Overview

This document details technical specifications, materials, design features, and performance benefits of screw conveyor accessories including dosing wheels, screws (standard and special), shaft couplings, and scrapers. It provides dimensional data, material properties, and multilingual descriptions.

1. Product Types and Components

• Dosing Wheels: Diameters range from 100 to 250 mm with 6 to 8 paddles depending on size.
• Scrapers: Available as standard or with kicker bars for enhanced cleaning and material removal.
• Standard Screws: Made from SINT®AL or SINT®ER materials, designed for inlet, intermediate, and outlet conveyor sections; inlet and outlet screws feature tapered center pipes.
• Special Screws: Various sizes with detailed dimensional parameters and weights, tailored for specific pitch and diameter requirements.
• Shaft Couplings: Offered in carbon and stainless steel with options including splined shafts (DIN 5482), splined and bolted, or bolted shafts; dimensions and thread sizes vary by screw diameter.

2. Technical Specifications and Dimensions

Comprehensive tables specify diameters, lengths (L1 to L5), pitches, and weights per meter for screws and accessories. Tolerances are +0/-2 mm for total screw length and -1/+1 mm for other dimensions, ensuring precise fit and function.

3. Material Characteristics

• SINT®AL: FDA-approved, excellent abrasion and corrosion resistance, impact strength, hydrolysis resistance, and non-stick properties; operating temperature from -25°C to +80°C.
• SINT®ER: Not FDA-approved but offers very good mechanical properties including abrasion resistance and impact strength; similar temperature range.

4. Performance and Design Features

• Friction Reduction: Smooth surface finish lowers energy consumption and noise.
• Zero Clearance Design: Minimizes material residue by allowing zero clearance between screw and trough.
• Flexible Flighting: Prevents material degradation and grinding, ideal for delicate or food-grade products.
• High Abrasion Resistance: Materials provide 4-5 times greater abrasion resistance than carbon or stainless steel, and 2-3 times greater than HARDOX steel.
• Non-stick Surface: Enhances material flow and reduces cleaning time.
• Rounded Transitions: Between shaft and flighting reduce material buildup and facilitate cleaning.

5. Standards and Certifications

• Certified under UNI EN ISO 9001-2000 quality management system.
• FDA approval applicable for food-grade SINT®AL materials.
• Compliance with DIN 5482 for splined shaft couplings.

6. Recommendations and Best Practices

• Use flexible flighting screws to avoid product degradation.
• Select SINT®AL for FDA compliance and superior abrasion resistance.
• Maintain specified dimensional tolerances for optimal assembly and operation.
• Choose scraper types based on cleaning and material removal requirements.

7. Manufacturer and Contact Information

WAM S.p.A., Via Cavour 338, 41030 Ponte Motta, Cavezzo (MO), Italy.
Phone: +39 0535 618111
Email: [email protected]
Website: www.wamgroup.com

8. Summary of Critical Technical Data

• WAM® standard bearing supports enable modularity and ease of assembly.
• Material choice affects FDA compliance and mechanical performance.
• Tight dimensional tolerances ensure proper fit and function.
• Special accessories like dosing wheels and scrapers improve conveying efficiency and cleaning.
• High abrasion resistance and non-stick surfaces reduce maintenance and operational costs.

9. Material Properties Comparison Table