Machine Comparison
Okuma GP-67N vs Okuma GP-GA-34FII
Okuma vs Okuma · CNC Grinding Machines
Summary
The Okuma GP-67N and the Okuma GP-GA-34FII are both Okuma CNC cylindrical grinders, but they sit at opposite ends of the range and serve different jobs. The Okuma GP-67N is a large machine for heavy rolls and long shafts, offered with 2,150, 2,650, or 3,150 mm (84.65, 104.33, or 124.02 in) between centers. The Okuma GP-GA-34FII is a smaller grinder for shafts and pins, offered in 350 / 650 / 1,000 / 1,500 mm lengths.
Okuma publishes few comparable figures for this pair, but the lengths alone make the point: they do not overlap. The longest Okuma GP-GA-34FII, at 1,500 mm (59.05 in), is shorter than the shortest Okuma GP-67N, at 2,150 mm (84.65 in).
Specifications Comparison
| Specification | Okuma GP-67N | Okuma GP-GA-34FII |
|---|---|---|
| Rapid Traverse | 12 m/min (472 ipm) | 16 m/min (630 ipm) ▲ |
| Distance Between Centers | 2,150, 2,650, or 3,150 mm (84.65, 104.33, or 124.02 in) | 350 / 650 / 1,000 / 1,500 mm (13.78 /25.60 / 39.4 / 59.05 in) |
Advantages
Okuma GP-67N
- Up to 3,150 mm (124.02 in) between centers against a longest 1,500 mm (59.05 in)
- Built for large rolls and heavy shafts beyond the smaller machine's range
Okuma GP-GA-34FII
- Four bed lengths from 350 mm (13.78 in) to 1,500 mm (59.05 in), for short pins through mid-length shafts
- Suited to finish grinding with light stock on shafts and pins
Verdict
Part length decides this one. Work that needs 2,150 mm (84.65 in) or more between centers, such as large rolls and heavy shafts, belongs on the Okuma GP-67N. Pins and shafts that fit within 1,500 mm (59.05 in), especially finish grinding with light stock, belong on the Okuma GP-GA-34FII, which can be ordered as short as 350 mm (13.78 in). A shop weighing one of these grinders is rarely weighing the other.