Okuma GP-GA-47FII
Image: okuma.com, Okuma
Key Specifications
Rapid Traverse
max grinding diameter
distance between centers
grinding wheel size
rapid traverse z
swivel angle
How much does the Okuma GP-GA-47FII cost?
Estimated price range
Our best estimate for a cnc grinding machine in this class — not a quote from Okuma. Configuration moves it a long way.
Overview
The Okuma GP-GA-47FII is the heaviest-wheeled of Okuma's FII cylindrical grinders. It swings 400 mm (15.75 in), carries a wheel listed at 760 × 304.8 mm (30 × 12 in) with a 150 mm (6 in) width, and drives it with 15 kW (20 hp) as standard or 22 kW (30 hp) as an option.
Two neighbours frame it. The GP-GA-44FII has the same 400 mm capacity and the same beds but a 455 × 127 mm wheel, 75 mm (3 in) wide, on 7.5 kW (10 hp). The GP-47N shares the 760 × 304.8 mm wheel size, with a 130 mm (5.12 in) width, but its shortest bed is 2,150 mm (84.65 in). That leaves the GP-GA-47FII as the choice for heavy grinding on parts that fit within 350 / 650 / 1,000 / 1,500 mm (13.78 / 25.60 / 39.4 / 59.05 in) between centers.
A swivel angle of +/- 6° is listed, which covers taper correction and shallow tapers but not steep ones. Okuma's headline figures give no workhead speed or work weight for this model, so both should be requested with a quotation for parts near the 400 mm limit.
Full Specifications
| Parameter | Value |
|---|---|
| Max Grinding Diameter | 400 mm (15.75 in) |
| Distance Between Centers | 350 / 650 / 1,000 / 1,500 mm (13.78 / 25.60 / 39.4 / 59.05 in) |
| Grinding Wheel Size | 760 × 304.8 mm (30 × 12 in) |
| Rapid Traverse Z | 15 m/min (591 ipm) |
| Swivel Angle | +/- 6° |
| Rapid Traverse Rate | 16 m/min (630 ipm) |
| Wheel Spindle Motor | 15 [22] kW (20 [30] hp) |
| Grinding Wheel Width | 150 mm (6 in) |
Specifications sourced from okuma.com — verified 2026-10-03
Strengths & Limitations
Strengths
- 760 × 304.8 mm (30 × 12 in) wheel, 150 mm (6 in) wide, wider than the 130 mm (5.12 in) of the long-bed GP-47N
- 22 kW (30 hp) wheel motor option above the standard 15 kW (20 hp)
- Swivel angle of +/- 6° on a machine with a 400 mm (15.75 in) grinding diameter
Limitations
- The longest bed is 1,500 mm (59.05 in); longer shafts need the GP-47N, which starts at 2,150 mm (84.65 in)
- The 22 kW (30 hp) motor is an option and has to be specified
- A 150 mm (6 in) wheel cannot work between closely spaced shoulders the way the 75 mm (3 in) wheel of the GP-GA-44FII can
Best For
Frequently Asked Questions
01
When the work needs stock removal or wide plunges. Capacity is 400 mm (15.75 in) on both. The GP-GA-47FII has a 760 × 304.8 mm (30 × 12 in) wheel, 150 mm (6 in) wide, on 15 kW (20 hp) or the optional 22 kW (30 hp); the GP-GA-44FII has a 455 × 127 mm wheel, 75 mm (3 in) wide, on 7.5 kW (10 hp).
02
350 / 650 / 1,000 / 1,500 mm (13.78 / 25.60 / 39.4 / 59.05 in). With a 150 mm (6 in) wheel width, the 350 mm bed leaves limited room beside the wheel, so check the part and its workholding against that length before choosing the shortest machine.
03
For shallow tapers and for removing taper from a long shaft, yes: the listed swivel angle is +/- 6°. Steeper tapers fall outside that range. Okuma's headline figures do not describe the swivel in more detail, so confirm the setup for a specific tapered part.
