Screw Barrel Manufacturer in Bengaluru

We supply a comprehensive range of screw barrel sets to processors across Bengaluru covering all major application types. This includes extrusion single screw barrels from 14mm to 300mm diameter and up to 6000mm length, parallel and conical extrusion twin screw barrels from 25mm to 200mm, injection moulding screw barrel sets from 20mm to 150mm, and blow moulding screw barrels from 25mm to 200mm with maximum 5000mm length. Each type is available in standard and customised configurations including bimetallic alloy coating, groove feed barrel assemblies, barrier screw geometries, and Medoc barrier or mixing ring designs. We also supply matched ring plungers, barrel heads, and all associated spare parts. Bengaluru customers across aerospace, electronics, automotive, FMCG, cable, and pharmaceutical packaging sectors are served through our Ahmedabad manufacturing facility with reliable dispatch logistics to Karnataka.

All our screws are manufactured from MUSCO grade EN 41B-38CrMoALA alloy steel, specifically formulated to respond to gas nitriding with exceptional case depth and hardness uniformity. After gas nitriding, our screws achieve 68 HRC hardness at 0.6mm case depth — significantly deeper than screws made from EN 8 or EN 19, which typically nitrize to 0.2 to 0.3mm effective depth. This deeper hard case means the screw surface remains wear-resistant far longer under continuous abrasive polymer loads — a critical advantage for Bengaluru’s glass-filled and mineral-filled polymer processors in the automotive, aerospace, and electronics sectors. For ultra-high-wear applications, we apply Colmonoy 705 bimetallic alloy coating at Rockwell C 59-64 hardness up to 1500 micron thickness, extending flight surface life by multiples over standard nitrided alternatives. Material selection is not a cosmetic decision — it directly determines the cost per kilogram of polymer processed over the barrel’s service life.

Yes. We manufacture screw barrel sets compatible with all major machine OEM designs currently operating in Bengaluru’s industrial plants, including Kolsite, Windsor, TTS (Thayson), CMT, KMD, and Rollepal as standard production capabilities. We also manufacture to customer-supplied drawings or machine specifications for non-standard or imported machinery. When ordering, our technical team requests the machine make and model, current screw diameter, L/D ratio, drive end spline or key configuration, and barrel flange pattern — all of which allow us to produce a dimensionally exact replacement. Bengaluru customers operating European-made or Taiwanese-imported extrusion and injection moulding machinery are particularly well served by our customised manufacturing capability, which eliminates the delays and high costs associated with sourcing original import parts.

A standard nitrided screw barrel is manufactured from alloy steel and case-hardened through gas nitriding to achieve surface hardness in the range of 60-68 HRC. This provides excellent wear resistance for general polymer processing including PVC, HDPE, PP, and LDPE, and is the correct specification for most standard extrusion and injection moulding applications in Bengaluru. A bimetallic screw barrel takes wear protection a step further by applying a metallurgically bonded hard alloy layer — Colmonoy 705 at 72 HRC up to 1500 micron thickness — directly to the screw flight surfaces and barrel bore. This bimetallic layer is significantly harder and thicker than what gas nitriding alone can achieve, making it the correct specification for Bengaluru’s processors running glass-filled nylon at 30-40%, mineral-filled compounds, reprocessed PVC, or highly abrasive masterbatch blends. The bimetallic specification carries a higher initial cost but delivers substantially lower total cost of ownership through extended replacement intervals.

Yes. We manufacture complete groove feed barrel assemblies for single screw extruders — a product particularly relevant to Bengaluru’s HDPE pipe, PP film, and cable insulation processors. The groove feed design introduces controlled grooves in the feed zone of the barrel, which significantly increases polymer pellet friction and drives higher throughput at lower melt temperatures compared to smooth bore barrels. This reduces thermal degradation risk and improves extrudate quality for temperature-sensitive polymers. The groove feed body is manufactured from M.S with an EN 8 housing, and the groove sleeve is made from HSS material for internal water cooling compatibility, hardened to 60-62 HRC through vacuum process. We offer two groove sleeve configurations — Normal Type and Spiral Type — selected based on the specific polymer and required throughput profile of the Bengaluru customer’s extrusion line.

