As the automotive industry moves toward higher precision, lightweighting, and efficiency, the machining of key powertrain, hydraulic, and transmission components requires tools that are durable, efficient, and highly adaptable. Halnn offers a full range of professional cutting solutions using CBN, PCD, ceramic, and advanced carbide tools to support the high-performance demands of modern automotive manufacturing.

Powertrain System Solutions

The powertrain system includes core engine components such as the cylinder block, cylinder head, crankshaft, camshaft, piston, and cylinder liner. Halnn provides complete machining solutions for all stages—from roughing to high-precision finishing.

Key Applications:

·Cylinder Block & Head: PCD drills, reamers, honing tools for valve seat, guide holes, and cylinder bore machining  

·Crankshaft / Camshaft: CBN inserts for turning, broaching, milling, and oil-hole machining  

·Piston & Cylinder Liner: High-precision tools for forming and finishing high-hardness materials

Recommended Tools:  

PCD Drills, Honing Tools, CBN Inserts, Diamond Grinding Wheels, Custom Boring Tools

Application case:

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

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.

Camshaft

Specification range

Diameter: 320-800mm

Width range: 15-60mm

Customized external milling cutterhead according to customer crankshaft.

Insert Type

Applications

The diameter of insert: 320mm              Cutting speed: 120m/min             Cutting depth: 5 mm

Feed rate:0.15mm/min                     Machine: Special machine

Crankshaft

Non-standard insert

Product feature

1. The insert adopts high toughness matrix with high quality CVD coating to provide higher processing efficiency and tool life;

2. Grinding precision insert combined with optimized tooth arrangement design, to make workpiece surface achieving the pre-grinding standard;

3. Cutting parts adopt segmented modular installation design, easy to unload and adjust;

4. Excellent cutting performance, to achieve a high chip removal efficiency.

Process Case

Product name: Crankshaft

Processed material: 42CrMo

Material hardness: HB256-295

Machine type: special machine

Industry type: Automobile industry

Customer requirement: improve processing surface quality, reduce tool cost

Comprehensive evaluation: Meet customer roughness requirement. According to the tool wear analysis, The Halnn tool wear is lighter than the current tool, still could continue processing. There is no breakage, just normal wear, solve the anti-breakage property of insert. Improve the stability of cutting tools.

Crankshaft Deep Hole Drilling

Product advantages:

• The latest designed four-plane drill tip ensures good chip breaking effect;

• Special groove and edge treatment, excellent chip holding capacity and smooth chip removal;

• The use of cross-edge thinning technology greatly reduces axial resistance;

• Selected heat-resistant and wear-resistant coatings greatly increase tool life;

• For oil mist cooling, large-hole inlet rods are selected for better lubricity.

Application range:

    Processing diameter range: 12D-50D

    Effective drilling depth: 400mm

Application cases:

Workpiece: crankshaft                 Workpiece material: 42CrMo

Hardness: HRC28-32                     Drilling depth: 150mm

Machine: vertical machining center

Drilling method: continuous machining

Results: Under the same processing parameters, the life of Halnn’s insert increased by 22%.

Hydraulic System Solutions

Hydraulic systems are critical in vehicle control and braking, demanding high surface finish and positional accuracy. Halnn’s cutting tools ensure exceptional results for complex valve bodies and fluid system components.

Key Applications:

·ABS Valve Bodies: One-pass drilling, forming, and finish reaming for solenoid and motor holes  

·Brake Pump Components: Multi-step reaming, dual-side face milling with PCD cutters  

·Steering Gear Housing: Inner hole reaming, face milling, pin hole machining, and cylinder surface processing  

·Valve Plate / Core: Composite machining with high-precision reaming and guide strip tools

Recommended Tools:  

PCD Reamers, Solid Carbide Drills, Multi-edge Reamers, PCD Face Milling Cutters

Application Case:

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

Transmission System Solutions

Transmission systems require stable and wear-resistant tools to handle hardened gears, shafts, and clutch housings. Halnn offers CBN solutions for continuous and interrupted turning, as well as advanced hole-making tools.

Key Applications:

·Transmission & Clutch Cases: Adjustable and fixed boring tools for inner hole processing  

·Gears (20CrMnTi HRC58-62): CBN tools for hard turning, improving tool life and cutting speed  

·CV Joint & Differential Case: Chamfer drilling, reaming, and hard turning with coated inserts  

·Hub Bearings: PCD drills and milling cutters for long tool life and surface accuracy

Recommended Tools:  

CBN Inserts (BN-H05, H10, H20, H21), Indexable Drills, Crown Drills, PCD Milling Cutters

Application Case:

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.

 Why Halnn?

·Tailored Cutting Solutions: Non-standard tools designed for specific vehicle components  

·High Performance: Long tool life, excellent surface finish, stable under high loads  

·Advanced Materials: Specializing in superhard tools (CBN, PCD, ceramic, carbide)  

·Trusted by OEMs: Proven solutions across engine, brake, and transmission lines  

·Efficient Support: Fast response, application testing, and tool optimization services