Machine Comparison
Okuma GP-GA-44FII vs Okuma GP-GA-47FII
Okuma vs Okuma · CNC Grinding Machines
Summary
The Okuma GP-GA-44FII and the Okuma GP-GA-47FII are CNC cylindrical grinders for the same class of large-diameter work, and the table shows them as equals: both are offered with 350 / 650 / 1,000 / 1,500 mm (13.78 / 25.60 / 39.4 / 59.05 in) between centers, and both list a 16 m/min (630 ipm) rapid traverse.
Okuma publishes few comparable figures for this pair, and none of the rows it does publish separates them. The difference is how hard each is meant to grind. The Okuma GP-GA-44FII is the light-stock machine, for finish grinding flanges, sleeves and narrow diameters with a narrow wheel. The Okuma GP-GA-47FII is the heavy one, for plunge grinding and wide bearing seats with a wider wheel face and a larger wheel motor.
Specifications Comparison
| Specification | Okuma GP-GA-44FII | Okuma GP-GA-47FII |
|---|---|---|
| Rapid Traverse | 16 m/min (630 ipm) | 16 m/min (630 ipm) |
| Distance Between Centers | 350 / 650 / 1,000 / 1,500 mm (13.78 / 25.60 / 39.4 / 59.05 in) | 350 / 650 / 1,000 / 1,500 mm (13.78 / 25.60 / 39.4 / 59.05 in) |
Advantages
Okuma GP-GA-44FII
- Suited to light-stock finish grinding of flanges and sleeves
- Narrow wheel for finish grinding of narrow diameters
Okuma GP-GA-47FII
- Suited to heavy plunge grinding
- Wider wheel face for wide bearing seats
- Larger wheel motor for shafts that need heavier cuts
Verdict
Choose by stock removal, since length and rapids are the same. For finish grinding with light stock on flanges, sleeves and narrow diameters, the Okuma GP-GA-44FII is the fit. For heavy plunge grinding and wide bearing seats, choose the Okuma GP-GA-47FII. Either can be ordered with 350 / 650 / 1,000 / 1,500 mm between centers and lists a 16 m/min (630 ipm) rapid traverse.