Delivery lead times to Bengaluru depend on the product type and order complexity. For standard single screw barrels and injection moulding screw barrel sets in commonly manufactured sizes, typical lead time from order confirmation and drawing approval is 4 to 6 weeks. For customised or large-diameter twin screw barrels, bimetallic coated assemblies, or complete matched sets including ring plunger and barrel head, lead times may extend to 6 to 10 weeks depending on the specification. Bengaluru customers receive confirmed lead times at the order stage — not estimates that shift during production. We recommend Bengaluru processors maintain one replacement set in stock for each critical extrusion or injection line to eliminate unplanned shutdown exposure during replacement lead time. Our team can advise on stocking strategy based on your machine’s polymer type and run hours.

Screw barrel wear manifests through several observable and measurable symptoms that Bengaluru’s production and maintenance teams should monitor. Output rate decline at unchanged process settings is an early indicator — as barrel-screw clearance increases through wear, volumetric efficiency drops and throughput falls. Inconsistent shot weights in injection moulding or variable extrudate dimensions in extrusion are also early wear signals. Elevated barrel temperature requirements to achieve the same throughput suggest reduced plasticisation efficiency. Advanced wear shows up as increased colour changeover time, poor masterbatch dispersion, and in severe cases, degradation streaks in the extrudate. Dimensional measurement using feeler gauges at the feed zone, metering zone, and mid-barrel bore can quantify wear clearance against acceptable tolerances. Our technical team can advise Bengaluru customers on machine-specific acceptable wear limits and replacement decision criteria.

Yes. Many of Bengaluru’s sophisticated manufacturing operations — particularly in aerospace, electronics, and medical device sectors — run European or Taiwanese extrusion and injection moulding machinery where original imported screw barrels carry very high replacement costs and long import lead times of 12 to 20 weeks or more. We manufacture reverse-engineered replacement screw barrel sets from customer-supplied drawings or dimensional surveys of existing worn components. Our manufacturing tolerances, base material specifications, and surface treatment processes meet or exceed the standards of most European OEM parts. Bengaluru customers have achieved cost savings of 40-60% compared to imported OEM parts, with no compromise in service life. The reduction in lead time from 12-20 weeks (imported) to 4-8 weeks (domestic manufacture) is equally significant for Bengaluru’s production continuity.

Our quality system incorporates hold points and inspection gates at multiple stages throughout the manufacturing process, not only at final dispatch. Raw material certification and composition verification is carried out at intake. Post-machining, dimensional inspection verifies outer diameter, inner bore, lead, pitch, and flight profile accuracy against drawing tolerances. The dedicated quality check before nitriding is a critical mandatory hold — all dimensional and surface finish parameters must pass before components enter the nitriding furnace, since post-nitriding correction capability is severely limited. After nitriding and finish grinding, hardness testing at specified locations confirms 68 HRC at 0.6mm depth. Final inspection includes surface roughness measurement, visual surface inspection, and complete dimensional re-verification. All inspection records are maintained and can be provided to Bengaluru customers on request for their traceability documentation.

A barrier screw incorporates a secondary flight in the transition zone that physically separates unmelted solid polymer from already-melted material, forcing solids against the barrel wall where heat transfer is most efficient and channelling melt through the barrier into the melt channel. The result is more complete melting at a given screw speed, lower melt temperature from reduced shear heating, and more consistent melt quality compared to a conventional screw design. Bengaluru’s processors running high-output HDPE pipe extrusion, PP film lines, or high-volume packaging film extrusion benefit most from barrier screws — gaining higher throughput, better melt homogeneity, and reduced energy consumption per kilogram of polymer processed. We manufacture barrier screws in both standard nitrided and bimetallic configurations, with L/D ratios and barrier geometry matched to the specific polymer and machine throughput requirement.

