Machine Comparison
JTEKT e-420H vs Junker JUMAT 3S
JTEKT vs Junker Group · CNC Grinding Machines
Summary
The JTEKT e-420H from JTEKT and Junker JUMAT 3S from Junker Group 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 | Junker JUMAT 3S |
|---|---|---|
| Control | JTEKT TOYOPUC | Siemens Sinumerik 840D sl with Junker overlay |
| Grinding Type | CNC cylindrical (OD, ID, face) | OD/ID Cylindrical (CBN/Diamond high-speed) |
| Machine Weight | 5,000 kg (11,023 lb) approx. | 7,500 kg (16,535 lb) ▲ |
| Price Range | $250,000 - $400,000 (new) ▲ | $350,000 - $500,000 |
Advantages
JTEKT e-420H
- More competitive pricing at $250,000 - $400,000 (new) compared to $350,000 - $500,000
- Backed by JTEKT's dealer and service network for parts and support
- Automotive manufacturers grinding crankshafts, camshafts, and transmission components
Junker JUMAT 3S
- Superior machine weight at 7,500 kg (16,535 lb) vs 5,000 kg (11,023 lb) approx.
- Backed by Junker Group's dealer and service network for parts and support
- Automotive powertrain manufacturers grinding camshafts, crankshaft journals, transmission shafts, and rotor components at production volumes
Verdict
This is a close matchup. The JTEKT e-420H and Junker JUMAT 3S 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.