MQ8260B/C Heavy-Duty Crankshaft Grinder Machine
Model: MQ8260B/C
Quick Specifications
| Working Area: | 6000×1800×1700mm |
| Spindle Speed: | 30 - 200 (Stepless) |
| Accuracy: | ≤ 0.003mm |
| Tool Capacity: | 12 |
Product Video
Description
The MQ8260B/C is a heavy-duty, high-precision crankshaft grinding machine, purpose-built for finishing the main journals, pin journals, and fillets of large engine crankshafts. It is the core equipment in automotive engine manufacturing, diesel engine rebuilding, and heavy machinery maintenance workshops, delivering exceptional precision and surface finish for both production and remanufacturing needs.
Constructed with a rigid box-type cast iron bed and precision ground V-way guideways, the machine ensures ultimate stability during high-pressure grinding. Equipped with dual headstocks, a high-precision grinding wheel spindle, and a centralized control system, it meets the stringent tolerance requirements of high-performance crankshaft machining. CE/ISO Certified, Factory Direct.
Technical Specifications
| Parameter | Unit | MQ8260B Standard Specification | MQ8260C Standard Specification |
|---|---|---|---|
| Max. Grinding Diameter | mm | 600 | 600 |
| Max. Grinding Length | mm | 1600 / 2000 | 2500 / 3000 |
| Max. Workpiece Weight | kg | 2000 | 2000 |
| Wheel Size (OD×ID×Width) | mm | 750 × 305 × 75 | 750 × 305 × 75 |
| Wheel Spindle Speed | rpm | 980 / 1400 | 980 / 1400 |
| Workpiece Speed Range | rpm | 30 – 200 (Stepless) | 30 – 200 (Stepless) |
| Control System | – | Manual with Mechanical Feed | PLC + Manual |
| Surface Roughness | µm | Ra ≤ 0.4 | Ra ≤ 0.32 |
| Roundness Accuracy | mm | ≤ 0.005 | ≤ 0.003 |
| Net Machine Weight | kg | 6500 / 7500 | 8500 / 9500 |
| Power Supply | – | 3 Phase 380V, 50Hz (Customizable) | 3 Phase 380V, 50Hz (Customizable) |
| Overall Dimensions (L×W×H) | mm | 4200×1800×1700 / 5000×1800×1700 | 5500×1800×1700 / 6000×1800×1700 |
Features
✅ Heavy-Duty Crankshaft Processing
Specifically designed for grinding large crankshafts (up to 600mm diameter), making it ideal for automotive, marine, and diesel engine applications.
✅ Ultra-Precision Control
Achieves roundness accuracy ≤ 0.003mm and surface finish Ra ≤ 0.32µm, meeting OEM standards for engine manufacturing.
✅ Rigid & Vibration-Free Structure
Heavy-duty cast iron bed and reinforced spindle housing eliminate deflection, ensuring long-term machining stability and extending wheel life.
✅ Dual Headstock Design
Stable clamping of large, heavy crankshafts, ensuring concentricity and preventing vibration during grinding.
✅ Versatile Operation Modes
Available with manual mechanical feed or advanced PLC control, suitable for both job shops and high-volume production lines.
✅ Global Export Ready
Fully CE-certified with customizable voltage configurations and complete export documentation, ready for international shipping.
