CBN tools BN-H10&BN-H21 for hard turning gear from Hlann

As an important transmission component in mechanical equipment, gears are widely used in machine tools, automobiles 

and other industries. With the increasingly fierce market competition in the gear industry, how to achieve cost reduction and 

efficiency under the conditions of ensuring product quality has become the survival and development of the gear industry. 

The key, hard turning is undoubtedly an important way to solve these problems.

The hard turning gear is the turning method of the hardened gear as the final finishing process. The processing quality can 

replace the grinding process, which is also called the “turning instead of grinding” process.

                                                        Advantages of turning gears compared to grinding processes

Cost: The investment of lathe is only 1/3-1/10 of the grinding machine, which not only reduces the capital investment of machine 

tools, but also enables flexible production and efficient use of equipment;

Quality: 80% of the heat generated during the turning of the gears is carried away with the chips, avoiding problems such as 

burns and cracks during the grinding process;

Efficiency: Turning efficiency is 4-6 times of grinding;

                                                                    Tool material selection for turning gears

Hard turning gears have higher performance requirements for cutting tools, especially in the strict dimensional accuracy and surface 

finish of gears, and even under strong intermittent cutting conditions. At present, hard-turned gears are mostly processed with imported 

CBN tools. Halnn have developed CBN tools BN-H10 & BN-H21 for continuous cutting and interrupted cutting, respectively. Its excellent 

cutting performance has outstanding advantages in the field of hard turning gears, breaking the monopoly of foreign PCBN tool hard 

turning gears in China.




                                                    

                                                Advantages of CBN tools BN-H10 & BN-H21 hard turning gears

                                                      Case of CBN tools BN-H10&BN-H21 hard turning gears 

Halnn CBN tools BN-H10 continuous turning gear inner hole.
	Processing conditions: continuous hard turning Workpiece hardness: HRC58-62 Tools type: BN-H10 CNGA120408 Cutting parameters: Cutting speed(Vc)=180m/min, Feed rate(Fr)=0.1mm/r, Cutting depth(ap)=0.2mm Processing method: dry cutting
Tool material	Cuttingspeed(Vc)m/min	Tool life pcs/edge	Production beat s/pcs
Halnn BN-H10	180m/min	800	6s
a European ceramic cutter	130m/min	150	8.5s

Halnn compound CBN tools BN-H21 interrupted cutting gear end
	Processing conditions: heavy interrupted turning Workpiece hardness: HRC58-62 Tool type: BN-H21 WNGA080408 Cutting parameters: Cutting speed (Vc)=300m/min, Feed rate(Fr)=0.1mm/r, Cutting depth(ap)=0.3mm Processing method: dry cutting
Tool material	Cutting speed (Vc) m/min	Cutting depth(ap) mm	Production beat pcs/edge
Halnn BN-H21	300	0.3	600
a European CBN tools	300	0.3	450