Machine Comparison
JTEKT e-420H vs Okuma GI-10NII
JTEKT vs Okuma · CNC Grinding Machines
Summary
The JTEKT e-420H from JTEKT and Okuma GI-10NII from Okuma are direct competitors in the cnc grinding machines category. 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 cnc grinding machine.
Specifications Comparison
| Specification | JTEKT e-420H | Okuma GI-10NII |
|---|---|---|
| Control | JTEKT TOYOPUC | Okuma OSP-P300G |
| Machine Weight | 5,000 kg (11,023 lb) approx. ▲ | 3,500 kg (7,716 lb) |
| Price Range | $250,000 - $400,000 (new) | $180,000 - $260,000 ▲ |
Advantages
JTEKT e-420H
- Superior machine weight at 5,000 kg (11,023 lb) approx. vs 3,500 kg (7,716 lb)
- Backed by JTEKT's dealer and service network for parts and support
- Automotive manufacturers grinding crankshafts, camshafts, and transmission components
Okuma GI-10NII
- More competitive pricing at $180,000 - $260,000 compared to $250,000 - $400,000 (new)
- Backed by Okuma's dealer and service network for parts and support
- Bearing manufacturers grinding inner race bores and outer race IDs requiring precision roundness, surface finish, and diameter control
Verdict
This is a close matchup. The JTEKT e-420H and Okuma GI-10NII 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.