category: Grinding
Hanji MM7120A / MM7120B High-Precision Horizontal Spindle Rectangular Table Surface Grinding Machine (OEM available)
Key information
Machine overview
The MM7120A and MM7120B models are high-precision horizontal spindle rectangular table surface grinding machines designed for grinding flat surfaces using the periphery of the grinding wheel. They can also grind slots and flange sides using the wheel's end face, achieving high precision and surface finish. These machines are ideal for grinding various precision parts and molds, suitable for use in machining workshops, maintenance shops, and tool rooms.
For detailed specifications, full technical drawings or a quotation, please get in touch and our team of specialists will be happy to assist.
Specification
| Specification | Published data |
|---|---|
| Details | Table Size (W×L) |
| 200×630 mm | Max Grinding Dimensions (W×H×L) |
| 200×320×630 mm | Max Longitudinal Travel |
| 750 mm | Longitudinal Speed (Variable) |
| 2–20 m/min | Max Cross Travel |
| 220 mm | Cross Feed Speed |
| Continuous: 20–1000 mm/min | Intermittent: 0.2–10 mm per stroke |
| T-Slots (Number × Width) | 1×14 mm |
| Max Load Capacity | 104 kg |
| Distance from Spindle Center to Table | Max 445 mm |
| Rapid Vertical Feed Speed | 450 mm/min |
| Spindle Speed | 1500 / 3000 rpm |
| Vertical Micro Feed | 0.002 mm |
| Grinding Wheel Dimensions (D×W×H) | Φ250×25×Φ75 mm |
| Total Power | 5.19 / 5.79 kW |
| Spindle Motor Power | 2.4 / 3 kW |
| Grinding Accuracy | Parallelism of machined surface to base: 0.003 mm per 300 mm |
| Surface Roughness | Ra0.16 μm |
| Net Weight | 2300 kg |
| Gross Weight | 3000 kg |
| Machine Dimensions (L×W×H) | 1900×1205×1750 mm |
| Packing Dimensions (L×W×H) | 2750×1780×2450 mm |
| 4250×1750×2250 mm | Features |
| Cross Slide Structure | : The machine adopts a cross slide design, minimizing thermal deformation and ensuring stable precision. |
| Hydraulic System | : The table's longitudinal movement is driven by a variable vane pump within a closed hydraulic system, ensuring smooth motion, low noise, and minimal oil temperature rise. |
| Cross Feed Mechanism | : The cross slide uses roller guides, with feed driven by an AC variable frequency motor for stepless speed adjustment, allowing fine intermittent and continuous feeds. |
| Spindle Bearings | : The spindle employs small-hole throttling hydrostatic bearings with high rotational accuracy, achieving superior surface finishes. |
| External Oil Tank | : The MM7120B model features an external oil tank for easy maintenance and replacement of the hydraulic system. |
| Standard Accessories | Electromagnetic Chuck: 1 piece |
| Grinding Wheel and Flange: 2 sets | Wheel Balancing Arbor: 1 set |
| Wheel Balancer: 1 piece | Wheel Dresser (without diamond): 1 set |
| Balancing Weights: 5 pieces | Optional Accessories (Additional Cost) |
| Diamond Wheel Dresser: 1 piece | Product details |
Features
- Cross Slide Structure The machine adopts a cross slide design, minimizing thermal deformation and ensuring stable precision.
- Hydraulic System The table's longitudinal movement is driven by a variable vane pump within a closed hydraulic system, ensuring smooth motion, low noise, and minimal oil temperature rise.
- Cross Feed Mechanism The cross slide uses roller guides, with feed driven by an AC variable frequency motor for stepless speed adjustment, allowing fine intermittent and continuous feeds.
- Spindle Bearings The spindle employs small-hole throttling hydrostatic bearings with high rotational accuracy, achieving superior surface finishes.
- External Oil Tank The MM7120B model features an external oil tank for easy maintenance and replacement of the hydraulic system.
- Standard Accessories
- Electromagnetic Chuck 1 piece
- Grinding Wheel and Flange 2 sets
- Wheel Balancing Arbor 1 set
- Wheel Balancer 1 piece
- Wheel Dresser (without diamond) 1 set
- Balancing Weights 5 pieces
- Optional Accessories (Additional Cost)
- Diamond Wheel Dresser 1 piece
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