Okuma GP-GA-44FII

Q: How much does the Okuma GP-GA-44FII cost?

Our best estimate for the Okuma GP-GA-44FII is $230,000 - $320,000. This is an estimate for a cnc grinding machines in this class, not a quote from Okuma; configuration, tooling, automation and installation move the final price substantially. A specific price can be requested at https://machinetoolindex.com/machines/okuma-gp-ga-44fii#price; the request is passed to Okuma or an authorised dealer.

Est. $230,000 - $320,000 Specs verified 2026-10-03 · okuma.com Updated 2026-10-03

Image: okuma.com, Okuma

Key Specifications

Rapid Traverse

16 m/min (630 ipm)

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

455 × 127 mm (18 × 5 in)

rapid traverse x

10 m/min (394 ipm)

rapid traverse z

15 m/min (591 ipm)

How much does the Okuma GP-GA-44FII cost?

Estimated price range

Est.$230,000 - $320,000

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-44FII pairs a 400 mm (15.75 in) grinding diameter with the lighter of the two wheel packages in its range. The wheel is listed at 455 × 127 mm (18 × 5 in) and 75 mm (3 in) wide, and the wheel spindle motor is 7.5 kW (10 hp).

That combination has a clear use. Some parts are large in diameter yet ask for little stock removal: thin flanges, sleeves on an arbor, a narrow seal diameter on a big hub. They need the swing but not a wide, heavily powered wheel, and a 75 mm face gets into gaps a wider wheel cannot enter. At full capacity the work is almost as large as the 455 mm wheel itself, so wheel wear shows up sooner than it would with a larger wheel, and dressing intervals should be planned with that in mind.

For the same swing with a heavy wheel, the GP-GA-47FII lists a 760 × 304.8 mm (30 × 12 in) wheel, a 150 mm (6 in) width and 15 kW (20 hp) with a 22 kW (30 hp) option. One size down, the GP-GA-34FII has this machine's wheel and motor on 300 mm (11.81 in) of grinding diameter.

Workhead speed is 10 - 350 RPM on an MT5 center, and the slow end is there for parts near the 400 mm limit. Distance between centers is 350 / 650 / 1,000 / 1,500 mm (13.78 / 25.60 / 39.4 / 59.05 in). X rapid traverse is 10 m/min (394 ipm).

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	455 × 127 mm (18 × 5 in)
Rapid Traverse X	10 m/min (394 ipm)
Rapid Traverse Z	15 m/min (591 ipm)
Workhead Speed	10 - 350 RPM
Workhead Center	MT5
Rapid Traverse Rate	16 m/min (630 ipm)
Wheel Spindle Motor	7.5 kW (10 hp)
Grinding Wheel Width	75 mm (3 in)

Specifications sourced from okuma.com — verified 2026-10-03

Strengths & Limitations

Strengths

400 mm (15.75 in) maximum grinding diameter with four center distances from 350 to 1,500 mm (13.78 to 59.05 in)
Workhead speed of 10 - 350 RPM, slow enough at the bottom for large diameters
A 75 mm (3 in) wheel width enters narrow gaps between shoulders that the 150 mm (6 in) wheel of the GP-GA-47FII cannot
MT5 workhead center, as on the GP-GA-34FII

Limitations

The 7.5 kW (10 hp) wheel motor limits stock removal on large diameters; the GP-GA-47FII lists 15 kW (20 hp) for the same swing
With a 75 mm (3 in) wheel, long seats must be traverse ground
The workhead tops out at 350 RPM, so small diameters on a mixed part cannot be run at high work speeds
A 455 mm wheel is close in size to a 400 mm (15.75 in) workpiece, which shortens wheel life on the largest parts

Best For

Large-diameter, light-stock work such as flanges and sleeves up to 400 mm (15.75 in) Finish grinding of narrow diameters with a 75 mm (3 in) wide wheel Mixed part lengths, from the 350 mm (13.78 in) bed to 1,500 mm (59.05 in)

Frequently Asked Questions

01 What is the difference between the GP-GA-44FII and the GP-GA-47FII?

Both grind up to 400 mm (15.75 in) on the same four beds. The GP-GA-44FII has a 455 × 127 mm (18 × 5 in) wheel, 75 mm (3 in) wide, with a 7.5 kW (10 hp) motor. The GP-GA-47FII has a 760 × 304.8 mm (30 × 12 in) wheel, 150 mm (6 in) wide, with 15 kW (20 hp) standard and 22 kW (30 hp) optional. The 44 is the finishing machine, the 47 the stock-removal machine.

02 What workhead speed does the GP-GA-44FII have?

The workhead runs at 10 - 350 RPM and its center is MT5. The 10 RPM floor suits parts close to the 400 mm (15.75 in) capacity. The 350 RPM ceiling is the figure to check if the same part also carries small diameters that would normally be ground at higher work speeds.

03 Which center distances are available on the GP-GA-44FII?

Four are listed: 350 / 650 / 1,000 / 1,500 mm (13.78 / 25.60 / 39.4 / 59.05 in). Flange and sleeve work usually fits the short beds, while the 1,500 mm bed turns the machine into a light-duty shaft grinder with a 400 mm (15.75 in) swing.

04 Is the GP-GA-44FII suited to heavy stock removal?

It is not built for it. The wheel spindle motor is 7.5 kW (10 hp) and the wheel is 75 mm (3 in) wide, which suits finishing and light grinding. Where a 400 mm part needs wide plunges or a lot of stock taken off, the GP-GA-47FII and its 15 kW (20 hp) motor are the better match.