Extruder Nitrided Single Screw
Zhejiang Zhongyang Screw Manufacturing Co., Ltd. is one of the leading manufacturers and suppliers of extruder nitrided single screw in China. With abundant experience, we warmly welcome you to buy durable extruder nitrided single screw from our factory. All customized products are with high quality and competitive price.
Product Introduction
Our Extruder Nitrided Single Screw is a direct replacement for worn screws in existing extrusion lines. This Extruder Nitrided Screw Only is manufactured to original specifications using high-grade 38CrMoAlA steel.
Product Description
The Extruder Nitrided Screw Only undergoes gas nitriding to achieve HV 850–1000 surface hardness and 0.5–0.8 mm case depth. Perfect for PVC, PE, and soft compound extrusion, this Extruder Nitrided Screw Only provides excellent corrosion resistance and dimensional stability. We reverse engineer from your old screw or drawings, ensuring a drop-in fit. Our Extruder Nitrided Screw Only is precision ground ≤ Ra 0.4 μm finish and straightness 0.015 mm/m. With 20+ years of screw manufacturing experience and fast delivery, we help minimize your production downtime.
Industry Applications
PVC Pipe Extrusion Replacement
Used as a direct replacement for worn screws in existing PVC pipe lines. Our Extruder Nitrided Screw Only matches original specifications, ensuring drop-in fit and immediate operation.
Soft PVC Profile Extrusion
Applied in flexible PVC profiles for seals, gaskets, and hoses. Our Extruder Nitrided Screw Only provides excellent corrosion resistance and smooth surface finish (Ra 0.4 μm), minimizing melt stagnation.
General-Purpose Extrusion Retrofit
Commonly used for PE/PP sheet and film lines. Our Extruder Nitrided Screw Only offers cost-effective replacement without modifying existing barrels, reducing machine downtime.
Technical Dates
|
Parameter |
Value |
|
Screw Diameter |
Φ15 – Φ500 mm |
|
L/D Ratio |
L/D = 15 – 55 |
|
Materials |
38CrMoAlA (SACM645), 31CrMoV9 (1.8519), 34CrAlNi7 (1.8550), X153CrMoV12 (1.2379), Cr12MoV (SKD11), 4Cr5MoSiV1 (SKD61, H13), 9Cr18MoV, 42CrMo |
|
Surface Roughness |
Ra 0.4 μm |
|
Linearity |
0.015 mm/m |
|
Nitrided Hardness |
HV 850 – 1000 |
|
Nitrided Depth |
0.5 – 0.8 mm |
|
Bimetallic Thickness (Screw) |
2 – 3 mm |
|
Bimetallic Thickness (Barrel) |
1.5 – 2.5 mm |
|
Bimetallic Hardness |
HRC 50 – 65 |
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