CNC Turn-Mill & Cylindrical Grinder for High-Value Eccentric Shaft Machining

1. Product Overview
This dedicated eccentric shaft machining unit is a fully integrated production solution built for high-precision, high-volume eccentric component manufacturing. It pairs advanced CNC turn-mill centers with ultra-rigid high-precision cylindrical grinders, eliminating process fragmentation between turning, milling, and finishing operations. The complete workflow is engineered to deliver consistent micron-level accuracy across complex eccentric curved surfaces, making it ideal for automotive, hydraulic, new energy, and precision machinery sectors.
Unlike conventional separate lathe and grinder setups that rely on repeated manual clamping, this integrated unit completes nearly all forming operations in a single positioning cycle. It drastically reduces secondary alignment errors, stabilizes final part tolerance, and shortens overall production lead times for both low-volume custom prototypes and large-batch serial orders.
2. Core Equipment Configuration
CNC Turn-Mill Center
•Equipped with high-rigidity gantry structure and HSK A63 high-speed electric spindle, supporting full turning, milling, drilling, and tapping operations in one setup
•Features 360° full-rotation C-axis and ±120° swing A-axis, capable of forming asymmetrical eccentric profiles, keyways, angled holes, and helical grooves without re-clamping
•Compatible with Siemens / FANUC / Huazhong CNC systems, with built-in eccentric turning parametric cycle for one-click geometry definition
•Maximum workpiece swing diameter up to 320mm, maximum supported workpiece weight 100kg, covering most standard eccentric shaft specifications
High-Precision Cylindrical Grinder
•Adopts hydrostatic spindle and hydrostatic bearing design, paired with heavy-duty hard rail X-axis to ensure zero vibration during heavy stock removal and fine finishing
•Supports automatic eccentric distance parameter input, directly linked to the turn-mill program coordinate system for zero-datum offset between pre-machining and grinding
•Delivers final surface roughness down to Ra 0.4μm, with journal roundness deviation strictly controlled under 0.008mm
•Built-in hydraulic oil cooling system and dynamic balancing device, maintaining thermal stability even during 24/7 continuous mass production cycles
3. Key Machining Advantages
•Zero Secondary Clamping Error: One single positioning from raw bar to near-finished profile, eliminating tolerance stack-up caused by repeated manual alignment
•Complex Surface Full Coverage: Smoothly handles discontinuous eccentric curves, multi-step journals, and asymmetric end faces that conventional lathes cannot form in one pass
•±0.01mm Batch Tolerance Stability: Even under 1000+ parts per month mass production, the full process maintains consistent concentricity, eccentric distance, and runout performance
•Uninterrupted Automated Operation: Matched with automatic loading/unloading system, the unit supports 24/7 lights-out production, cutting manual labor cost by over 40% and shortening lead times by 30%
4. Full Quality Assurance System
•Raw Material Incoming Check: 100% spectral analysis for every batch of steel bar to verify chemical composition and eliminate material defect risks
•In-Process Patrol Inspection: Real-time dimensional sampling after turn-mill forming, with automatic tool compensation triggered if deviation exceeds threshold
•Final Full Inspection: 100% CMM + dial indicator testing for all finished parts, covering eccentric distance, journal roundness, total runout, and surface roughness
•Full Traceability: Every part has a unique processing record, linking equipment runtime, inspection data, and operator information for full lifecycle quality tracking
5. Typical Application Scenarios
This machining unit is widely adopted for manufacturing eccentric shafts in automotive engine systems, hydraulic pump components, new energy vehicle transmission shafts, precision gear shafts, and robot joint eccentric parts. It supports custom processing for metal materials including alloy steel, stainless steel, and titanium alloy, as well as high-precision machining for selected engineering non-metallic materials.
6. Customization & Service
We provide complete turnkey eccentric shaft machining solutions, including equipment layout optimization, process flow customization, and personnel operation training. For special eccentric part specifications beyond standard parameters, non-standard configuration adjustment and dedicated processing cycle development are available on demand

CNC Turning

CNC Milling

CNC Laser Cutting

Our CNC turning and milling services canproduce highly accurate and complex partsfrom a variety of materials, including metals,plastics and composites.
Samples: 1-3 Day
Lead time:7-14Day
Machinery Axis: 3,4,5,6
Tolerance:+/-0.01mm
Special Areas :+1-0.002mm
Surface Roughness: Ra 0.1~3.2
supply Ability:200,000Piece/Month.

Our CNC milling capabilities allow us to produce precise and complex components from various materials including aluminum, stainless steel, brass, engineering plastics, and more.
Machinery Axis: 3, 4, 5
Processing Range: Length 5–1500mm
Tolerance: ±0.01mm
High Precision Zones: ±0.002mm
Surface Finish: Ra 0.4–0.05
Materials: Metals, Plastics, Composites
Quality Assurance: In-house QC team, Full inspection, Process FMEA, CPK control

Our CNC laser cutting services deliver fast, clean, and precise cuts on sheet metals and non-metal materials. Ideal for prototypes, custom parts, and high-volume production with minimal material waste.
Cutting Thickness: 0.1 – 25mm (material-dependent)
Materials: Stainless Steel, Carbon Steel, Aluminum, Brass, Acrylic, Plastics
Cutting Tolerance: ±0.1mm
Max Sheet Size: Up to 3000 × 1500mm
Edge Quality: Smooth, burr-free finish
Applications: Enclosures, signage, brackets, precision plates