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This guide covers the OTC water-cooled MIG welding torches: WTW4000‑SBD/MBD/LBD and WTW5000‑SBD/MBD/LBD for carbon steel, and the corresponding WTAW4000‑SBD/MBD/LBD and WTAW5000‑SBD/MBD/LBD for aluminum. The torch lengths correspond to 3.0m (S), 4.5m (M) and 6.0m (L). Below you will find complete specifications, exploded views, and detailed parts lists for these water‑cooled torches.
| Model | WTW4000 (Carbon Steel) WTAW4000 (Aluminum) | WTW5000 (Carbon Steel) WTAW5000 (Aluminum) |
|---|---|---|
| Rated current | 400A (CO₂) / 350A (MAG/MIG) | 500A (CO₂) / 450A (MAG/MIG) |
| Load duration | 100% | |
| Voltage rating | ≤113V | |
| Applicable gas | CO₂ / MAG / MIG | |
| Gas flow | 10–20 L/min | |
| Gas pressure | 0.15 – 0.35 MPa | |
| Torch switch rating | 24 VDC | |
| Applicable wire Ø (mm) | Carbon: 0.8, 0.9, 1.0, 1.2 Aluminum: 1.0, 1.2 | Carbon: 1.2, 1.4, 1.6 Aluminum: 1.2, 1.6 |
| Cable length | 3.0m / 4.5m / 6.0m | |
| Cooling method | Liquid cooled | |
| Applicable standard | GB/T15579.7-2013 (IEC60974-7:2005) | |
The table below lists the main parts with their part numbers and applicability for carbon steel and aluminum.
| No. | Part Name | Part Number | Carbon Steel | Aluminum |
|---|---|---|---|---|
| A | Cone nozzle Ø16mm | SA5216 | ✓ | ✓ |
| B | Contact tip 1.2mm M8×10×30 (copper) | EB3212 | ✓ | |
| Contact tip 1.2mm M8×10×30 (copper, for Al) | EB3212AL | ✓ | ||
| C | Steel wire spring 1.0‑1.2mm×3m | DSR3212-3 | ✓ | |
| Graphite hose 1.0‑1.2mm×3m | DR3412-3 | ✓ | ||
| 1 | Divider (phenolic) | SD5002 | ✓ | ✓ |
| 2 | Contact tip holder M8×25 | SC5001 | ✓ | ✓ |
| 3 | Curved neck 45° | SF5245 | ✓ | ✓ |
| 4 | Hook‑up | EG0001 | ✓ | ✓ |
| 5 | Trigger | EJ0003 | ✓ | ✓ |
| 6 | Front gun case | EHO131 | ✓ | ✓ |
| 7 | Front spring boot | ES0102 | ✓ | ✓ |
| 8 | Cable assembly 3m | SL5030 | ✓ | ✓ |
| 9 | Rear spring boot | YKS0002 | ✓ | ✓ |
| 10 | Rear gun case hole 28.5 | HDH0202-28.5 | ✓ | ✓ |
| 11 | Screw M4×6 | Q210406 | ✓ | ✓ |
| 12 | Gun shell lock nut | DP3001 | ✓ | ✓ |
| 13 | OTC plug (water cooling) | DSUO001 | ✓ | ✓ |
| 14 | O‑ring 3.15×1.8 | Q531518 | ✓ | ✓ |
| 15 | O‑ring 4×1.8 | Q504018 | ✓ | ✓ |
| 16 | Nut | DU3013 | ✓ | ✓ |
| 17 | Water pipe quick connector | SW5131 | ✓ | ✓ |
| 18 | Faucet plug (red) | BW0239R | ✓ | ✓ |
| Faucet plug (blue) | BW0239B | ✓ | ✓ |
The following parts can be selected according to your torch length, wire diameter and application.
| Type | Description | Part Number | Carbon Steel | Aluminum |
|---|---|---|---|---|
| A – Nozzles | Cone nozzle Ø14mm | SA5214 | ✓ | ✓ |
| Cone nozzle Ø15mm | SA5315 | ✓ | ✓ | |
| Straight nozzle Ø20mm | SA5120 | ✓ | ✓ | |
| B – Contact Tips (M8×10×30) | 0.8mm copper | EB3208 | ✓ | |
| 0.9mm copper | EB3209 | ✓ | ||
| 1.0mm copper | EB3210 | ✓ | ||
| 1.6mm copper | EB3216 | ✓ | ||
| 0.8mm chrome‑zirconium copper | EB3208L | ✓ | ||
| 0.9mm chrome‑zirconium copper | EB3209L | ✓ | ||
| 1.0mm chrome‑zirconium copper | EB3210L | ✓ | ||
| 1.2mm chrome‑zirconium copper | EB3212L | ✓ | ||
| 1.6mm chrome‑zirconium copper | EB3216L | ✓ | ||
| 1.0mm copper (for Al) | EB3210AL | ✓ | ||
| 1.6mm copper (for Al) | EB3216AL | ✓ | ||
| C – Liners | Steel wire spring 1.0‑1.2mm×4.5m | DSR3212-4.5 | ✓ | |
| Steel wire spring 1.0‑1.2mm×6m | DSR3212-6 | ✓ | ||
| Steel wire spring 1.2‑1.6mm×3m | DSR5216-3 | ✓ | ||
| Steel wire spring 1.2‑1.6mm×4.5m | DSR5216-4.5 | ✓ | ||
| Steel wire spring 1.2‑1.6mm×6m | DSR5216-6 | ✓ | ||
| Graphite hose 1.0‑1.2mm×4.5m | DR3412-4.5 | ✓ | ||
| Graphite hose 1.0‑1.2mm×6m | DR3412-6 | ✓ | ||
| Graphite hose 1.2‑1.6mm×3m | DR5416-3 | ✓ | ||
| Graphite hose 1.2‑1.6mm×4.5m | DR5416-4.5 | ✓ | ||
| Graphite hose 1.2‑1.6mm×6m | DR5416-6 | ✓ | ||
| 1 | Divider (ceramic) | SD5001 | ✓ | ✓ |
| 2 | Contact tip holder M8×29 | SC5002 | ✓ | ✓ |
All parts listed above are 100% original OTC Daihen spare parts. Our company is an OTC‑designated agent, ensuring you receive authentic components for your water‑cooled welding torches. Whether you need a single contact tip or a complete torch assembly, we are here to help.
📞 Contact Us for Orders / Inquiries
📱 Phone / WeChat / WhatsApp:
+86-180-9663-1656
📧 Email:
ahojotc@gmail.com
* For fastest response, please contact via phone or WhatsApp. You're also welcome to connect on WeChat to exchange knowledge and information about OTC welding machines.
Company: COMPANY：Authorized Distributor of OTC Daihen
Contact person: Contact：Mr.Fang
Mobile phone: Phone：+86-18096631656
Email address: Email：15305667776@163.com
Address: Add：Room 11-704, K Xijia, No. 502, Wangjiang West Road, Hefei, Anhui, China