What Ringfeder Power Transmission Group does

RINGFEDER POWER TRANSMISSION GMBH is a German mechanical engineering and niche-market industrial components manufacturer headquartered in Groß-Umstadt, Hesse, Germany. Founded in 1922 and operating as a wholly-owned subsidiary of Swedish industrial conglomerate VBG Group AB (publ.), the company designs, manufactures, and sells shaft-hub connections (locking assemblies, shrink discs, locking elements), damping components (friction springs, industrial buffers, DEFORM plus shock absorbing elements), and a comprehensive range of couplings (elastomer jaw, metal bellows, steel disc, gear, barrel, flange, pin & bush, tyre, torsional highflex, safety) together with combined coupling-brake systems (TZS). It serves applications in machines and plants, drives, aviation and aerospace, energy (including hydro power), process technology, and extraction (mining, steel, port/container handling).

The company's technology core is precision mechanical engineering for torque transmission, shaft-hub connection, vibration damping, overload protection, and structural safety. Proprietary products include maintenance-free friction-fit locking assemblies, friction-spring cross-bracing for earthquake protection of buildings and critical infrastructure, and safety couplings for overload protection. The portfolio spans demanding specifications including stainless-steel variants for hygiene/corrosion environments and bending-load-capable locking assemblies. Multiple acquired brands (HENFEL for hydrodynamic couplings and industrial brakes; MALMEDIE for heavy-industry couplings; RATHI TRANSPOWER for the Indian market) are retained and integrated under the RINGFEDER® corporate brand.

The business model is direct enterprise B2B hardware sales of engineered components, supported by application-engineering consultation. Pricing is quote-based and not publicly disclosed. Go-to-market combines a direct sales force (request forms, email [email protected], telephone, video consultation) with a global network of distribution partners and representatives across Africa, Asia, Australia/New Zealand, Europe, North and South America, and China. Registered customer and distributor accounts access CAD data and engineering calculation programs, embedding the supplier into OEM design workflows. Marketing channels include a technical blog (The Engineer's Blog), LinkedIn, Xing, Twitter, YouTube, newsletters, a multi-language download center, and industry events. Certifications include ISO 14001:2015 (environmental management), Cyber Essentials, and AEO (customs/trade facilitation).

Name

Ringfeder Power Transmission Group

Legal name

RINGFEDER POWER TRANSMISSION GMBH

Website

https://ringfeder.com

Company type

Private

Founded year

1922

Operating status

Operating

Headcount range

251–500 employees

Short description

Ringfeder Power Transmission is a 1922-founded German niche-market manufacturer of mechanical power transmission and damping components (locking assemblies, couplings, friction springs, brake systems). It serves enterprise OEMs across aerospace, energy, mining, steel, process technology, and industrial machinery worldwide.

Ownership category

akta.pro rank

Product category

Mechanical Power Transmission and Damping Components

NAICS

Mechanical Power Transmission Equipment Manufacturing (333613), Engine, Turbine, and Power Transmission Equipment Manufacturing (3336)

SIC

Bolts, Nuts, Screws, Rivets & Washers (3452)

akta.pro primary industry

Linear Motion & Mechanical Power Transmission (Ball/roller screws, linear guides, bearings, couplings) (IMAHAGAM)

akta.pro secondary industry

Brakes, Clutches & Couplings (Electromagnetic Brakes, Torque Limiters) (IMAGACAK)

Keywords

• Power transmission components
• Shaft-hub locking assemblies
• Industrial damping components
• Mechanical couplings
• Drive technology components

Headquarters

HQ city

Groß-umstadt

HQ country

Germany

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Industrial Components Sales: RINGFEDER POWER TRANSMISSION develops, manufactures, and supplies mechanical power transmission and damping components including locking assemblies, shrink discs, couplings, friction springs, and brake systems to industrial customers worldwide. Revenue is generated through direct product sales to manufacturers and operators in various industrial sectors.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels8 records

Core offering

RINGFEDER Power Transmission develops, manufactures, and supplies mechanical power transmission and damping components, including friction-fit shaft-hub connections (Locking Assemblies, Shrink Discs, Locking Elements), damping components (Friction Springs, Industrial Buffers, Shock Absorbing Elements DEFORM plus), and a broad couplings portfolio (Elastomer Jaw, Metal Bellows, Steel Disc, Gear, Barrel, Flange, Pin & Bush, Tyre, Torsional Highflex, Safety, and Coupling-Brake Systems TZS), along with industrial brake systems and bearing housings, sold to industrial OEMs and plant operators worldwide.

