What Rotor does

Rotor B.V. is a Netherlands-based industrial electric motor manufacturer founded in 1958 and headquartered in Eibergen, operating as a wholly-owned subsidiary of WEG Group, a Brazilian multinational electric motor and automation conglomerate. The company designs and supplies IEC-standard three-phase induction motors spanning IE2 through IE5 efficiency classes, with power outputs from 0.09kW to 1000kW across frame sizes 63-500 and pole configurations from 2-10. Its product portfolio includes marine motors (604 variants), explosion-proof ATEX/IECEx motors (311 variants, 6RD series), IE3 (916 variants) and IE4 (295 variants) premium-efficiency motors, open drip-proof (ODP) motors, and the Rotor Eco-series brake motors built on the Terramax platform. Specialized applications include subsea cable-laying vessel motors, 1MW marine propulsion motors, and customized windings, shafts, cooling systems, and multi-layer corrosion-resistant coatings.

Rotor serves four primary verticals: Marine, Industrial, Oil & Gas, and Crane & Offshore, with marine being the deepest area of specialization supported by certifications from major classification societies (ABS, BV, Lloyd's, DNV, CCS, RMRS, RINA, NKK, KRS). The business model is B2B direct sales, with pricing conducted through quote-based engagement for custom specifications and an online catalog (Webstock) of 5,379+ stock motor variants supporting rapid delivery for standard configurations. Marketing is conducted through industry trade shows (SPS, Europort Rotterdam, NOR-Shipping), direct sales associates, and a product documentation website. Rotor maintains in-house testing facilities capable of handling medium-voltage motors for customer acceptance testing and classification society inspections.

The company's competitive position rests on over 60 years of domain expertise, an extensive certification portfolio, and the ability to deliver both standard catalog products and fully custom-engineered solutions. Recent strategic activity has emphasized portfolio expansion into higher-efficiency classes (IE5 Synchronous Reluctance Motors) and into adjacent applications such as offshore wind subsea cable installation. As a subsidiary of WEG Group, Rotor benefits from global corporate backing while retaining operational independence at its Eibergen facility, with a headcount of 51-100 employees.

Name

Rotor

Legal name

Rotor B.V.

Website

https://rotor.nl

Company type

Private

Founded year

1958

Operating status

Operating

Headcount range

51–100 employees

Short description

Rotor B.V. is a Netherlands-based industrial electric motor manufacturer, founded in 1958 and part of WEG Group, supplying IE2-IE5 efficiency motors, marine-certified motors, ATEX/IECEx explosion-proof motors, and brake motors to marine, industrial, oil & gas, and crane & offshore customers worldwide via direct sales and custom engineering.

Ownership category

akta.pro rank

Headquarters

HQ city

Eibergen

HQ country

Netherlands

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Supply Chain, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Electric Motor Sales: Rotor generates revenue primarily through the sale of electric motors across various efficiency classes (IE2-IE5), types (standard, marine, explosion-proof, brake motors), and power ratings. Products are sold directly to industrial customers with customization options. The company maintains substantial stock (5,379+ items) for rapid delivery while also offering custom-engineered solutions.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

Rotor manufactures and supplies a comprehensive range of IEC-standard electric motors spanning IE2 through IE5 efficiency classes, with specialized variants for marine, hazardous area (ATEX/IECEx), and heavy-duty industrial applications. The company combines a catalog of more than 5,000 stock variants with custom-engineered solutions, supported by in-house testing, certification, and proprietary coating systems. Product power outputs range from 0.09 kW to 1 MW across frame sizes 63–500.

Product overview

Rotor is an industrial electric motor company headquartered in Eibergen, Netherlands, operating as part of the WEG Group. The company offers a comprehensive portfolio organized under two main brands: Rotor NL® (primary brand) and Marathon (secondary brand). The product range spans multiple efficiency classes (IE2 through IE5), motor types (standard, marine duty, flameproof/ex-d, open drip-proof/ODP), and power ranges from 0.09kW to 1000kW across frame sizes 63-500 and pole configurations from 2-10 poles. The 6RD series represents ATEX/IECEx certified explosion-proof motors, while the 23RN and 5RN/6RN series cover general purpose and high-efficiency applications. The Eco-series brake motors, based on the Terramax platform, serve marine and offshore applications including winch systems. Rotor also provides specialized motors for demanding applications such as subsea cable-laying vessels and 1MW propulsion motors. The company maintains a stock program (Webstock) with over 5,379 variants available, alongside custom engineering, testing/certification, and coating services.

Differentiator

Problem solved

Functional benefit

Brands

• Rotor NL®: Primary brand for Rotor's standard and specialized motor products serving marine and industrial markets.
• Marathon
• Rotor Eco Series
• 6RD Series

