hardened steels and other ferrous materials.

Features

Strong Blocky Crystal Morphology: Provides stable abrasive geometry under sustained grinding loads.
Higher Grain Strength: Offers improved resistance to premature particle breakdown.
Controlled Friability: Balances grain durability with useful abrasive renewal during grinding.
Good Wear Stability: Supports consistent cutting performance and abrasive life.
Vitrified and Metal Bond Compatibility: Suitable for bonded tools requiring stronger and more stable CBN grains.

Specifications

Abrasive Type	Monocrystalline Cubic Boron Nitride
Product Series	Mesh CBN Grit
Grade	CBN-B50
Color Family	Black
Grade Direction	Vitrified & Metal Bond / Strong Blocky Grade
Crystal Morphology	Blocky monocrystalline particles
Relative Strength	Medium to High
Friability	Low to Controlled
Selection Focus	Grain stability, wear resistance and controlled cutting
Typical Bond Systems	Vitrified Bond / Metal Bond

Comparison Table of Monocrystalline CBN Grit Size

US Mesh Size	GB/T 6406-2016 / ISO 6106	FEPA CBN Designation	Nominal Size Range (μm)
70/80	213	B213	212–180
80/100	181	B181	180–150
100/120	151	B151	150–125
120/140	126	B126	125–106
140/170	107	B107	106–90
170/200	91	B91	90–75
200/230	76	B76	75–63
230/270	64	B64	63–53
270/325	54	B54	53–45
325/400	46	B46	45–38
400/500	39	B39	38–32
500/600	33	B33	32–26

Particle size designations are provided according to commonly used superabrasive grit standards. Product-specific size availability should be confirmed according to the selected CBN grade.