The wind power and construction machinery industries demand exceptional precision, durability, and reliability in the machining of large-scale, high-strength components. These sectors require cutting tools that can handle complex structures, hardened materials, and high-volume production. Halnn, as a leading manufacturer of superhard cutting tools, offers comprehensive and customized machining solutions for key parts such as gears, bearings, shafts, planetary carriers, hydraulic valves, hubs, and blades. We help manufacturers achieve higher efficiency, longer tool life, and reduced production costs.

Key Application Components

Bearings	Gears	Drive Shafts	Main Shafts
Hubs	Planetary Carriers	Blades	Hydraulic Valves

Comprehensive Machining Solutions

1 Turning  

Pre-Heat Turning		Carbide inserts are used for rough machining of gear end faces, bearing inner/outer diameters, and shafts, supporting deep cuts and high productivity.
Post-Heat Hard Turning		CBN inserts are ideal for hardened components (HRC60+), offering outstanding wear resistance, dimensional stability, and surface quality.

2 Milling  

Gear Profile Milling		Rough and pre-grind milling cutters for high-accuracy gear profiles. Long tool life and consistent performance.
High-Speed Gear Hobbing		Suitable for modules M5–M38 with optimized tooth arrangements for rough and semi-finishing of external teeth.
Gear Shaper Cutters		Designed for small-module (M3.5–M10) and internal gears. Indexable design, no regrinding required.
Planet Carrier Milling		Anti-vibration three-edge cutters engineered for large overhangs and deep cuts, reducing chatter and improving efficiency.
Hub Milling		Multi-edged double-sided inserts with extremely high  material removal rates.

 3 Drilling  

Crown Drill		Quick-change design, internal cooling, and excellent chip evacuation for complex deep-hole drilling in hubs and bearings.
Gun Drills		Available in brazed, solid carbide, and indexable designs, suitable for Ra <2 finish. Custom depths supported.
Hydraulic Valve Drilling		Composite drills, reamers, and T-slot cutters ensure Ra0.4–Ra0.8 surface finish and high alignment precision.
Blade Machining		PCD inserts minimize burrs and delamination when drilling composite materials.

4 Threading 

Staggered Tooth Thread Mills		For large-diameter internal threads (M30–M64), high-speed cutting with internal cooling and lower tooling cost.
Thread Taps		TIN-coated HSS taps for high-hardness materials (HB280–330), offering excellent chip control and guidance.

5 Boring  

Damping Boring Tools		Designed for large overhangs with low-vibration performance to ensure excellent surface finishes.
CMR / CMB Rough and Finish Boring Tools		Standard and non-standard solutions for high-precision hole machining in hubs and planetary carriers.

6 Reaming 

Composite Forming Reamers

Used in hydraulic valve machining, achieving Ra0.4 surface roughness for sealing and assembly accuracy.

Why Choose Halnn?

Comprehensive Tool Range: CBN, PCD, carbide, and composite tools available  

High Performance: Long tool life, stable machining, and high cutting speeds  

Custom Solutions: Tailored non-standard tools to match customer requirements  

Technical Expertise: Support for process optimization and tool application  

Industry Experience: Proven success across wind energy, construction, and heavy industries

Processing Case

Processing part: Wind power bearing,  Inner Ring Rib
Processing size: 2750mm
Material: 42CrMo4
Hardness of Bearing:  58-63 HRC
Surface Roughing: Ra 0.4
Inserts Type：BN-H200 RNGN090300
Machining way：Roughing
Machining parameter：Vc=190m/min Fr=0.32mm/r, Ap=0.6-0.7mm
Machining way: Finishing
Machining parameter：Vc=215m/min，Fr=0.2mm/r，ap=0.2mm

	Processing part: Wind power bearing,  Outer Ring Raceway
	Processing size: 2750mm
	Material: 42CrMo4
	Hardness of Bearing:  58-63 HRC
	Inserts Type：BN-H200 RNGN090300
	Machining way：Roughing
	Machining parameter：Vc=190m/min, Fr=0.43mm/r, Ap=1mm
	Machining way: Finishing
	Machining parameter：Vc=260m/min，Fr=0.2mm/r，ap=0.1mm

Heat-treated bearings, such as wind turbine bearings, metallurgical bearings, and wheel hub bearing units, generally have a hardness above HRC50, which puts high demands on the wear resistance and life of the tool.

Large-scale bearings, such as wind turbine bearings, have large diameters. After heat treatment, the machining allowance is 2-6mm, and the machining allowance is uneven. Moreover, there are oil holes in the lunar groove of the outer ring raceway of the machining part. The tool needs good impact resistance and toughness. It will break easily. At the same time, bearings have higher requirements for accuracy and surface roughness. For example, the accuracy tolerance of the raceway radian of the wind turbine bearing is 0.08, and the surface roughness of the raceway is Ra0.4.

With the continuous development of the modern tool industry, the cubic boron nitride (CBN) tool BN-H200 material developed by the superhard material industry effectively solves the problem of difficult bearing machining and can meet the requirements of high quality, high efficiency and low cost at the same time.

 Get in Touch for Tailored Machining Solutions

Asia: asia@halnn-group.com  

Europe: europe@halnn-group.com  

Americas: americas@halnn-group.com  

At Halnn, we are committed to delivering efficient, stable, and customized cutting tool solutions for the wind power and construction machinery industries.