Schauenburgs Round or Oval Cassette Systems are manufactured for use in Tunnel Boring Machine applications. Our cassettes strong all-steel construction is tough and durable to withstand a great deal of on-the-job abuse. The keys to our cassette design are simple installation and rapid payout of pre-loaded flexible duct.

Our cassette systems facilitates installation of flexible vent ducting in rapidly excavated headings and consists of three basic components: the outlet cone, the duct storage cassette (which houses the ventilation duct) and the ventilation duct. The unit is normally mounted at the face on the cutting machine, TBM continuous miner, etc., and moved forward with the unit.


Round or oval cassettes available.
  • Diameters from 18 to 96 inches (450 to 2450 mm)
  • Cassette capacities from 300 to 1000 feet (92 to 308 meters)
  • Designed for the high pressures encountered in tunneling.
  • Selection of materials from 13 to 24 oz/sq yd (450 to 800 g/m2)
  • Operates at positive pressure outflows.
  • Utilizes a pre-loaded cassette that is refilled at the surface and taken to the work face as a complete unit.
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