Products and services

• IE3 Premium Efficiency Motors High-efficiency IE3 classified three-phase induction motors with outputs from 0.09 kW to 1000 kW, frame sizes 63–500, available in 2–10 pole configurations. The IE3 line includes 916 catalogued variants and serves industrial and marine customers seeking premium efficiency compliance.
• IE4 Super Premium Efficiency Motors Super premium efficiency IE4 classified motors offering superior energy savings, with 295 catalogued variants and outputs from 0.09 kW to 1000 kW for industrial and marine applications where the highest energy performance is required.
• IE5 Synchronous Reluctance Motors Ultra-premium efficiency IE5 synchronous reluctance motors representing the highest IEC efficiency class, intended for industrial customers seeking maximum energy efficiency.
• Marine Motors Motors specifically designed for marine applications, with 604 catalogued product variants, meeting requirements of major classification societies including Lloyd's, DNV, GL, ABS, CCS, RMRS, RRR, RINA, NKK, and KRS. Used for propulsion, deck equipment, pumps, ventilation, hydraulics, and compressors on ships and offshore vessels.
• Ex-d (Flameproof) Motors ATEX/IECEx certified explosion-proof motors from the 6RD series for use in hazardous areas, including IE3 and IE4 efficiency classes with 311 product variants. Designed for oil and gas, offshore platforms, and processing facilities where explosive atmospheres may be present.
• ODP (Open Drip Proof) Motors Open drip-proof motors suitable for general industrial applications where protection against dripping water is required, featuring modular construction with multiple mounting configurations (B3, B5, B3/B5, V1, V5, V15) and frame sizes up to 315. 229 catalogued variants available.
• Rotor Eco-Series Brake Motors Brake motors based on the Terramax platform, specifically designed for marine and offshore applications including mooring winches, anchor winches, and traction winches. Features Hubner encoders as standard with options for Pintsch, Stromag, or Premica brands.
• 1 Megawatt Propulsion Motors Four 1 Megawatt 440V propulsion motors delivered to Asia for marine propulsion applications, with demanding delivery time and marine certification requirements.
• Subsea Cable-Laying Vessel Motors Highly specialized motors (15.6 kW to 87 kW, frame sizes 132–315) for subsea cable-laying vessels, designed for reliable operation of carousels, tensioners, and capstans used in handling and deploying ocean floor cables weighing thousands of tonnes for renewable energy infrastructure.
• Webstock Stock Motor Program Stock inventory program offering 5,379 motor variants available for rapid delivery, including IE2, IE3, IE4, Ex-d, Marine, ODP, TCA, and QCA motor categories. Customers can browse and request quotes online for standard products through the Webstock online storefront.
• Custom Motor Engineering Solutions Custom motor engineering service offering non-standard shafts, special cooling systems, custom mounting arrangements, custom product dimensions, multi-layer coating systems, and special windings to meet unique customer equipment requirements across marine, industrial, oil & gas, and crane/offshore applications.
• Motor Testing and Certification Services In-house testing facility with multiple test bed configurations capable of testing a variety of motors including medium voltage motors. Available for customer acceptance testing and classification society inspections.
• Motor Coating and Painting Services In-house paint booth for special corrosion protection coatings applied to motors. Multi-layer coating systems resistant to seawater, chemical vapors, and other corrosive media, with strict quality control and full traceability.

Quantifiable outcome

• 54 specialized motors delivered for subsea cable-laying vessel, with second collaboration on such project type
• +2 more outcomes

Named customers3 records

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration4 records

Feature7 records

Partnerships

Two partnerships are on record, tiered core.

• Remacut (NOV Group)coreStrategic or Co-development PartnerRotor worked closely with Remacut (part of the NOV Group) on a major subsea cable-laying vessel project. Rotor supplied 54 highly specialized motors for the vessel that will lay energy cables across the ocean floor. This marked Rotor's second collaboration on a vessel of this type, reinforcing its reputation as a trusted partner in the marine industry.
• WEG GroupcoreOthersRotor is part of the WEG Group, a major Brazilian multinational corporation specializing in electric motors and automation solutions. WEG provides global corporate backing while Rotor maintains local operations and brand identity.

Scale indicators8 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Marelli Motori: Italian manufacturer of electric motors and generators with strong specialization in marine, oil & gas, power generation, and industrial applications. Closely comparable to Rotor in product range, customization depth, marine certifications, and target customer base across similar end markets.
• Brook Crompton: UK-based industrial electric motor manufacturer with deep history in marine and industrial applications, offering IE2-IE4 efficiency motors. Comparable in size, product focus, and marine specialization to Rotor, with similar niche customization capabilities.
• SEW-Eurodrive: German manufacturer of drive technology, gear motors, and electric motors with strong European industrial and marine exposure. Comparable in customization depth, European customer base, and focus on integrated drive solutions for demanding applications.
• TECO-Westinghouse: Manufacturer of industrial electric motors including IEC standard, marine duty, and explosion-proof variants. Comparable product range, target industries (marine, oil & gas, industrial), and customization capabilities to Rotor, with overlap in efficiency class offerings.

Broad incumbents

• ABB (Motors & Generators): Global incumbent offering a comprehensive industrial motor portfolio including IEC standard, marine, and hazardous-area certified motors. Competes with Rotor across most product categories but serves a much broader customer base with a standardized global catalog rather than niche customization.
• Siemens (Innomotics): Major industrial motor manufacturer spun out from Siemens, offering IE2-IE5 efficiency motors across marine, industrial, and hazardous-area applications. Direct overlap with Rotor's product portfolio but at significantly larger scale with a global service network.
• Nidec Motors: Japanese multinational specializing in motors and electronics, with a strong European presence (including Leroy-Somer acquisition) serving industrial and marine applications. Competes with Rotor in IE3/IE4 standard motors and customized industrial drives.
• WEG Motors: Rotor's parent company and a major global electric motor manufacturer. While Rotor operates under the WEG umbrella, WEG's broader catalog and direct sales in some markets make it both a parent and the closest comparable direct competitor at the global level.
• Regal Rexnord: US-based diversified industrial manufacturer offering a broad range of electric motors, including IEC standard and marine-duty variants through brands like Marathon and Leeson. Comparable product portfolio but at much larger scale and broader geographic footprint than Rotor.

Emerging players

• CEMP (Regal Rexnord brand): Italian-based motor manufacturer under Regal Rexnord specializing in explosion-proof and hazardous-area motors (ATEX/IECEx). Direct overlap with Rotor's 6RD flameproof series and similar focus on hazardous-area industrial and marine applications.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/rotor-b.v.
• Facebookfacebook.com/Rotor-BV-Leeson-Electric-689636448087714

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Rotor