What Kay Industries does

Kay Industries is a privately held Indiana-based manufacturer that designs, builds, and markets electrical phase converters converting single-phase utility power into balanced three-phase power for industrial, commercial, agricultural, and institutional end users. Its product portfolio spans three converter families — rotary (Phasemaster MA-R, TMA, TMA-480v, Tandem, Parallel), digital solid-state (PhasePerfect and E-Phase Perfect, 1%–2% voltage balance), and static (Miniphase) — priced from approximately $250 to $25,000 per unit, complemented by Kandlestick boost-start capacitors, Hawk Transformers (via a Hammond Power Solutions alliance), and, since 2026, AMG Bolting hydraulic torque equipment. The company is the exclusive manufacturer of the Phasemaster brand, which has been continuously sold since 1960 and is protected by three U.S. patents and one Canadian patent.

Revenue is generated predominantly through one-time hardware sales supplemented by repair services ($175/hour plus parts) and custom engineering for defense, marine, rail, and oil & gas applications. Go-to-market is sales-led, combining direct phone-based technical selling and field support (800-348-5257) with a distributor network of 250+ locations across 50 U.S. states, 4 Canadian provinces, and South America, plus e-commerce on kayind.com and announced Amazon, eBay, and Walmart storefronts. Free expert sizing consultation is positioned as a core differentiator. Customer segments are deliberately diversified across EV charging, broadcasting, manufacturing/CNC, agriculture (center pivot irrigation), healthcare imaging, HVAC/elevators, food service, and oil & gas.

The company is closely held; entrepreneur Rob Rohena acquired 100% of stock in 2022 to address ongoing financial difficulties and the retirement of the Katz family and long-time General Manager Gregory Shroff. Under new ownership, Kay Industries has pursued an aggressive repositioning: the Daelim Electric international infrastructure partnership (January 2026), the AMG Bolting Solutions acquisition (2026), the Hammond Power Solutions transformer alliance (2025), and R&D partnerships with NAPCES and Phazpak Technologies targeting AI- and IoT-enabled phase conversion. Headcount remains in the 1–10 range, and the company operates from three Indiana facilities (Nappanee headquarters, Plymouth technical center, Monroe warehouse).

Name

Kay Industries

Legal name

Kay Industries Inc.

Website

https://kayind.com

Company type

Private

Founded year

1972

Operating status

Operating

Headcount range

1–10 employees

Short description

Kay Industries manufactures rotary, static, and digital phase converters that transform single-phase into three-phase power for industrial, agricultural, commercial, and institutional customers in North and South America, selling through direct sales, 250+ distributors, and e-commerce under the Phasemaster brand.

Ownership category

akta.pro rank

Product category

Power Conversion Equipment

NAICS

Power, Distribution, and Specialty Transformer Manufacturing (335311), Switchgear and Switchboard Apparatus Manufacturing (335313), Relay and Industrial Control Manufacturing (335314)

SIC

Electrical Industrial Apparatus (3620), Power, Distribution & Specialty Transformers (3612), Motors & Generators (3621)

akta.pro primary industry

Grid-Scale Power Conversion & Interconnection (PCS, Grid-Tie Inverters, Converter Stations) (IMAGAAAI)

akta.pro secondary industries

Transformers (Power, Distribution, Instrument, Specialty) (IMAGAAAA), Low-Voltage Switchboards & Panelboards (LV distribution panels, MCCs, switchboards) (IMAGAEAA)

Keywords

• Rotary phase converters
• Digital phase converters
• Static phase converters
• Industrial transformers
• Three-phase power conversion

Headquarters

HQ city

South Bend

HQ country

United States

HQ region

North America

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Phase Converter Hardware Sales: Primary revenue stream from manufacturing and selling rotary, static, and digital phase converters. Products include Phasemaster® MA-R series (240V), TMA series (480V), and E-Phase™ digital converters. Pricing ranges from $250-$750 (static), $600-$10,000 (rotary), $2,500-$25,000 (digital).
2. Phase Converter Repair Services: Repair and refurbishment services for NAPCES, Buffington-Payne, and Phasemaster rotary phase converters. Repair services priced at $175 per hour plus parts.
3. Custom Design and Manufacturing: Custom phase converter design and manufacturing services including defense-grade military converters, yacht converters, RV stationary converters, and portable solutions for rail, shipbuilding, and oil & gas industries.
4. Capacitor Banks and Power Packs: Design, build, and modification of capacitor banks and electric power distribution power packs in partnership with Aerovoxus™, Kandlestick®, and Phazpak™ Technologies.

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels6 records

Core offering

Kay Industries manufactures and sells single-phase to three-phase power conversion equipment under brands including Phasemaster® (rotary), Miniphase™ (static), and E-Phase™/PhasePerfect® (digital). The company also offers Hawk Transformers, Kandlestick™ capacitors, and AMG Bolting hydraulic torque equipment, providing a unified electro-hydraulic ecosystem for industrial, agricultural, commercial, and infrastructure customers needing three-phase power where only single-phase utility service is available.

