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JRXM-75 Precision Rotary Surface Grinder
Application
Designed for high-precision surface milling and grinding of optical glass, quartz, sapphire, ceramics, silicon wafers, precision molds, and other hard & brittle materials.
Widely used in optics, semiconductor, electronics, and precision mechanical industries for high-flatness planar processing.
Technical Specifications
| Machining Capacity | |
| Item | Specification |
| Allowable Range of Workpiece Diameter | Φ750 mm |
| Allowable Range of Workpiece Thickness | Max. 185 mm (Distance from lower end of grinding wheel to worktable surface) |
| Grinding Wheel Assembly | |
| Item | Specification |
| Grinding Wheel Shape | Cup-Shape Grinding Wheel |
| Grinding Wheel Diameter | Φ400 mm |
| Grinding Wheel Speed | 1445 rpm (50 Hz) |
| Peripheral Speed | Approx. 30 m/s (50 Hz) |
| Grinding Head Section | |
| Item | Specification |
| Max. Vertical Travel | 210 mm |
| Rapid Up/Down Speed | Approx. 75 mm/min (50 Hz) |
| Fine Feed Speed | 0.005 – 0.48 mm/min |
| Feed per Handwheel Revolution | Approx. 0.2 mm |
| Feed per Handwheel Graduation | Approx. 0.002 mm |
| Worktable Section | |
| Item | Specification |
| Worktable Diameter | Φ750 mm |
| Worktable Rotation Speed | Variable Speed 1 – 22 rpm (60 Hz) |
| Reduction Ratio | 1:30 |
| Lubrication Mode | Periodic Oil Filling |
| Magnetic Chuck Section | |
| Item | Specification |
| Electromagnetic Chuck Diameter | Φ750 mm (Center Φ100 Non-magnetic Zone) |
| Magnetic Pole Pitch | Wide Pole 4 + 12 |
| Magnetic Holding Force | 10 kg/cm² |
| Motor Power | |
| Item | Specification |
| Spindle Motor (with Inverter) | 11 kW, 6P |
| Rapid Lift Motor | 0.25 kW, 4P |
| Feed Servo Motor | 0.75 kW |
| Feed Lift Reducer | 1:40 |
| Worktable Drive Motor (with Inverter) | 2.2 kW, 4P |
| Worktable Reducer | 1:30 |
| Coolant Pump Motor | 0.45 kW |
| Total Installed Power | Approx. 13 kW |
| Electrical System | |
| Item | Specification |
| Input Power Supply | 380 V / 50 Hz |
| Control Circuit Voltage | 220 V / 50 Hz |
| Electric Control Cabinet | Mounted on lower part of machine body |
| HMI Touch Panel | 10.2 inch touch screen |
| Other Options | Confirmed by mutual negotiation |
| Machine Dimensions | |
| Item | Specification |
| Weight | 4000 kg |
| Dimensions (L × W × H) | 1950 × 1150 × 2450 mm |
| Coolant Tank Dimensions (L × W × H) | 1200 × 610 × 600 mm (with wheels) |
| Coolant Tank Capacity | 280 L |
| Required Floor Space | 2000 × 2000 mm |
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Ji Rui Technology (Guangxi) Co., Ltd.
Ji Rui Technology is a high-tech enterprise specializing in high-end intelligent equipment for precision optics
and semiconductors, providing one-stop full-chain process solutions integrating R&D, manufacturing, and global
supply.
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