Machine Comparison
Okuma GI-10NII vs Okuma GP-GA26W
Okuma vs Okuma · CNC Grinding Machines
Summary
The Okuma GI-10NII and the Okuma GP-GA26W are both Okuma CNC grinders, but they grind opposite surfaces. The Okuma GI-10NII is an internal grinder for bores in bushings, rings and gears. The Okuma GP-GA26W is a cylindrical grinder for the outside diameters of hardened shafts and journals, built around a large wheel for long production runs.
Okuma publishes few comparable figures for this pair: the table holds a single rapid traverse row, and a rapid figure does not decide between a bore grinder and a shaft grinder. The choice follows the feature to be ground, an inside diameter or an outside diameter.
Specifications Comparison
| Specification | Okuma GI-10NII | Okuma GP-GA26W |
|---|---|---|
| Rapid Traverse | 20 m/min (787 ipm) | 30 m/min (1,181 ipm) ▲ |
Advantages
Okuma GI-10NII
- Grinds inside diameters: bores in bushings, rings and gears
- Suited to short-cycle production grinding of bores
Okuma GP-GA26W
- Grinds outside diameters on hardened shafts and journals
- Large grinding wheel that extends the time between wheel changes on long runs
- Suited to plunge grinding of journals
Verdict
Choose by the surface that needs grinding. A shop finishing bores in bushings, rings or gears needs the Okuma GI-10NII, an internal grinder. A shop finishing hardened shafts and plunge grinding journals in long runs needs the Okuma GP-GA26W, whose large wheel stretches the interval between wheel changes. Neither machine substitutes for the other, so the part drawing settles the question before any specification does.