Machine Comparison
Makino G5 vs Makino G7
Makino vs Makino · CNC Grinding Machines
Summary
The Makino G5 and Makino G7 are grinding and milling centers for turbine components, and they share most of their figures: a 250 mm (9.8 in) pallet, a 120 kg (265 lb) workpiece rating, a 12,000 rpm spindle and 60 tools. The G5 rapids at 48,000 mm/min (1,890 ipm); the G7 lists the same for X and Y and 43,000 mm/min (1,693 ipm) for Z.
The difference is working space. The G7 has 690 mm (27.2 in) of X, 650 mm (25.6 in) of Y and 730 mm (28.7 in) of Z travel against 520 mm (20.5 in), 560 mm (22.0 in) and 600 mm (23.6 in) on the G5. The G5 is aimed at small aerospace and turbine parts finished in one setup; the G7 at turbine blade and vane root-form grinding in nickel-based alloys.
Specifications Comparison
| Specification | Makino G5 | Makino G7 |
|---|---|---|
| X-Axis Travel | 520 mm (20.5 in) | 690 mm (27.2 in) ▲ |
| Y-Axis Travel | 560 mm (22.0 in) | 650 mm (25.6 in) ▲ |
| Z-Axis Travel | 600 mm (23.6 in) | 730 mm (28.7 in) ▲ |
| Pallet Size | 250 mm (9.8 in) | 250 mm (9.8 in) |
| Max Table / Workpiece Load | 120 kg (265 lb) | 120 kg (265 lb) |
| Max Spindle Speed | 12,000 rpm | 12,000 rpm |
| Tool Capacity | 60 tools | 60 tools |
| Rapid Traverse | 48,000 mm/min (1,890 ipm) | 48,000 mm/min (X,Y) & 43,000 mm/min (Z) (1,890 ipm (X,Y) & 1,693 ipm (Z)) |
Advantages
Makino G5
- Same 12,000 rpm spindle, 60 tools and 120 kg rating in a smaller envelope for small aerospace parts
- Suited to shops replacing a separate grinder and machining center for smaller turbine parts
Makino G7
- 690 mm (27.2 in) of X travel against 520 mm (20.5 in)
- 650 mm (25.6 in) of Y travel against 560 mm (22.0 in)
- 730 mm (28.7 in) of Z travel against 600 mm (23.6 in)
Verdict
Choose by part envelope. The Makino G5 suits small turbine and aerospace parts with ground and milled features that fit 520 x 560 x 600 mm of travel. The Makino G7 suits larger turbine blades and vanes, where 690 x 650 x 730 mm of travel gives room for root-form grinding and milling in one setup. Spindle, tools, pallet and the 120 kg rating are the same, so travel is the deciding figure.