Machine Comparison
Okuma GI-10NII vs Okuma GP-GA26W
Okuma vs Okuma · CNC Grinding Machines
Summary
The Okuma GI-10NII and Okuma GP-GA26W 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-GA26W leads in x travel (250 mm (9.84 in) vs 140 mm (5.51 in)). These machines are closely matched across most specifications, making the decision more about specific feature priorities, dealer support, and your existing shop ecosystem than raw spec advantages. 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 GI-10NII | Okuma GP-GA26W |
|---|---|---|
| X-Axis Travel | 140 mm (5.51 in) | 250 mm (9.84 in) ▲ |
| Z-Axis Travel | 120 mm (4.72 in) | 1,050 mm (41.34 in) ▲ |
| Control | Okuma OSP-P300G | Okuma OSP-P300G |
| Min Feed Increment | 0.0001 mm (0.000004 in) | 0.0001 mm (0.000004 in) |
| Workhead Speed | 50 - 600 RPM ▲ | 10 - 500 RPM |
| Machine Weight | 3,500 kg (7,716 lb) | 6,500 kg (14,330 lb) ▲ |
| Floor Space | 2,800 x 2,200 mm (110 x 87 in) | 4,200 x 2,400 mm (165 x 94 in) ▲ |
| Price Range | $180,000 - $260,000 ▲ | $200,000 - $280,000 |
Advantages
Okuma GI-10NII
- Superior workhead speed at 50 - 600 RPM vs 10 - 500 RPM
- More competitive pricing at $180,000 - $260,000 compared to $200,000 - $280,000
- Backed by Okuma's dealer and service network for parts and support
- Bearing manufacturers grinding inner race bores and outer race IDs requiring precision roundness, surface finish, and diameter control
Okuma GP-GA26W
- Greater x travel of 250 mm (9.84 in) accommodates larger workpieces
- Greater z travel of 1,050 mm (41.34 in) accommodates larger workpieces
- Superior machine weight at 6,500 kg (14,330 lb) vs 3,500 kg (7,716 lb)
- Superior floor space at 4,200 x 2,400 mm (165 x 94 in) vs 2,800 x 2,200 mm (110 x 87 in)
Verdict
This is a close matchup. The Okuma GI-10NII and Okuma GP-GA26W trade advantages across different specifications, making neither a clear winner on paper alone. Your decision should come down to practical factors: which dealer is closer, which control system your operators already know, what tooling ecosystem you're invested in, and which machine's specific strengths match your highest-volume work. Get quotes on both, run test cuts with your actual parts if possible, and factor in long-term service and support costs.