Correct screw barrel selection requires matching five parameters: the polymer being processed, the machine L/D ratio, the required output rate, the acceptable melt temperature range, and whether fillers or additives are present. For unfilled commodity polymers — HDPE, PP, LDPE, PVC — running on standard L/D 25-30 machines, a standard nitrided single screw barrel with appropriate compression ratio is the correct specification. For glass-filled or mineral-filled compounds, bimetallic alloy coating on the screw and HSS sleeve in the barrel bore is the specified solution. For high-output HDPE or PP extrusion requiring maximum throughput at minimum melt temperature, a groove feed barrel assembly combined with a barrier screw delivers the best performance profile. For injection moulding with abrasive polymers, Medoc barrier geometry with bimetallic coating and H-13 ring plunger is the standard recommendation. Our technical team provides specification consultation to all Bengaluru customers before manufacturing to ensure the correct design is produced.

Our twin screw barrels are designed specifically for PVC-compound-based processing in the pipe and profile industry. Compatible materials include RPVC (Rigid PVC) for standard pressure pipe, UPVC for drainage and high-pressure piping, CPVC (Chlorinated PVC) for hot water and industrial piping systems, and WPC (Wood Polymer Composite) for decking, cladding, and furniture profiles. For high-filler loading applications — calcium carbonate-filled PVC pipe compound beyond 30 phr loading — we recommend bimetallic alloy-coated twin screw barrels with Colmonoy 705 on screw flights and HSS sleeve bore protection. Standard nitrided twin screw barrels are appropriate for unfilled or lightly filled PVC compounds, while bimetallic configurations deliver the necessary wear life for the high-filler compounds that Bengaluru’s pipe extruders routinely process.

Absolutely. Glass-filled nylon — PA6-GF30, PA66-GF30, PA66-GF50 — is among the most abrasive polymers encountered in injection moulding. The glass fibres act as a cutting medium against screw flights and barrel bore surfaces, and standard nitrided barrels show accelerated wear in these applications. For Bengaluru’s automotive component moulders running glass-filled nylon for structural brackets, under-bonnet parts, and engine-adjacent components, we specify bimetallic alloy-coated injection screw barrel sets as standard. The Colmonoy 705 coating on screw flights at 72 HRC and the HSS sleeve in the barrel bore create a matched wear-resistant system delivering substantially longer service life than standard nitrided alternatives. The H-13 material ring plunger with 50-52 HRC full-depth hardness ensures the injection system maintains consistent shot volume and suck-back performance throughout the extended service interval.

Yes. A significant portion of our production volume involves customised screw barrels manufactured to specifications provided by the customer. Bengaluru customers operating non-standard, rebuilt, or imported machines for which OEM spare parts are unavailable, discontinued, or unaffordably priced can provide us with dimensional drawings, worn component measurement reports, or machine specification sheets. Our design team reviews the requirements, proposes the appropriate material and surface treatment specification, and confirms the design before manufacturing commences. For customers who cannot supply drawings, we can work from dimensional survey data on the worn screw or barrel. This customisation capability is particularly valuable to Bengaluru’s aerospace and electronics processors who operate specialised imported extrusion equipment not commonly served by domestic Indian spare parts channels.

Screw barrel service life in Bengaluru’s processing plants can be significantly extended through consistent operational discipline. Temperature control is paramount — running barrel temperatures above the recommended maximum for the polymer causes premature bore wear and screw surface oxidation, so temperature controllers and thermocouples should be calibrated regularly. Thorough purging before machine shutdown prevents degraded polymer from carbonising on screw surfaces overnight, which creates an abrasive layer that damages the barrel bore and screw flight on the next startup. When changing polymer grades — particularly moving from filled to unfilled grades or between chemically incompatible polymers — a purging compound should be used to completely remove residual material before degradation begins. Periodic dimensional monitoring using feeler gauges and dial gauges at the feed zone, metering zone, and mid-barrel bore allows wear to be tracked and replacement planned before it reaches a level that impacts production output or extrudate quality. Our technical team provides Bengaluru customers with machine-specific maintenance guidance on request.