circular arc gear pump is a new structure of external meshing circular arc gear pump, circular arc gear pump gear using advanced arc and other curves combined into the tooth shape, so the pump has excellent working characteristics. Compared with the traditional involute gear pump, the pump has the advantages of small pressure fluctuation, low noise, high efficiency and long life. It is a new series of energy-saving pumps.

Scope of application:
is suitable for conveying lubricating oil without solid particles and fibers, non-corrosive, temperature not higher than 80 ℃, viscosity 5-1500cst or other liquids similar to lubricating oil.

Purpose:
can be used as a transmission and booster pump in the oil delivery system.
can be used as a fuel pump for delivery, pressurization and injection in the oil delivery system.
in all industrial fields, can be used as lubricating oil pump.

structural features:
adopts a new technology with advanced international level in the 1980 s-double arc sine curve tooth type. Compared with involute gears, its outstanding advantage is that the tooth profile surface does not slide relatively during the gear meshing process, so the tooth surface has no wear, balanced operation, no liquid trapping, low noise, long life and high efficiency. The pump gets rid of the shackles of traditional design, making the gear pump enter a new field in design, production and use. There is a differential pressure safety valve as overload protection. The total return pressure of the safety valve is 1.5 times of the rated discharge pressure of the pump, and it can also be adjusted according to actual needs within the allowable discharge pressure range. However, this safety valve can not be used for long-term work, if necessary, can be installed in the pipeline. The pump shaft end seal is designed in two forms, one is a mechanical seal and the other is a packing seal. Users can choose according to their requirements.

The current search results for the international comparison of European and American brands of "Wire Race Bearing" only provide a "list of market participants" and cannot support the "structural characteristics and brand comparison" you requested - there is no source that discloses the specific technical routes, product structure differences, or detailed performance parameters of each brand.

The following content strictly follows the verifiable information of search results, accurately defines the real market pattern and "information vacuum" status of European and American brands, and provides the only feasible engineering procurement path.

1、 Core fact: Who is the 'European and American brand'? (Multi source cross validation)
Strictly identify all brands appearing in the search results based on geographical affiliation and technical positioning, and the conclusion is as follows:

Can the headquarters/affiliated brand nature be confirmed as a "leading European and American bearing giant" in terms of the number of times the brand source is mentioned
Kaydon Bearings is a globally renowned manufacturer of slewing bearings, thin-walled bearings, and steel wire raceway bearings in the United States ✅  yes
Franke GmbH is the inventor of three German steel wire raceway bearings and a global technological benchmark ✅  Yes (the pioneer of the industry)
Thyssenkrupp (Rothe Erde) is a global rotary bearing giant in Germany, with its Rothe Erde brand covering steel wire raceway bearings ✅  yes
Schaeffler Group (INA/FAG) is one of the top global bearing suppliers in Germany, with a product line that includes precision steel wire raceway bearings ✅  yes
SKF, a global bearing leader in Sweden, will release specialized bearing steel for steel wire raceways in November 2025 ✅  yes
Timken is a global tapered roller bearing giant in the United States, with a product line covering precision bearings ✅  yes
KMF 3rd German manufacturer of plastic metal composite components and special bearings ⚠️  Yes (niche professional factory)
Iraundi 3 times Spanish special bearing manufacturer ⚠️  Yes (regional brand)
Tibet Makina 3 times Türkiye industrial machinery parts manufacturer ⚠️  Yes (Not First Line)
IKO Nippon Thompson is a Japanese brand ❌  non-European and non-American
JTEKT (Koyo) once a Japanese brand ❌  non-European and non-American
NSK 1st Japanese brand ❌  non-European and non-American
NTN 1 Japanese brand ❌  non-European and non-American
Nachi Fujikoshi 1 time Japanese brand ❌  non-European and non-American
Cixi JVB once a Chinese domestic brand ❌  non-European and non-American
FHD Bearings is a Chinese domestic brand once ❌  non-European and non-American
ZYS Bearing is a Chinese domestic brand once ❌  non-European and non-American
Key conclusion:

Top tier companies in Europe and America: Kaydon (USA), Franke (Germany), Thyssenkrupp (Germany), Schaeffler (Germany), SKF (Sweden), Timken (USA) - these are absolute giants in the global bearing industry and must have a steel wire raceway bearing product line.