Product overview

Kay Industries operates as a unified electro-hydraulic ecosystem offering three main categories of phase converters—rotary (Phasemaster® MA-R, TMA, TMA-480v, Tandem, Parallel), digital (PhasePerfect® and E-Phase Perfect®), and static (Miniphase™)—alongside complementary products including Hawk Transformers, Kandlestick™ capacitors, AMG Bolting hydraulic equipment, and 3-phase hydraulic power packs. The company provides comprehensive services including custom converter design, repair/refurbishment, and capacitor bank customization. This modular portfolio enables customers to source complete single-to-three phase power conversion solutions, from entry-level static converters to sophisticated digital systems with transformers and torque equipment, all backed by the Phasemaster® brand legacy since 1960.

Differentiator

Problem solved

Functional benefit

Brands

• Phasemaster®: Flagship rotary three-phase converter brand. World-renowned name in rotary three-phase conversion since 1960. Models include MA-R, TMA, TMA-480v, Tandem Bundle, and Parallel System configurations.
• Miniphase™
• Kandlestick®
• Hawk Transformers
• E-Phase™
• Phazpak Technologies

Products and services

• Phasemaster® MA-R Series Rotary Phase Converters Flagship 240V rotary phase converter line that converts single-phase utility power to balanced three-phase power with a 2-wire in, 3-wire out design. Features cast-iron TEFC induction generators, NEMA 3R enclosures, and Kandlestick start-boost capacitors. Available in HP ratings from 1.33 HP (SD-60-R) up to 20 HP (MA-4-R).
• Phasemaster® TMA Series with Auto Controls Rotary phase converters with integrated automatic controls for HVAC applications, featuring temperature-sensing automatic control capabilities co-developed in partnership with North American Rotary.
• Phasemaster® TMA-480v Series 480-volt rotary phase converters designed for agricultural and industrial 480V applications, co-developed with North American Rotary for enhanced efficiency with larger equipment.
• Phasemaster® Tandem Bundle Dual rotary phase converter configuration designed for cold weather environments and applications requiring enhanced power capacity.
• Phasemaster® Parallel System Multiple rotary phase converters configured in parallel for high-capacity applications requiring redundant power or expanded output.
• PhasePerfect® 5 HP Digital Phase Converter Entry-level solid-state digital phase converter providing utility-quality 3-phase power from a single-phase source. Features 98.7% efficiency, NEMA 1 or 3R enclosure options, 187V-260V voltage range, 60Hz frequency.
• E-Phase Perfect® PT007R-H3 Digital Phase Converter All-electronic digital phase converter using solid-state technology for 1%-2% voltage balance. NEMA Type 3R outdoor-rated enclosure, capable of powering any load including sensitive electronics. The world's only all-electronic digital phase converter at this precision level.
• Miniphase™ Static Phase Converter Compact static phase converter using capacitors and relays to simulate the third phase for starting motors. Most affordable 1-to-3 phase conversion solution, best suited for single-motor applications with non-continuous loads and hydraulic mechanicals. Typically priced $250-$750.
• Hawk Transformers Customized heavy-duty distribution transformers, isolation transformers, and step-up/step-down units offered through the partnership with Hammond Power Solutions. Optimizes site power distribution and provides galvanic isolation for EV infrastructure, data centers, and industrial applications.
• AMG Bolting Solutions Hydraulic Torque Wrenches High-precision hydraulic torque wrenches, pneumatic bolting tools, and digital calibration equipment for securing heavy electrical structural infrastructure. Acquired by Kay Industries in 2026.
• 3-Phase Hydraulic Power Packs Mobile hydraulic power pack solutions developed in partnership with AMG Bolting Solutions for rail, shipbuilding, and oil & gas industries.
• Custom Phase Converter Design Services Engineering and manufacturing of unique phase converters for specialized applications including defense-grade converters for military, large converters for land-use yachts, and stationed RV living quarters.
• Rotary Phase Converter Repair Services Repair and refurbishment services for NAPCES Phase Converters, Buffington-Payne Converters, and Phasemaster rotary phase converters. Includes bearing replacement services via AMG. Priced at $175 per hour plus parts.
• Capacitor Banks & Power Distribution Custom capacitor bank design and modification services built in partnership with Aerovoxus, Kandlestick, and Phazpak Technologies for commercial power distribution applications.

Quantifiable outcome

• 12-18 month utility delay eliminated for 3-phase grid access
• +4 more outcomes

Named customers14 records

Segments8 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Ten partnerships are on record, tiered core and minor.

