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CO₂ / MAG / MIG Standard Digital Inverter OTC DAIHEN® Welbee Series

OTC Welbee WB-M350 & WB-M500 Digital Inverter Welding Machines

Heavy-Duty Multi-Platform Series • 350A & 500A High-Performance Core

The OTC Welbee WB-M350 and WB-M500 are state-of-the-art digital inverter welding machines precision-engineered for industrial CO₂, MAG, and MIG welding applications. Built upon a unified smart processing framework, these platforms deliver clean bead aesthetics, robust current efficiency, and intuitive parameter control configurations capable of sustaining high-duty manufacturing environments.

Key Features

Advanced Inverter Waveform: Incorporates dedicated high-speed Welbee processor control circuits to maintain absolute arc stability and reduce post-weld splatter generation.
Optimal Current Distribution: Delivers a highly consistent wire feeding profile and deep structural fusion thickness across multi-gauge raw plates.
Digital Turbo Start Sequence: Enhances initial arc-striking rates instantly, preventing wire stubbing and initial cold-lap weld defects.
User-Friendly System Interface: Outfitted with responsive digital selection knobs alongside clear LED diagnostic displays for straightforward monitoring under harsh workshop lighting.

Operational Advantages

Enhanced Job-Site Productivity: High sustained duty cycle metrics minimize operator down-time during repetitive multi-pass weld configurations.
High Application Versatility: Native support for multiple wire diameters and structural base materials allows smooth parameter adjustments between jobs.
Energy-Efficient Power Delivery: Optimized internal electrical drawing profiles drastically decrease empty load consumption rates.
Integrated Parameter Storage: Allows immediate lock-in and quick retrieval of recurring operational configurations, standardizing output quality across shifts.

Technical Specifications Comparison Matrix

Specification Parameters	WB-M350 Specification	WB-M500 Specification
Input Voltage	3-Phase, 380V / 400V / 415V	3-Phase, 380V / 400V / 415V
Output Current Range	30 – 350 A	30 – 500 A
Output Voltage Range	12 – 36 V	12 – 45 V
Rated Duty Cycle	60%	60%
Applicable Wire Sizes	0.8 – 1.2 mm	1.0 – 1.6 mm
Dimensions (W x D x H)	395 x 710 x 640 mm	395 x 710 x 750 mm
Machine Weight	51 kg	63 kg
Compatible Wire Feeder	CM-7402 / CMV-7402	CM-7402 / CMW-742