| The Cylinder Boring and Milling Machine PR7220B vertical fine boring machine is mainly used to bore high accurate holes of cylinder body and engine sleeve and other accurate holes. |
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| PR7220B& PR7220C is mainly used for fine boring high accurate holes of cylinder body and engine sleeve also for other accurate holes, it's can used for milling surface of cylinder. The machine can be used to boring, milling, drilling, reaming. |
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| Structure features |
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| PR7220B |
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| 1. The table longitudinal and latitudinal moving device |
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| 2. The workpiece fast centering device |
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| 3. Boring measuring device |
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| 4. Also provides optional digital readout for the table's longi and lati moving accessories to serve the users |
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| PR7220C |
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| 1. The table longitudinally and latitudinally moving devices |
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| 2. The workpiece fast centering device |
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| 3. Boring measuring device |
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| 4. The table longitudinal moving |
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| 5. Digital read-out device (user quest) |
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| Model: PR7220B/PR7220C |
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| Model |
PR7220B |
PR 7220C |
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| Max. boring diameter |
Φ 200 mm |
Φ 200 mm |
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| Max. boring depth |
500 mm |
500 mm |
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| Spindle cutter head diamenter |
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250 mm |
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| Max. milling area |
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850x 250 mm |
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| Spindle speed range |
53-840rev/min |
53-840rev/min |
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| Spindle feed range |
0.05 -0.20mm /rev |
0.05 -0.20mm /rev |
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| Spindle travel |
710mm |
710mm |
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| Distance from spindle axis to carriage vertical plane |
315mm |
315mm |
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| Table longitudinal travel |
900mm |
1100 mm |
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| Table longitudinal feed speed |
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54,108 mm /min |
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| Table longitudinal move speed |
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1500 mm /min |
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| Table latitudinal travel |
100 mm |
100 mm |
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| Boring dimension accuracy |
IT7 |
IT7 |
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| Milling dimension accuracy |
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| Roundness |
0.005 |
0.005 |
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| Cylindricity |
0.01/300 |
0.01/300 |
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| Boring surface roughness |
Ra1.6 |
Ra1.6 |
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| Milling surface roughness |
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Ra1.6-3.2 |
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| Overall dimensions (L×W×H) |
1588x2210x 2340 mm |
1588x2610x 2350 mm |
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| N.W./G.W. |
3300/ 3800 kg |
3600/ 4000 kg |
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| Packing dimensions (L×W×H) |
1830x1730x 2620 mm |
1830x1730x 2620 mm |
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