Machine Comparison
Okuma GP-GA-36FII vs Okuma GP-GA-44FII
Okuma vs Okuma · CNC Grinding Machines
Summary
The Okuma GP-GA-36FII and Okuma GP-GA-44FII 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-GA-44FII leads in x travel (305 mm (12.01 in) vs 275 mm (10.83 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 GP-GA-36FII | Okuma GP-GA-44FII |
|---|---|---|
| X-Axis Travel | 275 mm (10.83 in) | 305 mm (12.01 in) ▲ |
| Z-Axis Travel | 1,050 mm (41.34 in) ▲ | 525 mm (20.67 in) |
| Control | Okuma OSP-P300G | Okuma OSP-P300G |
| Max Grinding Diameter | 340 mm (13.4 in) | 400 mm (15.7 in) ▲ |
| Distance Between Centers | 1,000 mm (39.4 in) ▲ | 500 mm (19.7 in) |
| Grinding Wheel Size | 510 x 75 mm (20.1 x 3.0 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 | 15 m/min (591 ipm) | 15 m/min (591 ipm) |
| Workhead Speed | 10 - 400 RPM | 10 - 350 RPM |
| Workhead Center | MT5 | MT5 |
| Swivel Angle | +/- 6° | +/- 6° |
| Machine Weight | 7,500 kg (16,535 lb) ▲ | 7,000 kg (15,432 lb) |
| Price Range | $230,000 - $310,000 | $230,000 - $320,000 |
Advantages
Okuma GP-GA-36FII
- Greater z travel of 1,050 mm (41.34 in) accommodates larger workpieces
- Superior distance between centers at 1,000 mm (39.4 in) vs 500 mm (19.7 in)
- Superior machine weight at 7,500 kg (16,535 lb) vs 7,000 kg (15,432 lb)
Okuma GP-GA-44FII
- Greater x travel of 305 mm (12.01 in) accommodates larger workpieces
- Superior max grinding diameter at 400 mm (15.7 in) vs 340 mm (13.4 in)
- Backed by Okuma's dealer and service network for parts and support
- Heavy equipment manufacturers grinding large pump shafts, hydraulic cylinder components, and gear blanks exceeding 300 mm diameter
Verdict
This is a close matchup. The Okuma GP-GA-36FII and Okuma GP-GA-44FII 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.