The OTC DAIHEN DM Series (DM350 / DM500) represents highly representative fully digital CO₂/MAG gas-shielded welding machines in the industrial manufacturing sector. Relying on OTC’s powerful digital inverter control technology, this series can achieve high-quality welding with extremely low spatter and a highly stable arc across a remarkably wide current range. To facilitate checking and acceptance by procurement managers and workshop equipment engineers, this article details the original standard factory configuration lists for the DM350 and DM500 welders, accompanied by expert selection guides.
1. Welding Expert Guide: How to Choose Between DM350 and DM500?
Before checking specific configurations, enterprises need to select the power source capacity based on actual processing plate thickness to achieve the best Return on Investment (ROI):
- DM-350 (Rated Current 350A): The golden application range is for welding 1.0mm – 6.0mm thin to medium plates. Especially in automotive parts and hardware sheet metal processing, its crisp arc starting and low-spatter characteristics are outstanding. Paired with the 350A-class WT3510 welding torch, the lightweight torch body significantly reduces welder wrist fatigue.
- DM-500 (Rated Current 500A): Specifically designed for medium-to-thick plates over 5.0mm and heavy-duty structural components. Featuring extremely strong penetration and a high-power continuous duty cycle, it is suitable for steel structure plants, shipbuilding, and heavy machinery manufacturing. The standard 500A-class WT5000 welding torch and thickened secondary cables ensure that long-term high-current output will never cause overheating.
2. OTC DAIHEN DM350 Standard Factory Configuration List
This list represents the standard kit for basic manual GMAW with the DM350. All kits come standard with the K5688B00 Analog Remote Control Pendant, allowing welders to finely adjust voltage and current remotely from the workstation.
| NO. | Core Component Name | Original Model/Spec | Std Qty |
|---|---|---|---|
| 1 | Fully Digital Welding Power Source | DM-350 | 1 Unit |
| 2 | Dedicated Wire Feeder | CM-7402 | 1 Unit |
| 3 | GMAW Torch (350A Class) | WT3510-SBD | 1 PC |
| 4 | Gas Flow Meter with Heater | W-198-36V | 1 Set |
| 5 | Secondary Welding Cable (Torch Side) | BKPDT-3802 | 1 PC |
| 6 | Secondary Welding Cable (Ground Side) | BKPDT-3802 | 1 PC |
| 7 | Handheld Remote Control Pendant | K5688B00 | 1 PC |
3. OTC DAIHEN DM500 Standard Factory Configuration List
Targeting high-current heavy industrial environments, the DM500 comprehensively upgrades the accompanying welding torch specifications and the cross-sectional area of the secondary cables (utilizing BKPT-6002 large-gauge copper core cables) to ensure superior conductivity and heat dissipation redundancy.
| NO. | Core Component Name | Original Model/Spec | Std Qty |
|---|---|---|---|
| 1 | Fully Digital Welding Power Source | DM-500 | 1 Unit |
| 2 | Dedicated Wire Feeder | CM-7402 | 1 Unit |
| 3 | GMAW Torch (500A Heavy-Duty) | WT5000-SBD | 1 PC |
| 4 | Gas Flow Meter with Heater | W-198-36V | 1 Set |
| 5 | Thickened Secondary Welding Cable (Torch Side) | BKPT-6002 | 1 PC |
| 6 | Thickened Secondary Welding Cable (Ground Side) | BKPT-6002 | 1 PC |
| 7 | Handheld Remote Control Pendant | K5688B00 | 1 PC |