In the process of processing auto parts, the tool often has problems such as wear resistance, low efficiency or high hardness of the parts, and the processing does not move. For these reasons, Halnn has developed a variety of grades to deal with different materials of auto parts. The specific cutting parameters are as follows

Brake Discs/Drums

Brake discs/drums, as typical mass-produced Auto parts, mainly material is gray cast iron. And large enterprises mostly use special machines or automatic production lines for brake discs and brake drums for production, which have high performance requirements for machine tools and cutting tools. While ensuring the quality, the company pays more and more attention to the improvement of efficiency. For this, Halnn which can better meet the requirements of high-speed machining of brake discs and brake drums, Halnn CBN tool life and stability are 50% or even several times higher than that some brand CBN inserts.

BNK30, a new CBN grade developed by Halnn tools, adopts the optimal ratio of nano-scale binder and high-purity CBN particles. 

Recommended inserts and grades

Roughing Brake discs and Brake drums: Insert grade: BN-S300, Insert types CNMN/SNMN

Finishing Brake discs and Brake drums: Insert grade BNK30, Insert types SCGN/CNGA/WNGA/TNGA/VNGA, etc.

High-speed cutting at cutting speed of 500-2000m/min, to meet the stable cutting of brake disc and brake drum parts, especially finishing, the performance advantage is more obvious.

At the same time, Halnn tools can also customize inserts such as wipers and coatings according to customer needs to help high-speed cutting of brake discs and brake drums.

Application cases

Engine block

Milling process: Halnn CBN insert BN-S300 is used, which has significantly improved productivity and stable cutting performance, which can advantageously replace international first-line brands such as Seco tools.

Boring process: BN-S300 grade or BNK30 grade is recommended, which has high cost performance and stable cutting performance, and is one of the representative works of localization of tools in the engine industry.

Cylinder port chamfering process: Customized according to customer needs, the advantages are stable cutting performance and high cost performance.

For the aluminum alloy engine block: Halnn PCD tools are selected for high-speed milling flat, the cutting speed can reach 3000m/min, and it has excellent processing characteristics. For the hole system, Halnn PCD reamers are recommended to improve tool life and ensure high dimensional accuracy and surface roughness.

	Workpiece: Engine Block
	Material: FC250(HB170~210)
	Insert Type: BN-S300 SNEN090308
	Cutting parameters: Vc=1700 m/min, Ap=0.3mm, Fz =0.12mm/r
	Processing method: dry cutting(Finish milling)
	Insert grade	Feed Rate	Tool Life/edge	Efficiency
	Halnn BN-S300	3670mm/min	100 pieces	Improved 0.6 times
	Some brand CBN	2200mm/min	80 pieces	/

Engine cylinder head

Finish milling cylinder head: BN-S300 grade Solid CBN insert is recommended, the productivity is significantly improved and the cutting performance is stable. It can advantageously replace international first-line brands such as Seco Tools.

Valve chamfering: customized according to customer needs, the advantages are stable cutting performance and high cost performance.

Turning valve seat ring: DCGW11T304 etc. is recommended for commonly types. The advantage is that high-speed cutting can be achieved and a higher finish can be obtained.

Boron cast iron cylinder liner

Cylindrical turning: BN-S300 grade of Solid CBN insert is recommended, which can be dry-cut, and its tool durability is N times higher than that of ceramic tools.

Grooving: customized according to customer requirements to obtain longer tool life and higher production efficiency.

	Workpiece: Finish turning Cylindrical
	Material: Boron cast iron
	Insert Type: BN-S300 SNMN120412
	Cutting parameters: Vc=850 m/min, Ap=0.5mm, Fz =0.25mm/r
	Processing method: Wet cutting
	Insert grade	Cutting speed	Machining beat	Tool Life/edge
	Halnn BN-S300	850m/min	23 s/piece	120 pcs
	Ceramic inserts	500m/min	40 s/piece	25 pcs

Gear, Gear shaft

Recommend Grade and Process conditions

BN-H05 and BN-H11 grades for continuous process, with can high-speed cutting

BN-H10 and BN-H20 grades for Light interrupted cutting conditions, can withstand the impact of the keyway during hard turning, with stable performance

BN-H21 grade of PCBN insert is recommended for heavy interrupted cutting conditions, with good toughness, impact resistance and stable performance

Cases of Hardened Steel Gear Process

Gearbox housing

Milling process: The BN-S300 grade for Solid CBN insert is recommended, which significantly improves the production efficiency of the coated carbide tool and increases the tool life by N times.

Boring process: PCBN inserts (including composite and brazed) are recommended, which can significantly improve production efficiency and achieve higher surface quality.

For aluminum alloy gearbox housing: Halnn tools can provide PCD milling, boring, reaming, drilling and other tools, which greatly improves production efficiency, ensures high dimensional accuracy and reduces production costs.

Pulley

The material is HT250, which is mainly used for end face machining. PCBN inserts (including composite and brazed types) are recommended. The advantages are: stable cutting performance and doubled production efficiency.

Cv Joint

Process: Hard turning process after hot, recommended PCBN inserts, cost-effective, stable cutting performance, and can intermittent machining.

	Workpiece: CV joint (finish)
	Material: Hardened Steel
	Insert Type: BN-H10 TNGA160408
	Cutting parameters: Vc=190m/min, Fr=0.15mm/r, ap=0.15mm
	Processing method: Dry cutting
	Insert grade	Cutting speed	Tool Life/edge	Tool cost
	Halnn BN-H10	190m/min	355 pcs	0.06 RMB/pc
	Other CBN inserts	170m/min	370 pcs	0.1 RMB/pc

Synchronized pulley

The material is powder metallurgy. Due to the porous structure, the cutting edge of the cutting tool wears sharply. At this time, Halnn tools PCBN insert is recommended, the advantages are: sharp inserts, stable cutting performance, and tool life is increased by 50% compared to other brands CBN tools.

	Workpiece: Synchronized pulley(Finishing)
	Material: Powder metallurgy
	Insert Type: BN-K50 DCGW11T304
	Cutting parameters: Vc=150m/min, Fr=0.1mm/r, ap=0.2mm
	Processing method: Dry cutting
	Insert grade	Roughness	Tool Life/edge
	Halnn BN-K50	≤Ra0.8	450 pcs
	Other CBN inserts	Ra1.0	300 pcs

Synchronizer Gear Hub

The material is powder metallurgy. Due to the porous structure, the cutting edge of the cutting tool wears sharply. At this time, Halnn PCBN inserts are recommended. The cutting performance is stable, and the tool life is 45% higher than that other brands CBN tools.

	Workpiece: Synchronizer Gear Hub(Finishing)
	Material: Powder metallurgy
	Insert Type: BN-K50 DCGW11T304
	Cutting parameters: Vc=500m/min, Fr=0.1mm/r, ap=0.2mm
	Processing method: Dry cutting
	Insert grade	Tool Life/edge	Efficiency
	Halnn BN-K50	145 pcs	Improved 45%
	Other CBN inserts	100 pcs	/

Wheel hub

The material is aluminum alloy. Halnn PCD tools are recommended. The cutting performance is more stable, the tool service life is longer, and the efficiency and cost are improved. Halnn can provide non-standard customized services.

Pistons

The material is aluminum alloy. Halnn PCD tools are recommended, which can be processed at high speed, with stable product quality, high precision and long life. And provides non-standard customization services.