AJAX Equipment UK, manufacturers of screw augers, helical screw flights and screw flight segments for new, refurbished or replacement equipment.

AJAX Screw Auger and Flights Design and Manufacturing Service.

AJAX Equipment produce screw augers and flights only for new applications as well as damaged or worn out equipment. Supply information regarding the product being handled and AJAX may even be able to suggest an improved design for screws and flights.

AJAX can produce augers and screw flights with outside diameters ranging from 20 to approximately 700mm diameter (depending on thickness), Materials of construction include all grades of stainless steel and carbon steel, corrosion resistant alloys such as Hastelloy, wear resistant steel such as Hardox and specialised alloys such as Duplex. AJAX can also advise on screw and flight design for new applications or for improvements to existing applications.

Flights are usually supplied in 360° segments. AJAX carry a limited size range and stock of continuous flights in outside diameters up to 200mm and lengths of up to 2000mm. Please call AJAX to check availability.

To get a quotation for flights only contact us by phone or email with the following information:

• Material of Construction.
• Outside Diameter of the Flight.
• Inside Diameter of the Flight.
• Flight Thickness.
• Flight Design (e.g. Full or Ribbon).
• Surface Finish Requirements.

To get a quotation for a complete screw contact us with the above information, plus the following:

• Overall Flighted Length.
• Inlet length if auger is to be flood fed.
• End shaft details (drive and tail end).
• Welding Requirements.

Some Notes on Screw and Flight Design

The design of an effective screw for transporting or feeding bulk solids depends on a number of factors:

• Will the screw receive a controlled feed or be flood fed from a hopper or a bin. This is critical, for optimum performance. A flood fed screw requires careful attention to the design especially to the portion of the screw directly under the inlet section. A poorly designed flood fed screw can greatly increase the power requirements for the application and can also compromise the reliability of flow from the up-stream equipment.
  
  
• What are the characteristics of the material entering the screw? Cohesive or sticky materials often require a ribbon type flights to avoid clogging or build-up of material at the flight to tube interface. Abrasive powders may require special materials of construction, hard tip and face weld deposits or replaceable wear parts. Corrosive powders will require, not just appropriate selection of contact material but also appropriate welding techniques and surface finish.
  
  
• Will the screw operate in the horizontal plane or will it be inclined upwards and if inclined what is the angle of inclination. Flight and screw design for elevations above 30° differ in subtle but important ways compared to design for horizontal screws.
  
  

Please call AJAX on 44 (0)1204 386723 if you have an enquiry for flights or for a screw auger.

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