T300 Extreme Curve Seam Welder for Inflatables

Airtight and waterproof seams for the toughest applications

Miller Weldmaster’s T300 Extreme Curve produces airtight and waterproof seams for 2D and 3D inflatables. Discover how the T300 Extreme Curve hot air and hot wedge welding machine can help you create seams for uniquely shaped inflatables.

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The T300 Extreme Curve machine creates seams with curves or custom edges, for uses such as white-water rafts, military attack boats, airplane escape chutes, inflatable bounce houses and tents and more. The T300 Extreme Curve machine is portable, only requires one-man operation and is adaptable to configure a variety of seams.

We’re known for the longest-lasting machines.

The T300 Extreme Curve is built for multiple-shift production, and with its solid-steel design, this machine can last for multiple decades.

T300 Extreme Curve seam welding machine

Numbers marking features of the T300 Extreme Curve seam welder

Features and Benefits

  1. Quick-setting recall with touch screen and recipe storage of 25 memory settings
  2. Increased product efficiency with dual arms to configure straight and curved seams
  3. Quick, repeatable, precision-head adjustments
  4. Available in hot-air, hot-wedge or both for product versatility
  5. Quick, easy guide change for multiple seam configurations



Technical Specifications

Power Requirements:
208-240 Volts – Single Phase -25 Amperes
380-400 Volts – Single Phase – 16 Amperes

Air Requirements:
100 PSI @ 2 CFM

Power Consumptions:

Maximum Temperature:
Hot Air: 730o C – Hot Wedge: 450o C

Throat Width:
1m (300cm)

Width: 600mm
Length: 1.5m
Height: 1.5mm
Weight: Approx. 231KG

Seam Width:
10 to 50mm (1/2” to 2”)**

Welding Cycle:
Up to 30m/min (100ft/min)*

*Depending on the application, the seam width, and the type of material used
**Additional guides might be necessary

Download Spec Flyer 


Professional Installation and Training

Trust Miller Weldmaster to get you started!

  1. A Miller Weldmaster certified field service engineer will contact you to schedule installation and training at your facility.
  2. We provide you with everything you need to know to get your team ready for installation and training.
  3. Your staff will receive extensive instruction on welding equipment operation and maintenance and how to produce your product.

Most of our customers are making finished products by the end of the first day.

Download Pre-Install Document



We’re committed to you and your business. The Miller Weldmaster service and resolution center is staffed with our field service engineers for fast response time.


“To ensure we offer the highest of quality and best possible service we rely on equipment which we receive from Miller Weldmaster.” – Aire Inflatables


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