GRW Bearing GmbH
GRW Bearing GmbH is a German manufacturer of miniature and high-precision ball bearings, headquartered in Rimpar and operating as a subsidiary of Kaman Corporation. It serves healthcare, aerospace, and industrial customers with customized bearing solutions engineered for extreme temperatures, high speeds, and corrosive or vacuum environments.
- Company typePrivate
- Founded1945
- HeadquartersRimpar, Germany
- Headcount1–10
- GTM typeB2B
- OfferingHardware or Manufacturing
What GRW Bearing GmbH does
GRW Bearing GmbH (legally Gebr. Reinfurt GmbH & Co. KG) is a German manufacturer of miniature and high-precision ball bearings, headquartered in Rimpar, Germany, with a second production and assembly site in Prachatice, Czech Republic (REINFURT-ČR, k.s.). The company is a wholly owned subsidiary of the US-listed industrial conglomerate Kaman Corporation (NASDAQ: KAMN), which provides financial backing and distribution reach. GRW sells customized and standard bearing solutions — including radial deep groove bearings, spindle ball bearings, duplex and axial bearings, special bearings, pre-assembled bearing units, and accessories such as wave spring washers and retaining rings — plus specialized testing technology such as dental test benches. Its products are engineered for extreme operating conditions, with stated capability from −270 °C to +450 °C, speeds up to 500,000 min⁻¹, corrosion resistance, radiation tolerance, and dry-lubrication for vacuum environments.
The company serves three primary verticals: healthcare/medical technology (dental handpieces, surgical instruments), aerospace and defense (civil aviation, space, turbomolecular pumps, jet engines), and industrial manufacturing (machine tools, spindles, e-motors, robotics and automation, vacuum technology, automotive, pharmaceutical and food processing). GRW operates dedicated vertical sales teams — Salesteam Healthcare, Salesteam Aerospace and Salesteam Industry — supported by sales offices in Germany, the United States (Bloomfield, CT, at Kaman headquarters), the United Kingdom and Singapore, and a network of distributors across roughly 19 countries. Revenue is generated via quote-based B2B hardware sales of customized and standard components; pricing is not publicly disclosed. The company holds EN 9100:2018 aerospace certification and employs approximately 600 staff, with R&D supported by dual-study partnerships with FHWS Würzburg-Schweinfurt and FAU Erlangen-Nürnberg.
GRW's go-to-market is classic enterprise field sales combined with channel distribution, complemented by technical content marketing (multilingual website, whitepapers, trade-fair participation) and direct inquiry capture. In December 2023 GRW announced a reorganization of sales, R&D and business development; in 2024 the company achieved EN 9100:2018 certification and received the KAMAN Innovation Award from its parent, and it plans to launch the Q21 premium ball bearing line in 2026. Approximately 1,000 long-term customers and partners rely on GRW products globally.
GRW Bearing GmbH firmographics
Firmographics- Name
- GRW Bearing GmbH
- Legal name
- Gebr. Reinfurt GmbH & Co. KG
- Website
- https://grw.de
- Company type
- Private
- Founded year
- 1945
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- GRW Bearing GmbH is a German manufacturer of miniature and high-precision ball bearings, headquartered in Rimpar and operating as a subsidiary of Kaman Corporation. It serves healthcare, aerospace, and industrial customers with customized bearing solutions engineered for extreme temperatures, high speeds, and corrosive or vacuum environments.
- Ownership category
- akta.pro rank
GRW Bearing GmbH industry classification
Industry- Product category
- Precision Ball Bearings
- NAICS
- Ball and Roller Bearing Manufacturing (332991)
- SIC
- Ball & Roller Bearings (3562)
- akta.pro primary industry
- Aerospace Bearings, Bushings & Motion Components (IMABANAB)
Keywords
Where GRW Bearing GmbH is headquartered
LocationHeadquarters
- HQ city
- Rimpar
- HQ country
- Germany
- HQ region
- Europe
Offices5 records
Markets served
GRW Bearing GmbH business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Personnel, Supply Chain, Operations, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- Ball Bearing Products: Customized and standard ball bearings including miniature ball bearings, spindle ball bearings, radial deep groove ball bearings, duplex bearings, axial bearings, special ball bearings, and bearing units. Revenue generated from product sales to industrial, healthcare, and aerospace customers.
- Ball Bearing Accessories: Spacer shims, wave spring washers, and retaining rings that complement ball bearing installations
- Testing Technology: Specialized testing equipment such as dental test benches for measuring high-speed instrument rotation
Go-to-market motion2 records
Distribution channels4 records
Marketing channels5 records
GRW Bearing GmbH product offering
Product offeringCore offering
GRW designs, manufactures, and supplies customized and standard miniature and high-precision ball bearings—including radial deep groove, spindle, duplex, axial, special, and pre-assembled bearing units—together with ball bearing accessories and specialized testing technology such as dental test benches. Products are tailored for medical technology, aerospace/defense, and industrial applications, often operating under extreme temperatures, high speeds, vacuum, or corrosive conditions.
