Hot Air Welding

T300 Extreme Curve Double-Wall

Now Weld Double-wall Fabrics

Miller Weldmaster's T300 Extreme Curve Double-Wall (also known as drop stitch) option is designed to increase production and create air- and watertight seams on a variety of fabrics without glue.
Best For:
  • Athletic Mats
  • Evacuation Slides
  • Paddle Boards
  • Inflatables
Seam Type:
  • Butt Seam Butt Seam
  • Coverstrip Coverstrip
  • Drop Stitch Drop Stitch
  • Fin Prayer Seam Fin Prayer Seam
  • Flat Seam Tube Flat Seam Tube
  • Fold Overlap Fold Overlap
  • Hem Hem
  • Overlap Overlap
  • Tube Tube
  • Extrusion Beading Extrusion Beading
  • Webbing - SEG Webbing - SEG
Features & Options

Features & Benefits

  • Precisely cut patterns with clean, straight edges with the customized, ultrasonic cutter
  • Continuous cutting with the customized blade and chiller
  • The included ultrasonic cutter will cut and temporarily tack the top and bottom panels together, preventing movement during the welding process

Technical Specs

Power Requirements

  • 208-240 Volts - Single Phase -25 Amp.
  • 380-400 Volts - Single Phase -16 Amp.


Air Requirements

  • 5cfm @ 100psi

Power Consumption

  • Approx. 6kW

Maximum Temperature

  • Hot Air: 730˚C (1,346˚F)
  • Hot Wedge: 450˚C (842˚F)

Throat Width

  • 1m (39.4")


  • Width: 0.6m (23")
  • Length: 1.5m (59")
  • Height: 1.5m (59")


  • 231kg (510lb)

Seam Width

  • 10 to 50mm (0.5 - 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

Our Training Process


Step One

Schedule Your Training

A Miller Weldmaster certified field service engineer will contact you to schedule installation and training at your facility.



Installation Preparation

We provide you with everything you need to know to get your team ready for installation and training.



Staff Training

Your staff will receive extensive instruction on welding equipment operation and maintenance and how to produce your product.

Machine Videos

  • Overview & How Tos
  • Training Videos
Welding Drop Stitch Products using Hot Air Technology - T300 Extreme
Hot Air Welding of Drop Stitch for Inflatables, Gym Mats and more l T300Extreme
Hot Air/Wedge Welding Waterproofing for 2D/3D Products - T300 Curve
How to Waterproof non-Weldable Fabrics using Hot Air & Hot Wedge Welding
Hot Air & Wedge Seam Welding Machine, Inflatable Products
Tech Tip I How to Change HMI & PLC Battery I T300 Extreme
Tech Tip I Start Weld Edge Fabric I T300 Extreme
T-SERIES I How to Adjust your Hem Guide I Miller Weldmaster
Tech Tip I How to Tighten your Weld Rollers I T300 Extreme
Changing Heat Systems on T300 I Miller Weldmaster
How To Clean your Air Filters on the Compressors

Service & Resolution Center

Our service team is dedicated to keeping our customer’s businesses running at optimal performance and assisting with any solutions you need. We are standing by to help you.

Contact Us Today!

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