Wind Turbine Shaft Market Size & Share Analysis - Growth Trends and Forecast (2026 - 2031)

Global Wind Turbine Shaft Market Trends and Insights

Onshore Wind Turbine Shaft to Dominate the Market

• A wind turbine consists of various components such as blades, controller, brake, gearbox, generator, shafts, and a few others. Shafts in wind turbines are segregated into two types i.e., low-speed shaft and high-speed shaft. A low-speed shaft connects the blades and the gearbox, while the high-speed shaft connects the gearbox and the generator. Both the shaft gets used in onshore and offshore wind turbines.
• During 2018, the cumulative onshore installed wind power capacity reached 568 gigawatts (GW), with the addition of 46.8 GW in 2018. Though the segment had a decrease in installed capacity during the year, but it remains to be the dominating segment across the globe.
• China and the United States remained the largest onshore markets with the highest capacity additions during 2018. China's onshore wind capacity expansion bounced back from 18 GW in 2017 to 21 GW in 2018, after the government's recent change in policy to lift development bans in certain regions, in response to relaxing curtailment levels since 2016. However, in the United States, the onshore additions rebounded slightly from 7 GW in 2017 to 7.5 GW in 2018. The slow growth occurs due to the uncertainties surrounding corporate tax changes.
• The global weighted-average lower cost of electricity (LCOE) of onshore wind projects commissioned in 2018 is at USD 0.056/kWh, and it was 35% lower than in 2010 when it was USD 0.085/kWh. Costs of electricity from onshore wind is reducing every year, and is being driven by continued reductions in total installed costs, as well as by improvements in the average capacity factor. Therefore, the aforementioned factors are expected to drive the wind turbine shaft market in the coming years.

Asia-Pacific to Dominate the Market

• The Asia-Pacific is dominating the wind turbine market with the highest total installed capacity during 2018. The region shares nearly 44% of the total installed capacity of the world.
• China shares the maximum installed capacity in the region, with nearly 23 GW wind energy addition in 2018, and has been the leading country in the region since 2009, with the significant presence of both onshore and offshore wind energy market.
• China onshore market installed 21.2 GW in 2018. The 206 GW total installations at the end of 2018 became the first market to surpass 200 GW of total installed capacity, reaching its target of 200 GW two years earlier (based on the Five Year-Plan 2016-2020).
• As of end of 2018, China held the largest wind power generation capacity in the world. Wind energy accounted for 366 TWh of electricity in 2018 increasing by 24.1% compared to that in 2017. The trend is likely to remain the same, owing to the increasing number of wind power projects in the country.
• During the forecast period, the region is expected to have significant growth in the wind turbine shaft market. Though the region is dominated by coal-powered plants, China is expected to reduce the uses of coal-powered plants by nearly 40% in the coming years to meet the climate goal as stipulated in the Paris Agreement. The reduction in coal power plants is expected to help in the expansion of wind energy and, thereby, the wind turbine shaft market.

Regulatory Landscape

Wind turbine shafts operate within project certification and component conformity regimes that are anchored in international design standards and third-party certification schemes. IEC 61400-1:2019+AMD1:2025 (published December 18, 2025) updates core wind turbine design requirements, including revisions to load cases and safety factors, which then carries through into shaft design verification, materials selection, and manufacturing inspection plans for both low-speed and high-speed shafts.

For global deployments, compliance is commonly demonstrated through independent component certification under the IECRE system (for example, OD-501-style component certification practices), supported by certification bodies such as TÜV Rheinland. In the United States, offshore wind projects and associated critical components operate under BOEM oversight (30 CFR 585 context), and state-level requirements can also reference turbine certification and documentation expectations (for example, New York State Department of Public Service guidance). In China, manufacturing and quality documentation requirements are tightening via standards activity, including YB/T 6486-2026 for wind power main shaft continuous casting round billets (issued April 16, 2026, with an implementation date of November 1, 2026).

Value Chain Analysis

The wind turbine shaft value chain starts with steelmaking and alloy selection, followed by billet or ingot preparation and conversion into shafts via large-scale forging or casting routes. Main shafts are commonly produced from low-alloy steels (for example, 42CrMo4 and 34CrNiMo6) through open-die forging, heat treatment (quenching and tempering), and precision machining, then validated through non-destructive testing and traceable quality documentation before shipment to drivetrain and nacelle assembly lines. Component certification requirements (aligned with IEC and IECRE practices) add process controls across design review, manufacturing assessment, and test documentation.

Downstream, shaft procurement is increasingly bundled with drivetrain or nacelle assembly packages, shifting demand toward long-term allocations and captive supply arrangements rather than spot buying. Logistics is a critical constraint for large shafts, with heavy-lift and specialized transport for components that can weigh roughly 80-150 tonnes creating bottlenecks in some offshore-centric corridors, including North Sea-linked infrastructure. On the supply side, manufacturing concentration remains high, with China playing a dominant role in wind component production, while parts of Europe retain notable machining and production footprints for key components, supporting regional localization efforts and shortening lead times for OEM programs.

Market Opportunities and Future Outlook

Opportunities in wind turbine shafts are being shaped by larger turbine platforms, localization drives, and tighter technical requirements for materials and manufacturing. Standards implementation provides a concrete compliance-led demand driver for upgraded inspection and documentation: China published GB/T 34524-2025 for main shafts on October 31, 2025, and implemented it on May 1, 2026, increasing the importance of qualified forging and casting processes and traceability for shaft suppliers serving China-linked OEM supply chains.

Technology whitespace is visible in mass and performance optimization for larger offshore turbines. Research published in 2026 in Wind Energy Science reports hollow-forged air-hardening ductile (AHD) steel rotor shafts with a reported 37% mass reduction versus conventional cast rotor shafts, highlighting a pathway for suppliers that can industrialize hollow-forging and associated QA methods. On the manufacturing footprint side, announced and started European capacity projects in 2026, for example Vestas plans for a nacelle and hub assembly factory in Scotland for the V236-15.0 MW platform, and Siemens Gamesa shipping first 115 m blades from an expanded Le Havre facility, point to an active push to localize offshore wind supply chains; this supports adjacent demand for regionally qualified shaft machining, heat treatment, testing, and heavy logistics services that integrate with nacelle and hub assembly ecosystems.