Halnn CBN Cutting inserts and CBN Cutting tools turning bearing

The bearing material is generally bearing steel, which is divided into high carbon chromium bearing steel, carburized bearing steel, stainless bearing steel, slewing bearing steel and special performance steel.

Common bearing steels are GCr15, 42CrMo, 50Mn, which are commonly used materials for large wind power bearings, slewing ring bearings, and metallurgical bearings.

The different types of bearing steel grades are as follows

Internationally common bearing material grades

Turning bearing insert type is selected according to the bearing type and processing technology. Halnn CBN BN-S20, BN-H11, BN-H200, BN-H20 grades are widely used in bearing turning. The recommended cutting parameters are as follows

Application case

	Workpiece: Metallurgical Bearings( GCr15)
	Machining parts: outer circle, inner hole
	Hardness: HRC62
	Insert Type: BN-H11 DNGA150408
	Cutting parameters: Vc=140m/min, Fr=0.12mm/r, ap=0.5mm
	Processing method: dry cutting
	Insert grade	Cutting Speed	Tool Life/edge	Roughness
	Halnn BN-H11	140m/min	12pcs	Ra0.8
	Other Brand CBN	140m/min	10pcs	Ra0.8

Workpiece: Wheel hub bearing unit Hardness: HRC58-62 Inserts type: BN-H10 C25 CNGA120408 Processing parameters: Vc=180m/min, Fr=0.1mm/r, ap=0.15mm Roughness: ≤Ra0.6     Coated inserts can achieve better cutting performance, improve machining accuracy and life

Processing part: Outer ring raceway of wind power bearing Processing size: 2750mm                        Workpiece material: CGr15 Hardness: HRC58-63                               Roughness: Ra0.4 Roughing Insert type: BN-H200 RNMN090300 Processing parameters: Vc=190m/min, Fr=0.43mm/r, ap=1mm Finishing Insert type: BN-H200 RNMN090300 Processing parameters: Vc=260m/min, Fr=0.2mm/r, ap=0.1mm

Recommended Cutting parameters:

Small and medium-sized bearings and non-standard bearing inner and outer rings for fine turning (hardness of Gcr15 material is above HRC62)

Recommended grade: BN-H20 (margin <0.5mm); BN-S20 (margin >1mm)

Recommended Cutting parameters: ap=0.1-0.3mm, Fr=0.1-0.12mm/r, Vc=120-180m/min

Turning slewing ring bearing raceway, end face, hardness HRC47-55, margin <2mm

Recommended grade: BN-S200 grade(round insert)

Recommended cutting parameters: ap≤1mm, Fr=0.05-0.35mm/r, Vc =60-250m/min

Processing effect: The tool life is 7 times that of ceramic tools, and the surface roughness is controlled between Ra0.6-1.0

Turning the outer circle and end face of the slewing ring bearing, the hardness is HRC47-55, the channel hardness is HRC55-62, margin ≥ 2mm

Recommended grade: BN-S20 grade

Recommended cutting parameters: ap=1mm, Vc=140 -180m/min

Processing effect: long tool life, can replace rough grinding, surface roughness reaches Ra0.4