古賀歯車製作所 List of Products and Services

Replacing existing products will significantly improve accuracy, lifespan, and noise reduction effects.

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Our company manufactures and sells "Carburized Gear Ground Helical Racks" that keep cumulative pitch error below 10μm, enabling high-precision positioning. These racks achieve high rigidity and low vibration, allowing for smooth and high-speed transmission of rotation, making them suitable for drive axes of machine tools and travel axes of robotic transport systems. They can be extended without limitation on stroke, and in applications requiring long strokes, they can be used as a cost-effective alternative to ball screws. 【Features】 ■ Adopts a global standard twist angle of 19° / 31' / 42" ■ Entire length can be aligned to an integer ■ Resistant to wear and impact, contributing to the longevity of machinery ■ Can be manufactured to desired lengths and available for purchase from a single unit *For more details, please refer to the materials. Feel free to contact us with any inquiries.

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"Straight gears and helical gears" are basic products created by Koga Gear Manufacturing. They are utilized in a wide range of fields, from large-scale plants to ship deck cranes, rocket transport rails, dam gate opening and closing racks, as well as in machine tools and robotics transport. When considering design and manufacturing, please consult our company, which has many years of experience and technology. [Features] - Supports module 22 and up to φ2000 - Crowning support - One-stop service from material procurement to completion *For more details, please refer to the PDF materials or feel free to contact us.

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Our "Straight Bevel" products, processed using the Gleason Company’s gear cutting machine (No. 24), offer excellent tooth engagement and can also undergo crowning processing. By applying crowning, it is possible to guide the tooth engagement position during no-load conditions to an ideal location. When a load is applied, the tooth engagement can be achieved near the center of the tooth width, resulting in reduced noise. Our bevels, which can be processed up to M25, are well-suited for powerful machinery. If you are interested, please feel free to consult us. 【Features】 ■ Gleason-type tooth profile ■ Crowning compatible ■ Tooth engagement inspection compatible *For more details, please refer to the PDF document or feel free to contact us.

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We respond to diverse needs with our technical expertise and adaptability, starting with carburized helical racks, meeting various sizes and processing conditions. From requests like, "Can you manufacture the same item if I send you a broken gear?" to inquiries such as, "Can you provide estimates and production for small quantities (from 1 piece)?" and "What types of heat treatment can you perform?", we address a wide range of concerns and questions. 【Features of KOGA Racks】 ■ Compatible with modules from M0.5 to over M30 ■ Processing support for both helical and straight types ■ Achieves "shapes" and "sizes" not available in the catalog lineup, with "lengths" customizable as needed ■ Supports all common heat treatments, including tempering, carburizing, high-frequency hardening, laser hardening, nitriding, and non-oxidizing hardening ■ Flexible response to all lot sizes, from prototypes to mass production, accommodating from 1 to about 1000 pieces For shapes not listed in the standard catalog or custom orders, please leave it to us! Also, feel free to contact us for any information not mentioned here. *For more details, please refer to the PDF document or feel free to contact us.

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Introducing the process from request to delivery! As a "specialized manufacturer of gears," our company has been engaged in the design and production of various gears for over 90 years. We strive daily for technological innovation and the improvement of development and manufacturing techniques to meet our customers' needs. After your request, we will discuss whether there are specific specifications, such as drawings of the gear products you wish to manufacture. Please feel free to share any requests, even those that other companies may have declined. We will do our best to propose products that meet your requirements. Additionally, if you have any desired costs or delivery times, please do not hesitate to consult with us. We aim to provide speedy responses with a consistent in-house system from request to delivery. *For more details, please refer to the PDF materials or feel free to contact us.*

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Our company's signature products include "racks" and the basic product line of "straight gears and helical gears." We meet the needs of various fields, from extremely small sizes to extremely large sizes, and from precision to heavy-duty applications. Additionally, "straight bevels" feature Gleason-type tooth cutting, which ensures good tooth engagement and allows for crowning processing. By applying crowning, we can guide the tooth engagement position at no load to an ideal location. When a load is applied, the tooth engagement is achieved near the center of the tooth width, which prevents cross engagement and reduces noise. Feel free to entrust us with custom shapes not listed in the standard catalog and special order production! **Features of Racks** - High-density cutting - Carbide tooth cutting available - Short delivery times - Custom sizes available to meet your requirements **Features of Gears** - Supports module 22, up to φ2000 - Crowning support - One-stop service from material procurement to completion **Features of Bevels** - Gleason-type tooth profile - Crowning support - Tooth engagement inspection support *For more details, please refer to the PDF materials or feel free to contact us.*

