Line Shafts
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Sunmach is an ISO 9001:2015 certified global manufacturer specializing in premium Custom Line Shafts, high-integrity Custom line Shafting, SS line Shafts, and high-yield Duplex line Shafts, custom-machined to client blueprints to deliver exceptional torsional rigidity and dynamic balance in horizontal, multi-bearing power transmission lines. Acting as the primary mechanical backbone that distributes rotational torque ($T$) from a centralized prime mover to multiple downstream pulleys, gears, or driven components, our line shafts are engineered to resolve parallel and angular misalignment offsets across long spans, suppress dynamic vibrations, and sustain mechanical stability under high startup load peaks. By employing horizontal boring mills, multi-axis CNC turning, and centerless cylindrical grinding, we fabricate multi-segment Precision line Shafts, Custom Stainless Steel line Shafts, and Custom Duplex line Shafts that eliminate the primary causes of long-span failure, including gravitational sagging between bearing supports, torsional phase lag (wind-up), keyway stress cracking, and dynamic whirling resonance. Specially designed to operate under combined mechanical preloads, thermal expansion gradients, and aggressive process fluids, our custom-finished Stainless Steel line Shafts and high-yield duplex variants provide outstanding structural stability across a broad spectrum of temperatures. Sourced exclusively from premium global mills, our dual-phase duplex alloys offer nearly double the yield strength of traditional austenitic steels with exceptional fatigue resistance, making them highly specified for marine auxiliary workshops, coastal pulp and paper mills, high-salinity seawater desalination tunnels, and aggressive chemical processing corridors. Backed by rigorous quality validation, compliance with international material specifications, and complete mill traceability, Sunmach ensures zero-failure performance, safeguarding mission-critical horizontal machinery against premature bearing wear, coupling fatigue, and expensive process downtime.
Line Shafts
Definition -A Line Shaft is a long rotating shaft used to transmit mechanical power over a distance to multiple machines or components. Its purpose is to distribute power from a single prime mover, such as an electric motor or engine, to several driven machines using pulleys, belts, or gears. Line shafts are commonly used in traditional factories, workshops, textile mills, and industrial setups where centralized power transmission is required.
Sunmach is a globally recognized manufacturer and supplier of high-precision Line Shafts, produced from premium-grade Nickel Alloys and Stainless Steel. These Line Shafts are custom-fabricated strictly in line with customer-provided drawings and maintained within specified dimensional tolerances. Engineered to perform under demanding conditions, these tailor-made shafts are designed for the most critical industrial applications.
We are an ISO 9001:2015 certified company, demonstrating our commitment to rigorous quality standards and consistent product excellence to deliver the best of the Nickel Alloys & Stainless Steel Line Shafts.
We make these Line Shafts from a range of high-performance & exotic materials such as : Hastelloy® C-276, Hastelloy® C-22, Hastelloy® B-2, Monel® 400, Monel® K-500, Inconel® 600, Inconel® 625, Inconel® 718, Titanium Grade 2, Titanium Grade 5, Titanium Grade 7, Duplex S31803, Duplex S32205, Super Duplex S32750 to various Stainless Steel grades of SS 304L, SS 316L SS 310, SS 310H, SS 347H, etc followed by Special Stainless Steel Grades such as 904L Stainless Steel, UNS N08904, DIN EN1.4539 Nitronic® 50, Nitronic® 60, UNS S21800, DIN EN, 254 SMO, UNS S31254, DIN EN 1.454, Stainless Steel 410 & Stainless Steel 420 etc.
Sunmach’s extensive manufacturing capabilities and In-Stock Genuine & Authentic Raw Material availability allows us to support demanding industrial requirements with durable, corrosion-resistant, heat resistant & reliable Shafts made from Genuine Nickel Alloys and Stainless Steel Material, delivered dot in time to any corner of the world, supported by all required test certificates and with 100% traceability.
Stainless Steel & Nickel Alloy Line Shafts Application Industries
Sunmach serves a diverse range of markets including Pump Industries, Chemical Processing, Semiconductor, Power Generation, Aerospace, Oil & Gas, Pharmaceutical, Food & Beverage, Marine, Pulp & Paper, Petrochemical & Refining, Air Pollution Control and Water Treatment.
Sizes
| Maximum Diameter: | 125mm Diameter |
| Maximum Length: | 3050 mm |
| Maximum Weight: | 300 Kgs (Finished Single Shaft) |
Frequently Asked Questions
Common questions about Sunmach Custom Line Shafts
Custom Duplex Line Shafts provide nearly double the yield strength of traditional shafts along with significantly higher fatigue resistance, allowing designers to use smaller shaft diameters, reducing dynamic rotational mass and bearing loads.
A hollow design should be specified in high-speed, long-span machinery where weight reduction is critical, reducing total rotating weight by up to 50% with minimal loss in stiffness, decreasing gravity sag and bearing preloads.
Standard keyways feature sharp, square corners that act as severe stress concentrations. Our Precision Line Shafts are machined with precise fillet radii in the keyway roots, allowing stress lines to flow smoothly and significantly extending fatigue life.
Every batch is shipped with EN 10204 3.1 Mill Test Certificates verifying raw material chemistry, physical pulling strength, and hardness, accompanied by non-destructive testing logs, laser straightness runout charts, and dynamic balancing reports.