The crankshaft is produced by machining a solid billet block instead of using casting molds. This process maintains material consistency throughout the crankshaft body and provides greater control over geometry, stroke dimensions, and counterweight arrangement.
The billet structure is suitable for modified engines, prototype development, and special engine projects requiring specific crankshaft configurations.
The counterweight profile is developed through CNC machining to control mass distribution and rotational balance.
Compared with fixed-shape production methods, CNC processing allows material removal and profile optimization in selected areas. The aerodynamic weight design reduces unnecessary mass while maintaining structural support, helping reduce rotational resistance during high-speed operation.
Gun drilling creates internal lubrication channels within the crankshaft structure. Combined with direct oil injection ports, the oil passage design improves lubrication delivery around critical journal areas.
This structure supports crankshaft operation under conditions involving higher mechanical loads and continuous rotation.
Main journals and connecting rod journals require precise machining to maintain proper bearing contact, crankshaft balance, and stable engine operation.
SHENGFA uses CNC machining to achieve consistent control over journal dimensions, oil passage positions, mounting interfaces, and surface finish, supporting reliable assembly performance and long-term operating stability.
CNC machining supports crankshaft structures beyond standard configurations, including changes in geometry, counterweight profile, oil passage layout, and connection interfaces.
This capability is suitable for prototype engines, modified builds, and specialized crankshaft development.
Machining from billet material preserves consistent material structure. Combined with Shengfa’s CNC machining experience and forging process knowledge, the crankshaft is manufactured with attention to structural integrity and machining accuracy for high torque output and repeated mechanical loads.
It is commonly applied in racing engines, heavy-duty power systems, and specialized engine projects.
CNC machining enables controlled material removal while maintaining required structural support. Optimized weight distribution reduces unnecessary rotational load and improves crankshaft response.
Accurate machining of journals and counterweights also improves balance control, helping reduce vibration caused by uneven rotation.
The production process includes billet preparation, rough machining, precision machining of journals and interfaces, oil passage processing, surface finishing, and dimensional inspection.
Shengfa uses CNC turning machines and CNC machining centers to process complex crankshaft geometries with controlled machining accuracy. For related component production, please view our CNC Machining Parts and CNC Machining Service.
Shengfa applies multiple inspection methods to verify dimensions, surface condition, and internal structure.
| Inspection Equipment | Application |
|---|---|
| Coordinate Measuring Machine (CMM) | Dimensional accuracy and geometry verification |
| 2D Optical Projector | Profile and contour inspection |
| Surface Roughness Tester | Machined surface finish measurement |
| X-ray Inspection Machine | Internal structure inspection |
| Ultrasonic Cleaning Machine | Precision cleaning after machining |
| Comparison | CNC Billet Crankshaft | Forged Crankshaft |
|---|---|---|
| Manufacturing method | Machined from solid billet material | Formed through forging process |
| Geometry design | Supports application-specific crankshaft development | Limited by forging tooling |
| Counterweight development | Optimized through CNC machining | Requires forging die modification |
| Production application | Prototype and specialized projects | Repeated production applications |
| Common usage | Racing, modified engines, special applications | Standard performance engines |
CNC billet crankshafts are used in racing engine projects where balance, journal accuracy, and lubrication structure affect engine operation.
The combination of billet machining, optimized counterweights, and internal oil passages supports high-speed engine configurations.
Heavy-duty and marine engines generate continuous torque loads on crankshaft components.
The billet structure and CNC machining capability allow crankshaft geometry and lubrication features to match different operating conditions.
Prototype and modified engines often involve non-standard crankshaft structures.
CNC machining provides the accuracy needed for low-volume development, modified engine builds, and specialized configurations.
Founded in 2007, Ningbo Shengfa Hardware provides precision metal manufacturing services including CNC machining, forging, investment casting, and die casting.
The production system includes CNC turning machines and CNC machining centers for complex metal component processing.
Shengfa uses CMM measurement, optical projection inspection, X-ray inspection, surface roughness testing, and ultrasonic cleaning equipment during production.
These inspection methods support dimensional verification, surface evaluation, and process control for precision machined components.
住所
Yunlong Town、Ningbo City、Zhijiang Province、China
