Flight/Internal Screw
Key Features
- Available sizes: 168, 219, 273, 323 mm
- Installed inside the hollow pipe of the screw conveyor
- Cast iron screw flight with steel drive shaft
- Ensures smooth and efficient material transfer
- Durable construction for continuous industrial operation
- Suitable for cement, fly ash, and bulk material handling
Screw Conveyor Flight & Internal Screw Assembly Overview
R.A. Enterprises manufactures screw conveyor flights and internal screw assemblies for cement, fly ash and compatible bulk material handling applications. The internal screw generally consists of helical flighting fixed to a centre pipe or shaft and manufactured to match the conveyor casing, pitch, direction of rotation and required material duty. Replacement assemblies can be fabricated from approved drawings or verified samples.
Function
Rotation of the helical screw creates axial movement of bulk material through the conveyor casing from inlet towards discharge.
Construction
- Helical screw flight
- Centre pipe or shaft
- End shaft connections
- Intermediate connections where required
- Welded / fabricated assembly according to drawing
Key Features
- Custom diameter and pitch
- Right-hand or left-hand configuration as required
- Single or sectional screw assemblies
- Replacement fabrication from drawing/sample
- Material selection according to application
Applications
- Cement screw conveyors
- Fly ash screw conveyors
- Powder handling equipment
- RMC and batching plants
- Industrial bulk-material systems
Why Choose R.A. Enterprises?
R.A. Enterprises provides custom screw conveyor fabrication from Pune, Maharashtra with manufacturing according to approved dimensions and supply across India.
Technical Specification – Screw Conveyor Flight & Internal Screw Assembly
| Parameter | Technical Specification |
|---|---|
| Product Type | Helical flight / internal screw assembly |
| Outer Diameter | As per conveyor design |
| Pitch | As per approved drawing |
| Flight Thickness | Application dependent |
| Centre Pipe / Shaft | As per approved design |
| Material | As specified for application |
| Hand | Right-hand / left-hand as required |
| Length | As per conveyor configuration |
| Fabrication | Custom manufactured to drawing/sample |
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Frequently Asked Questions
What is a screw conveyor flight?
A screw conveyor flight is the helical element that rotates inside the conveyor casing and moves bulk material along the conveyor.
What is an internal screw assembly?
It is the complete rotating assembly consisting of helical flighting attached to a centre pipe or shaft together with the required shaft connections.
How does a screw flight move material?
As the screw rotates, the helical flight advances bulk material along the casing from the inlet towards the discharge point.
Can screw flights be manufactured to drawing?
Yes. Flight diameter, pitch, thickness, centre pipe, shaft ends and overall length can be fabricated according to an approved drawing.
Can you copy an existing screw assembly?
Replacement fabrication may be possible from an accurate sample after verifying all critical dimensions, material and rotation direction.
What is screw flight pitch?
Pitch is the axial distance between corresponding points on successive turns of the helical flight and is an important conveyor design parameter.
What is right-hand and left-hand flighting?
The helix direction determines the relationship between shaft rotation and material movement. Replacement flights must match the required conveyor direction.
Can the assembly be used for cement?
Yes, screw assemblies can be designed for cement conveying when dimensions, material and operating conditions are selected appropriately.
Can it be used for fly ash?
Yes, subject to correct design for fly ash properties and the required conveying duty.
How is flight thickness selected?
Thickness depends on screw diameter, material abrasiveness, conveying duty, fabrication method and required service life.
Can worn flights reduce conveyor capacity?
Yes. Excessive wear changes flight geometry and clearance and can reduce effective conveying performance while increasing material recirculation.
Can only one damaged section be replaced?
Sectional repair may be possible depending on shaft condition, alignment and the construction of the existing assembly.
What details are needed for quotation?
Provide outer diameter, pitch, flight thickness, centre pipe diameter, shaft dimensions, length, material, rotation direction, quantity and drawing or sample photographs.
Do you manufacture screw flights in Pune?
R.A. Enterprises manufactures and supplies screw conveyor components from Pune, Maharashtra according to customer drawings and application requirements.
Can you supply internal screw assemblies across India?
Yes. Custom screw flights and internal screw assemblies can be manufactured for customers across India after technical confirmation.