The OTURN CNC crankshaft grinding machine grinds crankshafts and main journals to micrometer-level tolerances. It shapes the surfaces to match bearing contact requirements, ensuring correct oil film thickness and stable rotation in the engine.
The machine handles crankshaft journals, crank pins, and bearing surfaces in one setup. It removes material from wear, scoring, or distortion and restores each surface to its specified size and roundness. You can swap tooling and fixtures quickly to suit different crankshaft lengths, diameters, and designs, making the machine effective for both small repair jobs and continuous production lines.
The CNC control system sets wheel speed, table feed, and infeed steps with repeatable accuracy. A rigid bed casting and balanced wheel head keep vibration low, which helps maintain geometry over long runs and extends wheel service intervals. The machine is used in aerospace, automotive, marine, energy, and oil & gas industries where every component must meet tight dimensional and surface finish standards.
Contact us today to see how our CNC Crankshaft Grinding Machine can improve your machining accuracy and productivity.
Precision Grinding Capability
The CNC crankshaft grinding machine holds crankshaft journals and pins within micrometer-level tolerances. The CNC system controls wheel feed, table travel, and infeed depth with repeatable accuracy. The CNC crankshaft grinding machine uses hardened and ground guideways with precision-balanced spindles to maintain consistent surface geometry and finish across the entire workpiece.
High-Throughput Design
The integrated locking system keeps the crankshaft aligned during grinding and reduces the need for rework. The design shortens setup time and cuts cycle time per piece, making the machine suitable for both small batches and continuous production.
Configurable for Different Workpieces
The machine adjusts wheel size, centers distance, and steady-rest placement to match crankshafts of different lengths, diameters, and counterweight designs. Optional radius dressers and automatic wheel balancers expand the machine’s capability to meet strict production and tolerance requirements.
Multi-Speed Belt Drive
The CNC crankshaft grinding machine uses a belt-driven headstock with three selectable speeds. Operators can match the spindle speed to the material and grinding process for better control of cutting conditions.
Robust Mechanical Design for Stability
The machine’s headstock and tailstock use a cross chuck structure with a friction clutch transmission chain. This design lets the operator adjust clamping easily and keeps rotation smooth during grinding.
Automatic Lubrication and Rapid Tailstock Movement
The machine’s automatic oil pump circulates lubricant to the bed guide rails and grinding wheel frame rails to reduce wear and keep motion steady. An optional air cushion on the tailstock moves it forward and backward quickly, which shortens workpiece loading and setup time.
The wheel head has an anti-friction coating to reduce wear during movement. Adjustable bearings support the wheel head to ensure stable and precise motion, maintaining grinding accuracy over time. Both the headstock and tailstock use sealed and greased bearings that require minimal maintenance. This design helps reduce downtime and keeps the machine running smoothly.
The CNC crankshaft grinding machine uses hydraulic controls for the wheel head and table. This setup speeds up machine setup and grinding operations. The work heads require only two keys to complete shifting, centering, and clamping. Operators can quickly switch between chucks and centers. The indexed chucks rotate 360 degrees, allowing the machine to handle different crankshaft shapes efficiently.
The CNC crankshaft grinding machine features a 4-way adjustment system for fast and accurate setup. Operators can select indexing angles of 30° or 72° to match different crankshaft designs. A headstock manometer continuously monitors dynamic balance, helping maintain consistent grinding quality throughout the process.
The CNC crankshaft grinding machine includes a heavy-duty setup for machining large crankshafts. It features an in-process measuring gauge for real-time monitoring and heavy-duty steady rests to support long workpieces firmly. Extra counterweights improve machine stability during grinding.
Operating the CNC crankshaft grinding machine requires a full understanding of its workflow and limits. By following these steps, you can operate the machine safely and accurately.
- Know Your Machine
Operators must understand the machine’s operation sequence and performance limits. Never exceed these limits.
- Pre-Operation Checks
Check handles, travel stops, and switches, so that you can confirm they are intact and fastened for security. Add lubricating oil as specified in the lubrication chart.
- Lubrication and Checking the System
Start the lubrication oil pump and night pressure pump motor. Check and adjust the pressures of system as needed. Rotate the grinding wheel shaft by hand to make sure that it turns freely.
Move the grinding head crossfeed to confirm the positions of the grinding wheel, diamond pen, and workpiece. Run the worktable for 15 – 20 minutes to purge air from cylinders and remove crawl. Adjust stroke and speed settings accordingly.
- Grinding Wheel Safety
Inspect the grinding wheel for cracks before every use. Do not use cracked wheels or wheels without protective covers. Avoid hitting the workpiece against any surface during operation. Replace blunt diamonds promptly.
- Proper Grinding Practices
Choose grinding amounts carefully. Do not stop the grinding wheel while it is still in contact with the workpiece. Adjust the feeding position according to the workpiece size and bumping blocks on the workbench to maintain accuracy.
- Routine Maintenance
Check lubrication on guide rails before starting work. Begin production after confirming that there are sufficient lubrication. Regularly inspection and adjustment of the tightness of the workpiece shaft belt is essential.
- Grinding Wheel Replacement
Please check the new grinding wheel for cracks before installation. Perform two balancing test runs after installation and dressing. Proceed only when the wheel is smooth and safe enough to operate.
- Shutdown Procedure
Reset the machine at the end of operation. Close the cooling nozzle for 2–3 minutes, then turn off the grinding head and workpiece motors. After the grinding head stops, shut down the hydraulic oil pump, lubricating oil pump, and cooling pump.
- Post-Operation Cleaning and Records
Thoughly clean the machine after use. Cut off the power supply and complete the spot check record to keep proper maintenance and accountability.
Following these steps, you will achieve safe operation, extend machine life, and maintain grinding quality. Remember that it’s essential to train properly and strict adhere to procedures when operating.
The CNC crankshaft grinding machine handles automotive, diesel engine, marine, and industrial crankshafts. It supports various materials and parts of different sizes to meet diverse machining needs.
The machine uses an advanced CNC control system for easy programming of grinding sequences, speeds, and feeds. It allows flexible customized options to fit different crankshaft shapes and production volumes.
In addition to steel, the machine grinds cast iron, aluminum alloys, and other common crankshaft materials. You can manufacture parts with different hardness levels and surface finish requirements with our machine.
The CNC crankshaft grinding machine has splash guards to shield operators from coolant and debris. It includes automatic lubrication systems which is beneficial for smooth operation. Protective covers cover all moving parts to prevent from accidents when use.
The machine includes universal chucks to hold different workpieces. It has a set-up indicator and a steady rest designed for long crankshafts. A crank centering V-gauge helps position parts accurately.
Radius dressers and front & side dressers keep the grinding wheel’s shape. A wheel balancing arbor reduces vibration. The package also contains a grinding wheel and hub ready to use, a lifting hook to handle heavy parts, and a coolant system with splash guards.
The machine comes with a full set of tools and an operating manual that guides installation and maintenance.
- You can access online help 24/7 for any issues or questions.
- Regular maintenance services keep the machine working well.
- We provide repair and part replacement using genuine components.
- Software and firmware updates improve performance.
- We deliver professional courses on operation and upkeep to extend machine life.
