Machine Comparison
Okuma MA-4000H vs Okuma MA-500HII
Okuma vs Okuma · Horizontal Machining Centers
Summary
The Okuma MA-4000H and Okuma MA-500HII are both from Okuma's horizontal machining centers lineup, making this a common upgrade or lineup decision for shops already invested in the Okuma ecosystem. The Okuma MA-4000H leads in max spindle speed (15,000 RPM (20,000 / 12,000 RPM optional) vs 6,000 RPM). The Okuma MA-4000H leads in tool capacity (48 tools (up to 340 optional) vs 40 tools). The Okuma MA-4000H leads in spindle power (38/18.5 kW (40%ED/continuous) (51/25 hp) vs 30/22 kW (10 min/continuous) (40/30 hp)). These machines are closely matched across most specifications, making the decision more about specific feature priorities, dealer support, and your existing shop ecosystem than raw spec advantages. Both machines are proven performers in production environments and represent solid investments for shops in the market for a horizontal machining center.
Specifications Comparison
| Specification | Okuma MA-4000H | Okuma MA-500HII |
|---|---|---|
| Max Spindle Speed | 15,000 RPM (20,000 / 12,000 RPM optional) ▲ | 6,000 RPM |
| Spindle Power | 38/18.5 kW (40%ED/continuous) (51/25 hp) ▲ | 30/22 kW (10 min/continuous) (40/30 hp) |
| Tool Capacity | 48 tools (up to 340 optional) ▲ | 40 tools |
| Control | Okuma OSP-P500M | Okuma OSP-P500M |
| Pallet Size | 400 x 400 mm (15.7 x 15.7 in) | 500 x 500 mm (19.7 x 19.7 in) ▲ |
| Max Workpiece Size | ø630 x 900 mm (ø24.8 x 35.4 in) | ø800 x 1,000 mm (ø31.5 x 39.4 in) ▲ |
| Spindle Taper | No. 40 (BT40) | No. 50 |
| Price Range | $300,000 - $450,000 ▲ | $350,000 - $500,000 |
Advantages
Okuma MA-4000H
- Higher maximum spindle speed of 15,000 RPM (20,000 / 12,000 RPM optional) enables faster cutting on aluminum and non-ferrous materials
- More spindle power at 38/18.5 kW (40%ED/continuous) (51/25 hp) for aggressive material removal in harder materials
- Larger tool magazine with 48 tools (up to 340 optional) capacity reduces manual tool changes on complex parts
- More competitive pricing at $300,000 - $450,000 compared to $350,000 - $500,000
Okuma MA-500HII
- Superior pallet size at 500 x 500 mm (19.7 x 19.7 in) vs 400 x 400 mm (15.7 x 15.7 in)
- Superior max workpiece size at ø800 x 1,000 mm (ø31.5 x 39.4 in) vs ø630 x 900 mm (ø24.8 x 35.4 in)
- Backed by Okuma's dealer and service network for parts and support
- Steel and cast iron production shops where No. 50 taper rigidity directly improves surface finish and tool life under heavy cutting loads
Verdict
This is a close matchup. The Okuma MA-4000H and Okuma MA-500HII trade advantages across different specifications, making neither a clear winner on paper alone. Your decision should come down to practical factors: which dealer is closer, which control system your operators already know, what tooling ecosystem you're invested in, and which machine's specific strengths match your highest-volume work. Get quotes on both, run test cuts with your actual parts if possible, and factor in long-term service and support costs.