Machine Comparison
Okuma GP-67N vs Okuma GP-GA-34FII
Okuma vs Okuma · CNC Grinding Machines
Summary
The Okuma GP-67N and Okuma GP-GA-34FII are both from Okuma's cnc grinding machines lineup, making this a common upgrade or lineup decision for shops already invested in the Okuma ecosystem. The Okuma GP-67N leads in x travel (340 mm (13.39 in) vs 275 mm (10.83 in)). On paper, the Okuma GP-67N edges ahead with advantages in 7 of the compared specifications, though real-world performance depends heavily on your specific applications and workholding. Both machines are proven performers in production environments and represent solid investments for shops in the market for a cnc grinding machine.
Specifications Comparison
| Specification | Okuma GP-67N | Okuma GP-GA-34FII |
|---|---|---|
| X-Axis Travel | 340 mm (13.39 in) ▲ | 275 mm (10.83 in) |
| Z-Axis Travel | 1,550 mm (61.02 in) ▲ | 525 mm (20.67 in) |
| Control | Okuma OSP-P300G | Okuma OSP-P300G |
| Max Grinding Diameter | 600 mm (23.6 in) ▲ | 340 mm (13.4 in) |
| Distance Between Centers | 1,500 mm (59.1 in) ▲ | 500 mm (19.7 in) |
| Grinding Wheel Size | 510 x 50 mm (20.1 x 2.0 in) | 510 x 75 mm (20.1 x 3.0 in) |
| Wheel Speed Max | 45 m/s (8,858 sfm) | 45 m/s (8,858 sfm) |
| Min Feed Increment | 0.0001 mm (0.000004 in) | 0.0001 mm (0.000004 in) |
| Rapid Traverse X | 10 m/min (394 ipm) | 10 m/min (394 ipm) |
| Rapid Traverse Z | 12 m/min (472 ipm) | 15 m/min (591 ipm) ▲ |
| Workhead Speed | 10 - 300 RPM | 10 - 400 RPM |
| Workhead Center | MT6 ▲ | MT5 |
| Machine Weight | 13,000 kg (28,660 lb) ▲ | 6,000 kg (13,228 lb) |
| Floor Space | 6,200 x 3,000 mm (244 x 118 in) ▲ | 3,800 x 2,500 mm (150 x 98 in) |
| Price Range | $350,000 - $500,000 | $200,000 - $280,000 ▲ |
Advantages
Okuma GP-67N
- Greater x travel of 340 mm (13.39 in) accommodates larger workpieces
- Greater z travel of 1,550 mm (61.02 in) accommodates larger workpieces
- Superior max grinding diameter at 600 mm (23.6 in) vs 340 mm (13.4 in)
- Superior distance between centers at 1,500 mm (59.1 in) vs 500 mm (19.7 in)
- Superior workhead center at MT6 vs MT5
Okuma GP-GA-34FII
- Superior rapid traverse z at 15 m/min (591 ipm) vs 12 m/min (472 ipm)
- More competitive pricing at $200,000 - $280,000 compared to $350,000 - $500,000
- Backed by Okuma's dealer and service network for parts and support
- Automotive manufacturers grinding large-diameter transmission components, differential housings, and bearing journals exceeding 250 mm diameter
Verdict
The Okuma GP-67N holds a spec advantage in this comparison, but the right choice depends on your shop's priorities. If the Okuma GP-67N's strengths in areas like X Travel and Z Travel align with your work, it's the clear pick. The Okuma GP-GA-34FII may still win on dealer proximity, existing tooling compatibility, or specific features that matter most to your applications. Request quotes from both dealers and, if possible, run your actual parts on each machine before deciding.