Product overview

RINGFEDER POWER TRANSMISSION is an international market leader in niche markets of drive and damping technology. The company develops, manufactures and supplies superior Shaft-Hub Connections (Locking Assemblies RFN series, Shrink Discs, Locking Elements), Damping Components (Friction Springs, Industrial Buffers, Shock Absorbing Elements DEFORM plus), and a comprehensive range of Couplings including Elastomer Jaw Couplings (GWE, TNM, TNS, TNB, ECE, RLES), Metal Bellows Couplings (GWB), Steel Disc Couplings (TND), Gear Couplings (TNZ), Barrel Couplings (TNK), Flange Couplings (TNF), Pin & Bush Couplings (RLB, RLP), Tyre Couplings (RLT, RLU), Torsional Highflex Couplings (TNR), Safety Couplings (TNT), and the newly launched Coupling-Brake Systems (TZS). These products are used for highest requirements on functionality and reliability across diverse technology sectors including machines and plants, drives, aviation and aerospace, energy, process technology, and extraction industries worldwide.

Differentiator

Problem solved

Functional benefit

Brands

• RINGFEDER®: Premium brand for shaft-hub connections, damping components, couplings, brake systems and bearing housings serving industrial applications worldwide.
• HENFEL®
• M.A.T. MALMEDIE ANTRIEBSTECHNIK
• RATHI TRANSPOWER

Products and services

• Locking Assemblies Friction-fit shaft-hub connection components providing freedom from wear and maintenance, easy installation, and backlash-free torque transmission for power transmission applications in industrial machinery.
• Locking Assemblies for Bending Loads (RFN 7012.2) Specialized locking assemblies designed to handle combined torque and bending moment loads in shaft-hub connections, for applications with non-purely torsional loading.
• Locking Assemblies Stainless Steel (RFN 7013.0, RFN 7013.1) Corrosion-resistant stainless steel locking assemblies for applications requiring hygiene standards or exposure to corrosive environments, including food/beverage and process industries.
• Shrink Discs (RFN 4051, RFN 4061, RFN 4071, RFN 4073, RFN 4091, RFN 4161, RFN 4181) Shaft-hub connections using shrink-fit technology (thermal contraction) for high load capacity and backlash-free torque transmission in heavy machinery applications.
• Locking Elements (RfN 8006) Versatile locking elements for shaft-hub connections with easy installation and maintenance-free operation.
• Friction Springs Maintenance- and wear-free friction-based spring elements providing effective damping and energy absorption, also used as Cross-Bracing for earthquake protection in buildings and critical infrastructure.
• Industrial Buffers Industrial damping components for absorbing shocks and vibrations in machinery and plant applications.
• Shock Absorbing Elements DEFORM plus Advanced industrial shock absorbing elements for protection of machinery and structures against dynamic and seismic loads, including earthquake damage protection in critical infrastructure.
• Elastomer Jaw Couplings GWE, TNM, TNS, TNB, ECE, RLES Flexible couplings using elastomer elements to provide vibration damping, misalignment compensation, and backlash-free torque transmission across multiple series for various industrial drive applications.
• Metal Bellows Couplings GWB (AK, AKD, AKN, DKN, CKN, EKN, PKA, Z5106) Precision couplings with metal bellows design enabling high misalignment compensation while maintaining zero-backlash torque transmission for demanding precision applications.
• Steel Disc Couplings TND (HSH, HDH, HDV, VDV, OCO, XSX, XDX, QCQ) High-performance disc couplings providing precise torque transmission with excellent durability for heavy-duty industrial applications.
• Gear Couplings TNZ (ZCA, ZCB, ZCAU, ZCBU, ZCAUU, ZCBUU, ZCAF, ZCBF, ZCAK, ZCBK, ZCAV, ZCBV, ZCAZ, ZCBZ, ZCH variants) Robust gear couplings designed for high torque transmission in heavy machinery, mining, steel industry, and crane applications.
• Barrel Couplings TNK (TKVO) Barrel-shaped flexible couplings for applications requiring angular and parallel misalignment compensation with reliable torque transmission.
• Flange Couplings TNF 5571 Flange-type rigid couplings for direct mounting to equipment flanges, providing secure torque transmission in industrial machinery.
• Pin & Bush Couplings RLB & RLP Durable pin and bush couplings ensuring maximum operational reliability even under extreme operating conditions in machines and plants.
• Tyre Couplings RLT & RLU Flexible tyre couplings using rubber elements for excellent vibration damping and misalignment accommodation in drive systems.
• Torsional Highflex Couplings TNR (2424.1, 2424.2, 2425.1, 2425.2, 2428.1, 2428.2) High-flexibility couplings specifically designed to dampen torsional vibrations in drive systems for smooth operation.
• Safety Couplings TNT (2420, 2424, 2425) Overload protection couplings (torque-limiting) that disengage torque transmission when preset limits are exceeded, protecting machinery from damage.
• Coupling-Brake Systems TZS Innovative combined coupling and brake systems integrating efficient power transmission with reliable braking for maximum operational safety in cranes, hoists, and elevators.