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Our company's signature product, the "Rack." We meet the needs of various fields, from ultra-small sizes to ultra-large sizes, and from precision to heavy-duty. Additionally, "Straight Gears and Helical Gears" are basic products manufactured by Koga Gear Works, used in construction elevators, slope cars, and one-person monorails for nursing care. Feel free to entrust us with custom orders for shapes not listed in the standard catalog! **Features of Racks** ■ High-density cutting ■ Ultra-hard tooth cutting is also possible ■ Short delivery times ■ Custom sizes available to meet your requirements **Features of Gears** ■ Compatible with module 22, up to φ2000 ■ Crowning support ■ One-stop service from material procurement to completion *For more details, please refer to the PDF materials or feel free to contact us.*

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Our "Straight Bevel" products, handled by our company, feature excellent tooth engagement due to the Gleason cutting method, and they can also be subjected to crowning processing. By applying crowning, it is possible to guide the tooth engagement position during no-load conditions to an ideal location. When a load is applied, the tooth engagement can be achieved near the center of the tooth width, which prevents cross engagement and reduces noise. Our bevels, which can be processed up to M24, are well-suited for powerful machinery. Additionally, "Straight Gears and Helical Gears" are basic products manufactured by Koga Gear Works and are used in automated warehouses and logistics equipment. Feel free to entrust us with custom orders for shapes not listed in the standard catalog! 【Features of Bevels】 ■ Gleason tooth profile ■ Crowning compatible ■ Tooth engagement inspection compatible 【Features of Gears】 ■ Compatible with module 22 and up to φ2000 ■ Crowning compatible ■ One-stop service from material procurement to completion *For more details, please refer to the PDF document or feel free to contact us.

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Our company manufactures and sells "case-hardened ground helical racks" that keep cumulative pitch error below 10μm, enabling high-precision positioning. Additionally, "straight gears and helical gears" are a basic product line created by Koga Gear Manufacturing and are used in automated warehouses and logistics equipment. Feel free to entrust us with custom orders for shapes not found in our standard catalog! 【Features of Case-Hardened Ground Helical Racks】 ■ Adopts a global standard twist angle of 19°/31'/42" ■ Can align the total length to an integer ■ Resistant to wear and impact, contributing to the longevity of machinery ■ Can be manufactured to requested lengths, available for purchase from a single unit 【Features of Gears】 ■ Supports module 22, up to φ2000 ■ Crowning compatible ■ One-stop service from material procurement to completion *For more details, please refer to the PDF document or feel free to contact us.

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Our company manufactures and sells "case-hardened ground helical racks" that keep cumulative pitch error below 10μm, enabling high-precision positioning. Additionally, "straight gears and helical gears" are basic products created by Koga Gear Manufacturing and are used in robots and conveying equipment. Feel free to entrust us with custom orders for shapes not listed in the standard catalog! 【Features of Case-Hardened Ground Helical Racks】 ■ Adopts a global standard twist angle of 19°/31'/42" ■ Can align the total length to an integer ■ Resistant to wear and impact, contributing to the longevity of machinery ■ Can be manufactured to the desired length and available for purchase from a single unit 【Features of Gears】 ■ Supports module 22, up to φ2000 ■ Crowning support ■ One-stop service from material procurement to completion *For more details, please refer to the PDF document or feel free to contact us.

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Our company manufactures and sells "Carburized Gear-Honed Helical Racks" that keep cumulative pitch error below 10μm, enabling high-precision positioning. Additionally, "Straight Gears and Helical Gears" are basic products created by Koga Gear Manufacturing, used in machine tools and peripheral equipment. Feel free to entrust us with custom orders for shapes not found in the standard catalog! 【Features of Carburized Gear-Honed Helical Racks】 ■ Adopts a global standard twist angle of 19°/31'/42" ■ Can align the total length to an integer ■ Resistant to wear and impact, contributing to the longevity of machinery ■ Can be manufactured to requested lengths, available for purchase from a single unit 【Features of Gears】 ■ Supports module 22, up to φ2000 ■ Crowning compatible ■ One-stop service from material procurement to completion *For more details, please refer to the PDF materials or feel free to contact us.

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The "Carburized Tooth Ground Helical Rack" offers outstanding performance with a cumulative pitch error of 10μm or less, meeting high-precision positioning requirements. Compared to conventional normal straight racks, this product has 18 times the tooth surface strength and 2.6 times the bending strength. Additionally, it reduces vibrations by 60%. It can be utilized in machine tools and robotic transport, among other applications. 【Features】 ■ Improved positioning accuracy ■ Reduced noise and vibration ■ Unlimited stroke ■ Integer control of stroke ■ Downsizing of machines *For more details, please refer to the PDF document or feel free to contact us.

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