Screw Conveyors

A recognized leader in screw conveyor technology

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Since 1983, Custom Conveyor Corporation (CCC) has designed, manufactured, and installed over 3,000 material handling systems worldwide allowing general industrial, municipal water, and wastewater treatment facilities to efficiently convey material.

In 2020 Schwing Bioset acquired substantially all of the CCC assets and continues to manufacture and test all of our conveyor products or systems in our own 32,000 square foot plant in Rogers, MN for quality assurance and system compatibility.

Our goal is to engineer the best belt and screw conveyor solutions for each individual application with the highest quality workmanship at the most economical price.

To learn more about our conveyors, select one of the conveyor types to learn more about how they handle material, or contact us for more information.


Shaftless spiral conveyors eliminate the central shaft and allow a much higher fill rate resulting in lower rpm’s, more efficient conveying, and consequently less wear. Without a shaft, no intermediate or end bearings are required. The trough liner is the spiral’s replaceable bearing surface. The only machined bearings in a shaftless are in the gear reducer. This allows for direct connections and optimizes layout design flexibility. End-to-end and side connections not possible on shafted screw conveyors are common solutions available in the shaftless design. Vertical shaftless conveyors are available in a single unit up to 50 feet and systems in excess of 100 feet in elevation gain.

Custom Conveyor’s open, shaftless spiral design makes these conveyors ideally suited to efficiently convey stringy, sticky waste materials that vary in size, volume, capacity, or dry solids content. They work extremely clean and efficiently for conveying materials such as:

  • Sludge
  • Screenings
  • Scum/FOG
  • Pulp recycle rejects
  • Slaughterhouse waste
  • Lime sludge
  • Grit
  • Paper pulp
  • Food processing waste
  • Wood chips

Superior Steel + Superior Forming = The Highest Quality Spiral

Our shaftless spirals utilize hot-rolled, high tensile, high yield strength, micro-alloy flat bars that produce a spiral extremely resistant to fatigue, crack formation, and growth. They are cold-formed into a spiral by our modern “precise captured CNC winding technology” that forms both diameter and pitch simultaneously and holds higher tolerances than any other spiral manufacturer.

Other spiral manufacturers offer crude 30-year-old “loose pulled method” spirals that vary greatly in diameter and pitch, which lead to spiral fatigue plus uneven liner wear and premature failure.


Shafted Screw Conveyors date to Archimedes and are still one of the most widely used and simplest devices for the movement of material. Shafted screw conveyors are compact and easily adapted to congested layouts.

Custom Conveyor’s Shafted Screw Conveyors efficiently convey dry to semi-fluid and free-flowing to sluggish materials. Screw conveyors are available in a wide variety of materials and US Conveyor Equipment Manufacturers Association (CEMA) sizes. Horizontal and inclined shafted conveyors are available. Special configurations include leveling, load-out, pivot, and stacker designs.

screw conveyor


The XLM (Extremely Low Maintenance) Shafted Screw Conveyor Hanger Bearing is a conveying product unique to Custom Conveyor. This preferred shafted screw conveyor hanger bearing replaces the standard hard iron hanger bearing with machined roller bearings and mechanical seals. XLM has a long life with low maintenance and with the recommended self-lubrication system works well for long runs and trouble free conveying. We design and manufacture our XLM Shafted Screw Conveyors with pride and confidence. All you have to do is install, turn on and let this workhorse conveyor run.

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