OTC DAIHEN FD-VC4 Welding Cobot Review: Specs and Uses of the Collaborative Welding Robots
Updated: 7 days ago

OTC DAIHEN's welding cobots bring the company's arc welding know-how to collaborative arms that operators teach by hand. The manufacturer does not publish a price. This review covers its specifications, features and uses.
Quick Verdict
Three cobots make up the range. The FD-VC4 is the base model with an independently articulated arm, vibration-restraining control and a built-in mechanical shock sensor; the FD-VC4L adds reach for larger parts and supports CO2/MAG, TIG and ultra-low-spatter welding; the FD-VC8 carries 8 kg with 1,567 mm reach and adds a tablet pendant. All are built entirely from DAIHEN components and connect digitally to DAIHEN power sources. The spec tabs on the US page are empty, so payload and reach are given only for the FD-VC8.
OTC DAIHEN FD-VC4 Welding Cobot at a Glance
Type: Collaborative welding robot
FD-VC8 payload: 8 kg
FD-VC8 reach: 1,567 mm
Programming: Hand guiding
Welder link: Digital connection to DAIHEN power sources
Price: on request
OTC DAIHEN FD-VC4 Welding Cobot Technical Specifications
The table below lists what the manufacturer states.
Specification | FD-VC4 | FD-VC4L | FD-VC8 |
Payload | Not stated | Not stated | 8 kg |
Reach | Not stated | Extended (value not stated) | 1,567 mm |
Programming | Hand guiding | Hand guiding | Hand guiding, tablet pendant |
Welding processes | Most welding applications | CO2/MAG, TIG, ultra-low spatter | High-precision welding |
Shock sensor | Built-in mechanical | Not stated | Not stated |
DAIHEN's US page leaves the specification tabs empty; payload and reach are stated only for the FD-VC8.
Design and Build Quality
Vibration-restraining control smooths motion; all components including drives come from DAIHEN.
Software and Integration
Hand-Guided Teaching
Operators move the arm by hand to set points.
Tablet Pendant
Offered with the FD-VC8.
OTC DAIHEN FD-VC4 Welding Cobot Applications and Use Cases
Small Batch Welding
Quick teaching for changing parts.
Larger Parts
FD-VC4L and FD-VC8 with extended reach.
TIG and Low Spatter
Supported on the FD-VC4L.
OTC DAIHEN FD-VC4 Welding Cobot Price and Value
OTC DAIHEN does not publish a price for the OTC DAIHEN FD-VC4 Welding Cobot; it is quoted on request.
For the company behind the product, read the DAIHEN (OTC DAIHEN) Company Profile: History, Businesses, Financials and Stock.
Pros and Cons
Pros
Built by a welding specialist
Digital welder integration
Hand guiding
Three reach options
Cons
Most specs missing on the US page
Price on request
No published price
Who Should Buy the OTC DAIHEN FD-VC4 Welding Cobot?
It fits job shops and fabricators wanting a collaborative welding cell from a welding equipment maker.
OTC DAIHEN FD-VC4 Welding Cobot FAQ
How much does the OTC DAIHEN FD-VC4 Welding Cobot cost?
OTC DAIHEN does not publish a price for the OTC DAIHEN FD-VC4 Welding Cobot; it is quoted on request.
What is the OTC DAIHEN FD-VC4?
A collaborative welding robot from OTC DAIHEN.
What cobot models exist?
FD-VC4, FD-VC4L and FD-VC8.
How much can the FD-VC8 carry?
8 kg.
What is the FD-VC8 reach?
1,567 mm.
How is it programmed?
By hand guiding; the FD-VC8 also has a tablet pendant.
Which welding processes are supported?
The FD-VC4L supports CO2/MAG, TIG and ultra-low-spatter welding.
Does it work with DAIHEN welders?
Yes, through a digital connection.
Specifications are based on manufacturer information and may change.





