Stefmet technologies have in-house steel design and fabrication capabilities from small to medium engineering requirements. Stefmet Technologies can fabricateand line chutes,pipework,and launders,to deliver the excellent quality, service, and reliability that customers expect.
Duradrive
Stefmet Technologies refurbish all types of driveshafts in mining load haul applications. This is an often-overlooked part of the mine vehicle maintenance program that can yield huge savings for the mine.
Driveshafts can also be modified to include service free lube points for reduced downtime where access to these lube points is problematic.
Driveshafts are collected from the mine, refurbished to the highest quality and returned as new with the same OEM warranty. On request any vehicle that has a driveshaft can have it refurbished by Stefmet Technologies.
An inspection report is done on each driveshaft and submitted for evaluation before the repairs are done.
Dura Screen
Dura Screen
Stefmet Technologies offer injection moulded polyurethane screen panels as well as injection moulded and compression moulded rubber screen panels to suit your process requirements.
The Durascreen panel features:
- Cost effective
- Improved wear resistance
- Superior open area
- Excellent reinforcement
- Quality moulded to ensure accurate hole sizing and consistent performance
- Aperture moulded at an angle to increase throughput
- Standard fittings to ensure seamless integration into existing screens
- Improved de-watering and media recovery
TPU and Rubber panel specifications:
| Polyurethane Panels | Rubber Panels | |
| Thickness (mm) | 31,35,40,50 | 31, 35, 40, 50, 70 |
| Size (mm) | 300,305 | 300, 305 |
| Aperture Size (mm) | 0.3 – 80 | 0.3 – 100 |
| Hole Type | Square, slotted, VR, VP, Oval, round | Square, slotted, VR, VP, Oval, round |
| Shore Hardness | 87 (TPU) 85 (Anti Bac) 60 (SP) | 40, 60 |
| Pin Fixing Type | PNN, Round P&S, H-Pin | Square, slotted, VR, VP, Oval, Round |
| Pin Fixings | 4 & 6 | 4 |
| L-Shape | Yes | Yes |
| Carrier Bars | Yes | Yes |
| Flow restrictor/Deflector | Yes | Yes |
Cast and Extruded Polyurethane
- Extruded sheets
- Wire inserts
- Multi coloured sheets for wear rate detection
- Rubber backed PU liners
Rubber Compression products:
- Grizzly scalping panels Max 1100 x 1400 x <100mm thick
- Side Liners: 1220 long (20mm, 25mm, 30mm thick)
- Metal backed liners
CrC Load Bin
Duramax CrC Wear Liner Plate is a product of Stefmet technologies in South Africa and is solely distributed through Stefmet Technologies
Full technical support will be available from both Stefmet Technologies as required.
Duramax CrC wear plate is ideal for the following applications where moderate to high impact and superior wear resistance is required:
• Dump Truck Load Bins
• Shovel faces
• Load Buckets
Stefmet Supply Technique:
• Submerged Arc Welding (SAW) Hard Facing with hardness of (HRC 58-65) depending on overlay thickness.
• Penetration typically 0.9mm – 1.7mm onto a high-grade mild steel base, resulting in a well bonded CrC overlay deposit to form the CrC overlay sheet.
• Fusion (welding) takes place under thick flux cover, eliminating oxide formation and gas pick-up.
• The process ensures an even and smooth surface using zig-zag weave beads motion with weld passes of approximately 25mm – 37mm in width.
• Surface cracking common on CrC is due to mismatch of coefficient of thermal expansion between 2 phases (base and overlay).
• CrC plate offers good strength, high hardness, and oxidation- & corrosion resistance at elevated temperatures ± 600°C.
Composition:
• Cr: 27-37%; C: 3.5-5%; Mn:0.8-1.1%; Mo: 0.08-0.18%; Ni: 0.08-01.15% + additional micro filler elements (Typically Fe, etc.)
• Welding (Wear Surface / Overlay) – AWS: E FeCr-A1 Electrode
• Welding (Backing Plate / Fixing) – General Purpose Electrodes, i.e. E6013; E7018; MIG/C02
• Weldable thickness: 3mm – 40mm
• Specific Gravity (AVG) – 7,9
Typical sizes available: