This page provides a detailed reference for the OTC AII-B4L robot exploded view. The AII-B4L is the long-arm version of the popular AII-B4 model, widely used in arc welding automation. Below is a breakdown of parts by joint axis, referencing the exploded diagram above.

① AC Servo Motor – Part No. W-L02150
② RV Reducer – Part No. W-L02116
③ Grease – Part No. 100-0624
④ AC Servo Motor – Part No. W-L02152
⑤ RV Reducer – Part No. W-L02117
③ Grease – Part No. 100-0624
① AC Servo Motor – Part No. W-L02150
⑥ RV Reducer – Part No. L10725G00
③ Grease – Part No. 100-0624
⑦ AC Servo Motor – Part No. W-L02148
⑧ Harmonic Reducer – Part No. W-L02034
⑨ Grease – Part No. 2670-052
⑩ & ⑪ Grease – Part No. 2670-017
⑦ AC Servo Motor – Part No. W-L02148
⑫ Harmonic Reducer – Part No. L10725H00
⑬ Belt – Part No. W-L02051
⑭ Grease – Part No. 2670-017
⑨ Grease – Part No. 2670-052
⑮ AC Servo Motor – Part No. W-L02147
⑯ Harmonic Reducer – Part No. W-L02036
⑭ Grease – Part No. 2670-015
⑰ Grease – Part No. 2670-053
⑩ & ⑪ Grease – Part No. 2670-017
(1) Rear body to upper arm – Part No. L10525C00
(2) J5 & J6 axes (upper arm) – Part No. L10525D00
(3) J5 & J6 axes (upper arm) – Part No. L10525E00
(4) J6 axis – Part No. L10470H00
J5 Axis Assembly – Part No. L10470C00
J6 Axis Assembly – Part No. L10470B00
Power Cable (inside J1) – Part No. L10485000
Power Cable (from J2 to upper arm) – Part No. L10485S00
⑱ Battery – Part No. 100-2147
All parts listed are genuine OTC Daihen, ensuring perfect fit and long‑term reliability for your AII-B4L robot.
We are an OTC-authorized agent, supplying original parts and assemblies for all OTC welding robots including the AII-B4L.
✅ 100% Genuine
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OTC Daihen AII-B4L (A2-B4L) Welding Robot Parts – All part numbers are based on official OTC documentation.
* Product images are for reference; actual parts may vary slightly by batch.
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