European and American professional/niche teams: KMF (Germany), Iraundi (West), Tibet Makina (Turkey) - appear in some market reports, but not as a global first-line bearing supplier.

Excluding Japanese/domestic brands: IKO, JTEKT, NSK, NTN, Nachi, Cixi JVB, FHD, ZYS - do not belong to the category of European and American brands and will not be included in this comparison.

2、 Deadly gap: lack of technical information on "structural feature comparison"
This is the fundamental dilemma facing the current answer - search results only provide a "brand list" without any technical details for comparison.

Is there a specific situation in the search results for the required information
Structural characteristics of Kaydon steel wire raceway bearings ❌  No mention of name only, no product description
Structural features/technical advantages of Franke GmbH ❌  No mention of the launch of "ultra lightweight military/aerospace bearings" in March 2025, but no specific structural parameters are available
The structural characteristics of Thyssenkrupp Rothe Erde ❌  No mention of name only, no product details
SKF steel wire raceway bearing technology ❌  No mention of the release of "new bearing steel" in November 2025, but no structural design information available
Product details of Schaeffler/Timken ❌  Not only included in the list of competitors, zero details
Comparison of cross-sectional heights of various brands of steel wire raceway bearings ❌  None -
Differences in geometric design of rolling tracks among different brands ❌  None -
Comparison of retaining frames/sealing structures among various brands ❌  None -
Comparison of Extreme Speed/Load Capacity among Various Brands ❌  None -
Comparison of precision grades/ISO tolerances among different brands ❌  None -
The only 'technology related information' that appears is extremely vague:

Franke GmbH (March 2025): launches "ultra lightweight" steel wire raceway bearings for defense and aerospace, "high load capacity+weight reduction", suitable for radar and turret systems.

SKF (November 2025): Released the "North Star 15" new bearing steel, suitable for the next generation of aircraft engines, and can be used in extreme environments such as steel wire raceways and precision bearings.

NBG Innovations (February 2025): Launched 300rpm/400rpm steel wire raceway bearings for medical CT machines, featuring high load, low noise, and compact design.

Please note that the above information is from "non first tier brands" (NBG) or only related to materials/applications, and does not constitute a structural comparison of mainstream European and American brands such as Kaydon, Franke, ThyssenKrupp, SKF, Schaeffler, Timken, etc.

3、 Why can't we find a comparison of steel wire raceway bearing structures between European and American brands through public channels?
This is not a search capability issue, but an essential problem in the industry.

1. Steel wire raceway bearings are highly engineered customized products, rather than standard components

Unlike deep groove ball bearings (such as 6204) which have publicly available ISO size series, the design of steel wire raceway bearings is entirely dependent on the specific application (robot joints, medical CT mounts, radar antennas, semiconductor equipment).

The cross-sectional height, raceway curvature, wire diameter, contact angle, and cage design of each brand are core proprietary technologies, and detailed comparative data are rarely disclosed in public promotional materials.

2. The technical information of market leaders (Franke, Kaydon) is protected trade secrets

Franke GmbH is the inventor of steel wire raceway bearings, and its official website must have detailed product technical manuals, but this search result did not capture any first-hand technical information from Franke.

Kaydon Bearings has a complete Reali Slim ® The engineering catalog for thin-walled bearings and steel wire raceway bearings product lines contains hundreds of pages of design data, but it also did not appear in this search result.

3. Limitations of search result sources

All the reports returned this time are summaries of third-party market research reports (LP Information, Bosson Research, Stalwart Insights, Bezos Consulting).

There are no original technical samples, engineering manuals, or official technical white papers of the brand.

This type of report is effective for understanding market size, competitive landscape, and growth trends, but it is ineffective for comparing product technology structure.