Sepac
SEPAC, Inc. is a privately held US manufacturer founded in 1984 that designs and builds precision electromagnetic clutches and brakes for OEM integration across aerospace, defense, aviation, robotics, medical, energy, and space applications.
- Company typePrivate
- Founded1984
- HeadquartersElmira, United States
- Headcount11–50
- GTM typeB2B
- OfferingHardware or Manufacturing
What Sepac does
SEPAC, Inc. is a privately held US manufacturer of precision electromagnetic clutches and brakes founded in 1984 and headquartered at 1580 Lake Street, Elmira, New York. The company designs and builds motion-control components that are integrated by OEMs into mission-critical systems across six vertical markets: Defense, Aviation, Robotics, Medical, Energy, and Space. Its product portfolio is organized along two axes — engagement style (spring-applied vs. magnetically-applied) and torque-transmission type (friction vs. tooth) — and is delivered through multiple branded series (SEB, TSEB, UTSEB, MSEB, SETB, MDB, PMB, METB for brakes; SECC, SETC, SFDC, RFDC, SFTC, RFTC, STCC, WMTC for clutches), with the SEB-Max™ Series representing its highest-specification aerospace and defense offering.
SEPAC sells through an enterprise field-sales motion using a Request-for-Quote pricing model — there is no public price list, and both standardized catalog units (1" to 4" diameters) and custom-engineered solutions are available. Revenue streams include hardware sales of clutches and brakes, non-recurring engineering for custom applications, and contract machining services. The company operates through acquired sub-brands Mach III, Placid Industries, Scientific Tool Co., and Lakeside Innovative Technologies, each targeting adjacent niches in motion control. Marketing is driven by a deep technical website (CAD downloads, torque calculator, eBooks, white papers), industry-specific 1-hour on-site seminars across five verticals, trade-show participation (Automate 2026), and a direct sales channel handling RFQs under multi-year contract cadences.
The company is positioned as a niche specialty manufacturer with deep domain expertise rather than a high-volume commodity supplier. Key technical differentiators include fail-safe power-OFF spring engagement, operating envelopes from -67°F to 158°F with up to 30g combined shock and vibration tolerance, Class H insulation, and low-power (28VDC release, 8VDC holding) designs. There is no public revenue disclosure, no outside funding, and no named customer logos in the source materials, though the product portfolio and vertical emphasis indicate exposure to defense primes, satellite integrators, robotics OEMs, and medical device manufacturers.
Sepac firmographics
Firmographics- Name
- Sepac
- Legal name
- SEPAC, Inc.
- Website
- https://sepac.com
- Company type
- Private
- Founded year
- 1984
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- SEPAC, Inc. is a privately held US manufacturer founded in 1984 that designs and builds precision electromagnetic clutches and brakes for OEM integration across aerospace, defense, aviation, robotics, medical, energy, and space applications.
- Ownership category
- akta.pro rank
Sepac industry classification
Industry- Product category
- Electromagnetic Motion Control Components
- NAICS
- Speed Changer, Industrial High-Speed Drive, and Gear Manufacturing (333612), Electrical Equipment Manufacturing (33531)
- SIC
- Electrical Industrial Apparatus (3620), Electronic Components & Accessories (3670)
- akta.pro primary industry
- Brakes, Clutches & Couplings (Electromagnetic Brakes, Torque Limiters) (IMAGACAK)
Keywords
Where Sepac is headquartered
LocationHeadquarters
- HQ city
- Elmira
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
Sepac business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Operations, Supply Chain, Personnel, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- Precision Electromagnetic Brakes: Sale of spring-applied and magnetically-applied electromagnetic brakes in various configurations (friction and tooth type) for OEM integration into customer applications.
- Precision Electromagnetic Clutches: Sale of electromagnetic clutches including spring-applied and magnetically-applied variants in multiple engagement styles.
- Custom Solutions Engineering: Non-recurring engineering services and custom product development for specific OEM application requirements. Terms and conditions for NRE services are documented on their website.