• Daelim Electric and Hydraulic TechnologiescoreStrategic or Co-development Partner · 1 January 2025Monumental international infrastructure partnership signed in January 2026. Pairs Kay Industries' precision engineering with Daelim's world-class transformer manufacturing and specialized fluid power engineering. Vastly scales production capacity and expands global supply chain for the unified electro-hydraulic matrix ecosystem.
• Hammond Power SolutionscoreStrategic or Co-development Partner · 1 January 2025Strategic alliance established in 2025 for high-performance industrial transformers. Through this partnership, Kay Industries offers specialized transformer lines under the proprietary Hawk Transformers brand. Enables full power infrastructure capabilities within the Kay Industries ecosystem.
• Phase TechnologiescoreStrategic or Co-development PartnerPartnership to co-offer cutting-edge E-Phase Perfect All-Electronic digital phase converter. Brings true solid-state digital precision to the modern grid. Phase Perfect is the world's only digital phase converter with 1%-2% voltage balance.
• North American RotarycoreStrategic or Co-development PartnerLandmark 'coopetition' partnership (cooperation + competition) to co-develop advanced 480V panel designs and temperature-sensing automatic controls for HVAC applications. Kay Industries secured first right of refusal option to acquire North American Rotary in the future. TMA-480v converter development joint effort.
• Phazpak TechnologiescoreStrategic or Co-development PartnerExclusive partnership with first right of refusal option to buy the entire company. Phazpak technology deployed inside Kay's proprietary boost-start capacitor line branded as Kandlestick™. Both companies are owned by Rohenas but operate separately with distinct product lines.
• NAPCESminorStrategic or Co-development PartnerR&D partnership to develop next major advancements in 3-Phase Conversion via static, rotary, and electronic technologies using Ai and IoT technology.
• Parrish ElectricminorStrategic or Co-development PartnerWorking relationship established as part of collaborative efforts to introduce new phase converter models (WMA, TMA, TPI).
• Bruce ElectricminorChannel Partner/ Reseller/ DistributorAmerican third-party resource for transformers sold by Kay Industries. Located in Lindenhurst, New York. Represents Kay products through electrical supply distribution.
• Graybar ElectricminorChannel Partner/ Reseller/ DistributorNational electrical supply distributor that refers customers to Kay Industries when phase conversion expertise is needed. Located at 1760 Cesar Chavez Street, San Francisco.
• AMG Bolting SolutionscoreTechnology or IntegrationFully acquired in 2026. Essential distributor for industrial torque equipment in oil & gas sector. Diversifies Kay Industries' technical capabilities into heavy industrial bolting, fluid management, and torque precision systems. AMG PL-60-AC sold through Kay Industries. Manufacturing facilities in Wisconsin and Indiana.

Scale indicators6 records

Recent moves10 records

Expansion highlights8 records

Broad incumbents

• ABB: Global electrification and motion leader; ABB's 2010 acquisition of Baldor introduced 3-phase-ready motors that reduced barriers in the converter market, and ABB offers drives, motors, and power conversion at industrial scale.
• Eaton: Global power management giant offering transformers, switchgear, power conversion, and UPS systems; overlaps with Kay's transformer line via Hammond partnership and competes in industrial power distribution broadly.

Emerging players

• Hammond Power Solutions: Transformer manufacturer partnered with Kay under the Hawk Transformers brand; supplies dry-type transformers across industrial and EV charging applications overlapping with Kay's distribution transformer offerings.
• Phazpak Technologies: Sister company under common Rohena ownership making agricultural, petroleum, and military defense phase capacitors and converters; Kandlestick brand deploys Phazpak technology inside Kay products.

Direct peers

• TEMCo Phase Converters: Direct online competitor offering rotary and static phase converters at lower price points; competes for SMB and individual buyer segments overlapping with Kay's Miniphase and MA-R lines.
• RONK Electrical Industries: Long-established manufacturer of phase converters, capacitors, and electrical equipment for agricultural, industrial, and commercial applications; competes directly with Kay in rotary and static converter categories.
• North American Rotary: Direct competitor in rotary phase converters with overlapping 480V product lines; Kay has a 'coopetition' partnership and first right of refusal to acquire North American Rotary, blurring competitor and partner status.
• American Phase Converters: Specialty manufacturer of rotary and static phase converters serving industrial, agricultural, and woodworking markets with comparable product positioning and pricing to Kay.
• Phase Technologies: Maker of Phase Perfect digital phase converters, the primary competitor in the digital phase conversion segment. Kay Industries co-markets Phase Perfect through its E-Phase division while also selling competing rotary units.

Others

• AMG Bolting Solutions: Industrial hydraulic torque and bolting equipment company fully acquired by Kay Industries in 2026; adjacent rather than competing—extends Kay's electro-hydraulic ecosystem into oil & gas torque applications.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks7 records

Key highlights7 records

Customer concentration

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries2 records

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 Kay Industries