The bearing is an important component that supports the rotation of mechanical equipment. The main function is to support the mechanical rotating body, reduce the

friction coefficient during its movement, and ensure its rotationaccuracy. Common materials are GCr15, GCr15SiMn, 50Mn, 42CrMo, 5CrMnMo and the like.
 

The hardness of the bearing after heat treatment is generally above HRC45, and the individual requirements are above HRC60. The processing of such bearings is very

demanding on machine tools and tools, especially in the case of high dimensional accuracy and surface finish requirements. The wear resistance, impact toughness and

fracture resistance are required to be high For the bearing industry, Halnn has developed BN-S20 grades, BN-S200 grades and BN-H11 grades of three CBN tools for

roughing, semi-finishing and finishing machining bearings, respectively. In addition, increase production efficiency and reduce production costs.

Among them, BN-S20 and BN-S200 belong to the non-metallic adhesive solid CBN tools, with strong impact toughness and large allowance for cutting bearings, and BN-H11

belong to the brazed CBN tools, which is mainlyused in the finishing process, and the cutting depth is controlled within 0.3mm.

 
The cutting parameters are as follows:

Specific cases are as follows:

Halnn BN-H11grade CBN tools machining bearings
	Processing procedure: Finish machining Workpieces hardness:HRC62 Tool type:BN-H11 DNGA 150408 Cutting parameters :Cutting speed(Vc)=140m/min                     Feed rate(Fr)=0.12mm/r                     Cutting depth(ap)=1mm
Tool materials	Cutting speed	Tool life	Surface roughness
Halnn BN-H11	140m/min	12pcs/edge	Ra0.8
A brand of ceramic tool	140m/min	10pcs/edge	Ra0.8

Halnn BN-S200 grade CBN tools machining bearings
	Processing procedure: Finish machining workpiece material:42CrMo Tool type:BN-S200 RCMX 090700 Cutting parameters :Cutting speed(Vc)=110m/min                     Feed rate(Fr)=0.45mm/r                     Cutting depth(ap)=0.5mm
Tool materials	Cutting speed	Tool life	Surface roughness
Halnn BN-S200	110m/min	8pcs/edge	Ra0.8
A brand of ceramic tool	90m/min	1pcs/edge	Ra1.6

Note: when using Halnn CBN tools to hard turning bearing, try to use dry cutting processing method, but sometimes for bearing processing accuracy and surface quality and tool life has special requirements, but also can use water-based cutting fluid for continuous, uniform cooling method, to avoid micro-cracks on the CBN tool.