Product overview
GRW Bearing GmbH (Gebr. Reinfurt GmbH & Co. KG) is a manufacturer of miniature and high-precision ball bearings, offering both standardized and customized solutions. The product portfolio centers on ball bearings (including radial deep groove, spindle, duplex, axial, special, and pre-assembled units) complemented by testing technology equipment (such as dental test benches) and ball bearing accessories (shims, wave washers, retaining rings). The company serves three primary sectors: healthcare (medical instruments, dental applications), aerospace (civil aviation, space technology, defense), and industry (machine tools, e-motors, vacuum technology, robotics, automotive, pharmaceuticals, food processing, packaging). Products are designed to operate in extreme conditions including temperatures from -454°F to +842°F, high speeds up to 500,000 min⁻¹, and corrosive environments. GRW operates manufacturing in Germany (Rimpar) and assembly in Czech Republic (Prachatice), with sales offices in Germany, USA, UK, and Singapore.
Differentiator
Problem solved
Functional benefit
Products and services
- Ball Bearings Miniature and high-precision ball bearings in multiple configurations (radial deep groove, spindle, duplex, axial, special) for healthcare, aerospace, and industrial customers.
- Radial Deep Groove Ball Bearings Versatile single-row ball bearings in open, covered, and sealed forms for machine tools, measuring instruments, and spindles, with radial and axial load capacity.
- Spindle Ball Bearings Angular contact ball bearings with P4+ accuracy class and 15° or 25° contact angles, designed for high speeds and high load capacity in spindle applications.
- Duplex Bearings Paired ball bearings providing precise radial and axial positioning with enhanced load capacity, offered in O-arrangement, X-arrangement, and tandem configurations.
- Axial Ball Bearings Thrust ball bearings that withstand forces along the longitudinal axis, made from stainless or martensitic bearing steel for thrust load applications.
- Special Ball Bearings Custom-designed ball bearings for extreme temperatures, corrosive environments, and chemical contact, including super duplex, extra duplex, tandem duplex, integrated shaft designs, and custom geometries.
- Ball Bearing Units Pre-assembled bearing units combining one or more bearings with shaft/housing, spacing rings, and shims or wave spring washers, bonded under axial preload for zero-clearance installation.
- Ball Bearing Accessories Supporting components for bearing installation including stainless-steel spacer shims, wave spring washers, and cold-drawn spring-wire retaining rings for accurate positioning and retention.
- Testing Technology Specialized testing equipment including dental test benches for measuring rotation of high-speed instruments, enabling performance measurement under real conditions.
- Laboratory Services Analysis and testing services provided by GRW's laboratory for bearing performance evaluation and quality assurance.
- Q21 Ball Bearings Premium ball bearing product line with enhanced performance specifications, positioned as a new product release.
Quantifiable outcome
- Ball bearings capable of operating at temperatures from -270°C to +450°C
- +2 more outcomes
Companies that use GRW Bearing GmbH
Customer profileNamed customers7 records
Segments3 records
Ideal customer profiles3 records
GRW Bearing GmbH technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature7 records
GRW Bearing GmbH partnerships and signals
Strategic signalPartnerships
Eight partnerships are on record, tiered core and minor.
- KAMAN Specialty Bearings GmbH (UK)coreSales location in the United Kingdom under the Kaman Specialty Bearings umbrella, managed by Nick Dowding, Global Director Special Applications
- KAMAN Specialty Bearings Pte. Ltd. (Singapore)coreSales office in Singapore for the Asia Pacific region, managed by Nick Wheeler, Sales Manager Asia Pacific
- High Precision Bearings LP (USA)coreSales location in the United States at Kaman Corporation's headquarters in Bloomfield, Connecticut
- REINFURT-ČR, k.s. (Czech Republic)coreAssembly and manufacturing location in Prachatice, Czech Republic. 25 years of assembly activities at this site since spring 2021.
- Josef Blässinger GmbH + Co. KGcoreAwarded as GRW Dealer of the Year 2023. Major distributor in Germany/Austria region.
- FHWS Würzburg-SchweinfurtminorUniversity of Applied Sciences Würzburg-Schweinfurt - partner for dual study program in mechanical engineering
- Friedrich-Alexander-Universität Erlangen-NürnbergminorFAU Erlangen-Nürnberg - partner university for dual study program in mechanical engineering
- Wölfe Würzburg HandballminorLocal handball team sponsorship - GRW is Business-Partner sponsor. Supports player Dominik Schömig.
