Bimetallic Screw & Barrel Manufacturers in India
Sai Extrumech is a leading bimetallic screw barrel manufacturer in India, producing wear-resistant bimetallic screws and barrels for extruders running abrasive and highly filled compounds. When you process filled XLPE, HFFR/LSZH, glass-filled or mineral-filled materials, standard nitrided screws wear quickly — a bimetallic screw and barrel lasts several times longer, protecting your output quality and lowering cost per year.
What Is a Bimetallic Screw & Barrel?
A bimetallic barrel has a hard alloy inner lining metallurgically bonded to the barrel body, and bimetallic screws carry a hard-facing on the flights. This inner layer resists the abrasion caused by filled and reinforced compounds far better than standard nitrided steel. The result is a longer service life, more stable output over time, and fewer costly replacements.
Bimetallic vs Nitrided
- Nitrided — cost-effective for standard PVC and PE compounds
- Bimetallic — for abrasive, filled or flame-retardant compounds (filled XLPE, HFFR, glass-filled), where it pays for itself in extended life
- We supply both and help you choose based on your compound. See our full screw and barrel range.
Why Choose Sai Extrumech
- 25+ years manufacturing screws & barrels in Faridabad, India
- Diameters 25–150 mm, L/D 20:1 to 32:1, custom flight geometry
- Bimetallic and nitrided options matched to your exact compound
- Replacement bimetallic screws & barrels for extruders from other makers
- Exports to UAE, UK, South Africa, Bangladesh, Nepal & Sri Lanka
Frequently Asked Questions
Who is the best bimetallic screw barrel manufacturer in India?
Sai Extrumech is a leading bimetallic screw barrel manufacturer in India, supplying wear-resistant screws and barrels engineered for abrasive and filled compounds.
How much longer does a bimetallic barrel last?
For abrasive compounds, a bimetallic barrel typically lasts several times longer than a nitrided one, lowering replacement cost and downtime over the machine life.
When should I choose bimetallic over nitrided?
Choose bimetallic when running filled, flame-retardant or glass-reinforced compounds. For standard PVC and PE, nitrided is usually sufficient.
When to Upgrade to a Bimetallic Screw & Barrel
The decision comes down to the compound you run. Standard nitrided screws and barrels are cost-effective for unfilled PVC and PE. But abrasive and highly filled materials — filled XLPE, HFFR/LSZH flame-retardant compounds, glass-filled and mineral-filled polymers, and many masterbatches — wear nitrided steel quickly, causing rising clearances, falling output and inconsistent insulation. If you are replacing screws or barrels more often than you would like, or your output and quality drift over a production campaign, a bimetallic upgrade usually pays for itself in extended life and fewer stoppages.
Sai Extrumech manufactures bimetallic screws and barrels with a hard, wear-resistant inner layer engineered for these demanding compounds, in diameters from 25 mm to 150 mm and L/D ratios from 20:1 to 32:1, with flight geometry matched to your material. We also supply bimetallic replacements for extruders from other makers — send us your current specification and material datasheet and we will recommend the right configuration.
Which compounds most need a bimetallic screw and barrel?
Filled XLPE, HFFR/LSZH, glass-filled and mineral-filled compounds, and abrasive masterbatches benefit most, because they wear standard nitrided steel quickly.
Can you supply a bimetallic replacement for my existing extruder?
Yes — share your current screw and barrel specification and material, and we will manufacture a matched bimetallic replacement.