- Contract Machining Services: Precision machining services offered as part of their manufacturing capabilities, potentially available to external customers.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Unit Pricing | Multi-year contract | Standard catalog products with ready-to-order units |
Go-to-market motion1 record
Distribution channels1 record
Marketing channels8 records
Sepac product offering
Product offeringCore offering
SEPAC manufactures precision electromagnetic clutches and brakes designed for integration into OEM applications. Products are offered in spring-applied and magnetically-applied engagement styles and in friction-type and tooth-type torque transmission configurations, serving defense, aviation, robotics, medical, energy, and space industries. The company complements its catalog of standardized units (including the SEB-Max™ Series) with custom engineering solutions and contract machining services.
Product overview
SEPAC is a manufacturer of precision electromagnetic clutches and brakes for integration into OEM applications. The product portfolio includes two primary device types: electromagnetic brakes and electromagnetic clutches. These products are categorized by engagement style (Spring Applied and Magnetically Applied) and torque transmission type (Friction Type and Tooth Type). The brake product lines include SEB-Max™ Series (high-performance aerospace-grade), SEB, TSEB, UTSEB, and MSEB (all friction type), plus SETB (tooth type). Magnetically applied brake options include MDB, PMB, and METB. The clutch portfolio includes SECC and SETC (spring applied tooth type), plus SFDC, RFDC, SFTC, RFTC, STCC, and WMTC (magnetically applied in both friction and tooth configurations). The company also maintains sub-brands Mach III and Placid Industries. Products serve industries including defense, aviation, robotics, medical, energy, and space.
Differentiator
Problem solved
Functional benefit
Brands
- Mach III: Brand offering motion control products and machining services.
- Placid Industries
Products and services
- SEB-Max™ Series High-performance spring-applied friction brake line engineered for aerospace and defense applications, featuring standardized units from 1" to 4" diameters with torque ratings up to 30g combined shock and vibration, Class H insulation, and operating range of -67°F to 158°F. Designed for OEM integration into mission-critical platforms such as helicopters, satellites, missiles, and military aircraft.
- SEB Series Spring-applied friction brake designed to engage when power is removed or not applied.
- TSEB Series Spring-applied friction brake series for OEM integration.
- UTSEB Series Spring-applied friction brake series for OEM integration.
- MSEB Series Spring-applied friction brake series for OEM integration.
- SETB Series Spring-applied tooth brake designed to engage when power is removed or not applied, using positive mechanical tooth engagement without friction materials.
- MDB Series Magnetically-applied friction brake designed to engage when power is applied.
- PMB Series Magnetically-applied friction brake series for OEM integration.
- METB Series Magnetically engaged tooth brake series for OEM integration.
- SECC Series Spring-applied tooth clutch series for OEM integration.
- SETC Series Spring-applied tooth clutch series for OEM integration.
- SFDC Series Magnetically-applied friction clutch series for OEM integration.
- RFDC Series Magnetically-applied friction clutch series for OEM integration.
- SFTC Series Magnetically-applied tooth clutch series for OEM integration.
- RFTC Series Magnetically-applied tooth clutch series for OEM integration.
- STCC Series Magnetically-applied tooth clutch series for OEM integration.
- WMTC Series Magnetically-applied tooth clutch series for OEM integration.
- Custom Solutions Engineering Non-recurring engineering and custom product development services that tailor electromagnetic clutches and brakes to specific OEM application requirements.
- Contract Machining Services Precision machining services offered by SEPAC, potentially available to external customers in addition to supporting in-house manufacturing.
- Mach III Brand under the SEPAC corporate umbrella offering clutches, brakes, and machining services for motion control applications.
- Placid Industries Brand under the SEPAC corporate umbrella offering industrial clutches, brakes, and machining services.
Quantifiable outcome
- Operating temperature range from -67°F to 158°F enables deployment in extreme environments
- +3 more outcomes
Companies that use Sepac
Customer profileSegments6 records
Ideal customer profiles5 records
Sepac technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature5 records
Sepac partnerships and signals
Strategic signalPartnerships
Two partnerships are on record, tiered minor.