Segments6 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature11 records

Partnerships

Three partnerships are on record, tiered core.

• M.A.T. MALMEDIE ANTRIEBSTECHNIK GMBHcoreStrategic or Co-development Partner · 1 July 2025As of July 1, 2025, RINGFEDER POWER TRANSMISSION acquired M.A.T. MALMEDIE ANTRIEBSTECHNIK GMBH based in Solingen, Germany. The leading drive technology specialist develops, manufactures and supplies a comprehensive portfolio of innovative coupling solutions, particularly for advanced applications in heavy machinery construction, in the mining and steel industry as well as in crane and hoist facilities for port and container handling.
• RATHI TRANSPOWER PVT. LTD.coreStrategic or Co-development PartnerIndia-based RATHI TRANSPOWER PVT. LTD. has joined RINGFEDER POWER TRANSMISSION. This acquisition further strengthens the leading power transmission portfolio by adding high-quality flexible, rigid, fluid and tyre couplings for advanced industrial applications.
• VBG Group AB (publ.)coreOthersVBG Group AB (publ.) is the parent company that owns and manages the domains for RINGFEDER POWER TRANSMISSION websites. The Data Protection Officer is contactable through VBG Group.

Scale indicators3 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• R+W Coupling Technology: R+W is a precision couplings specialist (servo, metal bellows, elastomer, torque-limiting) with a comparable product mix to Ringfeder's elastomer jaw, metal bellows, and safety coupling families, targeting similar automation and motion-control OEM customers.
• Mayr Power Transmission: Mayr is a German maker of safety clutches, safety brakes, and torque limiters serving elevators, cranes, and industrial machinery; its overlap with Ringfeder's TNT safety couplings and TZS coupling-brake systems makes it a direct functional peer in the same end markets.
• Huco Dynatork: Huco Dynatork manufactures precision couplings, including elastomeric, universal joint, and miniature types, which overlap directly with Ringfeder's elastomer jaw and metal bellows coupling lines for industrial drive applications.
• KTR Systems: KTR Systems is a German-headquartered manufacturer of mechanical power transmission components including couplings, clamping sets, brake systems, and torque limiters, with an industrial customer base and product breadth that closely mirrors Ringfeder's locking assemblies, couplings, and brake portfolio.

Broad incumbents

• Regal Rexnord (Power Transmission Solutions): Regal Rexnord's Power Transmission Solutions segment (formerly Thomas XTR, Kop-Flex, Falk) supplies couplings, gearing, and bearings globally — a broad incumbent with deep competition to Ringfeder's couplings and locking assembly products in industrial markets.
• Bonfiglioli: Bonfiglioli is an Italian global manufacturer of gearmotors, gearboxes, and drive solutions; it competes with Ringfeder on industrial drive applications, particularly where couplings integrate with planetary and helical gearboxes for OEM machinery.
• SEW-Eurodrive: SEW-Eurodrive is a leading manufacturer of drive systems, gearmotors, electronics, and couplings; its couplings portfolio (including elastomer and gear types) competes with Ringfeder in factory automation and conveyor systems.
• Voith: Voith is a large diversified industrial group with couplings, hydrodynamic drives, and braking technology; its hydrodynamic coupling offering overlaps with Henfel's HENFLUID line within Ringfeder's portfolio, while serving similar heavy-duty applications.
• Eaton (Industrial Clutches & Brakes): Eaton manufactures industrial clutches, brakes, and power transmission components used in heavy industry; its industrial clutch and brake portfolio directly overlaps with Ringfeder's safety couplings (TNT) and coupling-brake systems (TZS).
• Flender (a Siemens Company): Flender, owned by Siemens, is a global leader in mechanical drives (gear couplings, gearboxes, planetary, helical) — broader portfolio than Ringfeder but directly overlaps on heavy-duty gear couplings (TNZ) and locking assemblies used in mining, cement, and power generation.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xtwitter.com/RingfederPower
• YouTubeyoutube.com/user/ringfederRPT
• LinkedInlinkedin.com/company/ringfeder-power-transmission

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Subsidiaries3 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 Ringfeder Power Transmission Group