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The OTC AW18 is a water-cooled argon arc welding torch, available in two standard lengths: 4 meters and 8 meters. This guide provides a detailed exploded view and a complete list of original parts for the AW18 model, helping you quickly identify and order the correct replacement components.
| Symbol | Model | Part Name | Remarks |
|---|---|---|---|
| 1 | H950J00 | Welding gun body | Includes 1-1 and 1-2 |
| 1-1 | H500B04 | Insulator | — |
| 1-2 | H500B05 | Protective cap | — |
| 2 | H950C07 | Tungsten electrode clamp (3.2mm) | Copper tube, 2‑piece split |
| 3 | H950C17 | Tungsten electrode holder (3.2mm) | Copper tube |
| 4 | H21B22 | Nozzle (No.7) | Inner diameter 11mm |
| 5 | 0870-032 | Tungsten electrode | 3.2×150mm, cerium type |
| 6 | H83C00 | Tungsten cap (long) | Includes 6-1 |
| 6-1 | 3570-007 | O‑ring | — |
| 8 | H950E01 | Handle | — |
| Symbol | Model | Part Name | Remarks |
|---|---|---|---|
| 9 | H950E02 | Tube sheath | 4m |
| 10 | H950F00 | Gas hose | 4m |
| 11 | H950G00 | Cooling water pipe | 4m |
| 12 | H21E00 | Welding torch cable tube | 4m |
| 13 | K1108A00 | Welding torch switch | 4m, includes 13-1 and 13-2 |
| 13-1 | K1108C00 | Switch body assembly | — |
| 13-2 | 4730-001 | Connector plug (2P) | — |
| Symbol | Model | Part Name | Remarks |
|---|---|---|---|
| 9 | H951E02 | Tube sheath | 8m |
| 10 | H951F00 | Gas hose | 8m |
| 11 | H951G00 | Cooling water pipe | 8m |
| 12 | H223E00 | Welding torch cable tube | 8m |
| 13 | K1109A00 | Welding torch switch | 8m, includes 13-1 and 13-2 |
| 13-1 | K1108C00 | Switch body assembly | — |
| 13-2 | 4730-001 | Connector plug (2P) | — |
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 TIG torch. Whether you need a single tungsten electrode 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