- Mach IIIminorMach III is a brand under the SEPAC corporate umbrella, offering specialized motion control products. Website link: machiii.com
- Placid IndustriesminorPlacid Industries is a brand under the SEPAC corporate umbrella, offering specialized motion control products. Website link: placidindustries.com
Scale indicators3 records
Recent moves5 records
Expansion highlights5 records
Sepac competitors and assessment
Company assessmentDirect peers
- Warner Electric: Warner Electric (part of Altra Industrial Motion) is a leading manufacturer of electromagnetic clutches, brakes, and tensioning systems. Directly comparable to SEPAC as a specialty electromagnetic motion control supplier serving industrial, aerospace, and defense customers.
- Inertia Dynamics: Inertia Dynamics (also part of Altra Industrial Motion) designs and manufactures electromagnetic clutches, brakes, and clutch/brake controls. Directly comparable to SEPAC's core product lines and target applications.
- Ogura Industrial: Ogura Industrial is a Japanese manufacturer of electromagnetic clutches and brakes with global reach across industrial, automotive, and aerospace markets. Comparable to SEPAC as a direct competitor in precision electromagnetic motion control.
- Kendrion: Kendrion develops and manufactures electromagnetic actuators, clutches, and brakes for industrial, automotive, and aerospace applications. Directly comparable to SEPAC's electromagnetic brake and clutch portfolio.
- Carlisle Brake & Friction: Carlisle Brake & Friction (a Carlisle Company) supplies friction products, brakes, and clutch components into aerospace, defense, and industrial markets. Directly comparable to SEPAC in mission-critical brake applications.
- Miki Pulley: Miki Pulley manufactures electromagnetic clutches and brakes plus related motion control components for industrial automation globally. Comparable to SEPAC as a direct electromagnetic clutch and brake peer, particularly for industrial/automation customers.
Broad incumbents
- Moog Inc. Moog is a broad motion control and aerospace systems supplier with electromagnetic actuation expertise serving defense and commercial aerospace. Comparable to SEPAC in aerospace motion control but operating at much larger scale and scope.
- Parker Hannifin: Parker's motion technologies group supplies clutches, brakes, and motion control components globally, including into aerospace/defense. Broad incumbent with overlapping electromagnetic component offerings relative to SEPAC.
- Eaton Aerospace: Eaton's Aerospace division provides hydraulic, electromechanical, and motion control systems for commercial and military aircraft. Broad incumbent with overlapping motion control content on platforms where SEPAC competes.
- GKN Aerospace: GKN Aerospace is a tier-one aerostructures and systems supplier with motion control content on military and commercial aircraft. Broad incumbent relevant to SEPAC's aerospace vertical though not a direct electromagnetic clutch specialist.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat4 records
Key risks6 records
Key highlights6 records
Customer concentration
Sepac social profiles
Digital presenceSepac financial estimates
Financial estimateRevenue estimate
Valuation estimate
Sepac leadership team
Management profileNumber of profiles
Sepac subsidiaries and ownership
Company hierarchySubsidiaries4 records
Sepac funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Sepac M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Sepac
What does Sepac do?
SEPAC manufactures precision electromagnetic clutches and brakes designed for integration into OEM applications. Products are offered in spring-applied and magnetically-applied engagement styles and in friction-type and tooth-type torque transmission configurations, serving defense, aviation, robotics, medical, energy, and space industries. The company complements its catalog of standardized units (including the SEB-Max™ Series) with custom engineering solutions and contract machining services.
Is Sepac a public or private company?
Sepac is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Sepac founded?
Sepac was founded in 1984. It employs 11 to 50 people.
Where is Sepac based?
Sepac is headquartered in Elmira, United States, in the North America region.
How does Sepac make money?
Four revenue lines are on record. Precision Electromagnetic Brakes are the primary driver. The others are precision Electromagnetic Clutches, custom Solutions Engineering and contract Machining Services.
Who are Sepac's main competitors?
Direct peers on record are Warner Electric, Inertia Dynamics, Ogura Industrial, Kendrion, Carlisle Brake & Friction and Miki Pulley. Broad incumbents are Moog Inc., Parker Hannifin, Eaton Aerospace and GKN Aerospace.
Does Sepac have an API?
No public API is recorded for Sepac.
What industry is Sepac in?
Sepac's product category is Electromagnetic Motion Control Components. Its primary akta.pro industry code is IMAGACAK, Brakes, Clutches & Couplings (Electromagnetic Brakes, Torque Limiters). Its NAICS code is 333612 and its SIC code is 3620.