Scale indicators6 records
Recent moves6 records
Expansion highlights5 records
GRW Bearing GmbH competitors and assessment
Company assessmentDirect peers
- RBC Bearings Incorporated: US-based precision bearings specialist serving aerospace, defense, and industrial customers with engineered bearing solutions. Highly comparable to GRW in aerospace and specialty bearing focus.
- NTN Corporation: Japanese bearing manufacturer producing precision, aerospace, and specialty bearings. Direct competitor in machine tool, aerospace, and high-precision industrial bearing categories where GRW operates.
- Timken Company: US-based precision bearings, gears, and motion components manufacturer serving aerospace, defense, and industrial markets. Direct competitor in engineered bearings for aerospace and high-precision applications.
- Nachi-Fujikoshi Corp. Japanese bearings manufacturer producing precision ball bearings for machine tools, automotive, and industrial uses. Comparable in precision and specialty bearing categories.
- MinebeaMitsumi Inc. Japanese miniature and high-precision bearing specialist, perhaps the closest direct peer to GRW given its focus on miniature bearings for aerospace, medical, and industrial applications. Competes directly in miniature ball bearing categories.
- JTEKT Corporation (Koyo): Japanese bearing and steering manufacturer producing precision bearings including the Koyo brand. Comparable in machine tool spindle bearings and high-precision industrial applications.
- NSK Ltd. Japanese global bearing manufacturer with strong precision bearing offerings for machine tools, aerospace, and medical applications. Comparable product portfolio and target verticals to GRW, including high-precision spindle bearings.
Broad incumbents
- Schaeffler Group (INA/FAG): German bearing and motion technology specialist with INA/FAG brands producing precision bearings for aerospace, medical, and industrial customers. Directly comparable in precision and aerospace bearing categories, but operates at much larger scale.
- SKF Group: Swedish global bearings leader serving automotive, industrial, and aerospace with a broad portfolio including precision and specialty bearings. Comparable to GRW in precision bearing categories but vastly larger and more diversified.
Emerging players
- C&U Bearing: Chinese bearing manufacturer producing precision and miniature bearings at competitive pricing for industrial and emerging applications. An emerging competitor in commodity-adjacent precision categories.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks1 record
Key highlights7 records
Customer concentration
GRW Bearing GmbH social profiles
Digital presenceGRW Bearing GmbH compliance and trust
Trust signalCompliance1 record
GRW Bearing GmbH financial estimates
Financial estimateRevenue estimate
Valuation estimate
GRW Bearing GmbH leadership team
Management profileNumber of profiles
Profiles7 records
GRW Bearing GmbH subsidiaries and ownership
Company hierarchySubsidiaries1 record
GRW Bearing GmbH funding detail
Funding detailFunding overview
Funding rounds1 record
Investors1 record
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
GRW Bearing GmbH 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 GRW Bearing GmbH
What does GRW Bearing GmbH do?
GRW designs, manufactures, and supplies customized and standard miniature and high-precision ball bearings—including radial deep groove, spindle, duplex, axial, special, and pre-assembled bearing units—together with ball bearing accessories and specialized testing technology such as dental test benches. Products are tailored for medical technology, aerospace/defense, and industrial applications, often operating under extreme temperatures, high speeds, vacuum, or corrosive conditions.
Is GRW Bearing GmbH a public or private company?
GRW Bearing GmbH is a private company. It is classified as corporate owned and is currently operating.
When was GRW Bearing GmbH founded?
GRW Bearing GmbH was founded in 1945. It employs 1 to 10 people.
Where is GRW Bearing GmbH based?
GRW Bearing GmbH is headquartered in Rimpar, Germany, in the Europe region.
How does GRW Bearing GmbH make money?
Three revenue lines are on record. Ball Bearing Products are the primary driver. The others are ball Bearing Accessories and testing Technology.
Who are GRW Bearing GmbH's main competitors?
Direct peers on record are RBC Bearings Incorporated, NTN Corporation, Timken Company, Nachi-Fujikoshi Corp., MinebeaMitsumi Inc., JTEKT Corporation (Koyo) and NSK Ltd.. Broad incumbents are Schaeffler Group (INA/FAG) and SKF Group. C&U Bearing is listed as an emerging player.
Does GRW Bearing GmbH have an API?
No public API is recorded for GRW Bearing GmbH.
What industry is GRW Bearing GmbH in?
GRW Bearing GmbH's product category is Precision Ball Bearings. Its primary akta.pro industry code is IMABANAB, Aerospace Bearings, Bushings & Motion Components. Its NAICS code is 332991 and its SIC code is 3562.