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  6. GEHRING / Non-Cylindrical Honing

GEHRING / Non-Cylindrical Honing

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Non-cylindrical honing

last updated:May 19, 2026

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Reducing friction loss in internal combustion engines through non-cylindrical honing processing.

Gäuling's Non-Cylindrical Honing (FormHoning) Gäuling has developed a honing method that takes into account the distortion during engine operation, rather than manufacturing cylindrical bores. The distortion of the bore shape is countered by creating an inverted shape through the FormHoning method, maintaining a cylindrical shape even during operation. [Features] ■ FormHoning Light simulates the thermal distortion inside the bore during engine combustion and is a technology that intentionally hones the bore shape into various non-cylindrical shapes. ■ By processing the bore into a non-cylindrical shape with FormHoning Light, the contact between the piston skirt and the bore during combustion is reduced, thereby decreasing friction. ■ FormHoning Professional utilizes a special honing tool equipped with an expansion mechanism using piezo elements to optimize local piston clearance and reduce bore deformation caused by static and thermal distortion. This achieves a cylindrical bore without distortion even during engine combustion, reduces ring tension, and decreases friction resistance between the piston skirt and cylinder bore, as well as CO2 emissions.

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141203_igs_gehring_0035.jpg

GEHRING / Non-Cylindrical Honing

141203_igs_gehring_0035.jpg
141203_igs_gehring_0035.jpg Formhoning_light形状-1024x524.png Formhoning_lightボア形状-686x1024.png Formhoning_professional形状-1024x808.png
  • Related Link - https://www.ckb.co.jp/product/1123/
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For more details, please refer to the PDF document or feel free to contact us. About Gehring Gehring was established in 1926 in Naumburg, Saxony-Anhalt, where it laid the foundation for its factory. In 1935, it produced its first honing machine. The company has since relocated its factory to Stuttgart in Baden-Württemberg and is continuously engaged in the development of new technologies. Additionally, it develops and produces honing tools and grinding wheels, leading the world as the only comprehensive honing manufacturer.

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GEHRING / Non-Cylindrical Honing (Form Honing)

GEHRING / Non-Cylindrical Honing (Form Honing)

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GEHRING / Manufacturing equipment for hairpin-type stators (EV = electric vehicle)

GEHRING / Manufacturing equipment for hairpin-type stators (EV = electric vehicle)

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We will be exhibiting at JIMTOF2026.

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Dear Sir/Madam, I would like to express my congratulations on the continued prosperity of your esteemed company. I sincerely appreciate your exceptional support. We will be exhibiting at JIMTOF2026. Focusing on the aerospace and power generation sectors, we will showcase the latest technologies, including high-precision processing of difficult-to-machine materials for aircraft engine components and power generation equipment, as well as production efficiency technologies for EVs and next-generation mobility. We kindly invite you to visit our exhibition booth and view our displays.

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We will be exhibiting at the 18th Automotive World - Advanced Automotive Technology Exhibition.

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Dear Sir/Madam, I would like to express my congratulations on the continued prosperity of your company. I sincerely appreciate your exceptional support as always. We will be exhibiting at the Automotive World 2026. - Gehring's "Hairpin Stator Manufacturing Line" from Germany We will introduce a series of manufacturing technologies used in the production line for EV stator components. We will display samples of the finished hairpin stators, and in a collaborative video with WAFIOS, you will be able to see a series of manufacturing processes including pin production, assembly, pin expansion and bending, welding, impregnation, and powder coating. Additionally, we will also showcase samples of honing tools and laser roughening at the same booth. Gehring and WAFIOS have been in a cooperative relationship since April 2021, aiming to provide a turnkey solution for hairpin stator manufacturing lines. This exhibition will be presented as a joint exhibit by our company, the agent for Gehring, and CORRENS, the agent for WAFIOS.

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Our company was founded in 1953. Since its establishment, we have primarily imported and sold machine tools, measuring instruments, and forging machinery from Western countries, contributing to the modernization and industrialization of Japan's industry. Our history is closely tied to Japan's manufacturing. Thanks to the efforts of our predecessors, we have overcome numerous challenges through hard work and perseverance, supporting Japan's industrial sector. This is our pride, and it continues to be passed down in our daily business activities. We have specialists with expert knowledge who propose the most suitable products to our customers, supporting them from planning and design of manufacturing to information on the latest equipment. We sincerely ask for your continued support and patronage in the future.

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