古賀歯車製作所 List of Products and Services

Our company manufactures and sells "case-hardened gear helical racks" that keep cumulative pitch error below 10μm, enabling high-precision positioning. With high rigidity and low vibration, they can transmit rotation smoothly and at high speeds, making them suitable for drive shafts of machine tools and travel axes of robotic transporters. They can be extended without limit on stroke, and in applications requiring long strokes, using them as a substitute for ball screws can lead to cost reductions. 【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 requested 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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• rack

"Straight Gears and Helical Gears" are basic product groups created by Koga Gear Manufacturing. They are active in a wide range of fields, from large-scale plants to ship deck cranes, rocket transport rails, dam gate opening and closing racks, and machine tools and robot transport-related applications. When considering design and manufacturing, please consult our company, which has many years of experience and technology. [Features] ■ Supports 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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• Contract manufacturing

Our "Straight Bevel" is processed using the Gleason Company’s gear cutting machine (No. 24), allowing for good tooth engagement and the possibility of crowning. 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, 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-style 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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• Contract manufacturing

We respond to diverse needs that meet various sizes and processing conditions with our technical expertise and responsiveness, starting with carburized helical racks. We can address various concerns and questions, such as, "Can you manufacture the same item if I send you a broken gear?" or "Is it possible to get a quote and produce gears in small quantities (starting from one piece)?" and "What types of heat treatment can you perform?" 【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 support for all lot sizes, from prototypes to mass production, ranging from one to about 1,000 pieces For shapes not listed in the standard catalog or for custom orders of special items, please leave it to us! Additionally, feel free to contact us for any information not introduced here. *For more details, please refer to the PDF materials 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 produce. Please feel free to share any requests, even those that may have been declined by other companies. 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 for a speedy response with an integrated 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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The "Carburized Tooth Ground Helical Rack" offers outstanding performance with a cumulative pitch error of less than 10μm, 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.

• gear
• Contract manufacturing

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

• gear

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 machine tools and peripheral equipment. Feel free to entrust us with custom orders for shapes not found 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 long lifespan of machinery ■ Can be manufactured to requested lengths and 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.

• gear

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 Works and are used in robots and conveying equipment. Feel free to entrust us with custom orders for shapes not found 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 long lifespan of machinery ■ Can be manufactured to the desired length, available for purchase from just one piece 【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 materials or feel free to contact us.

• gear

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 Works, used in automated warehouses and logistics equipment. Feel free to entrust us with custom shapes not found in the standard catalog or special order manufacturing! 【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.

• gear

Our "Straight Bevel" products feature excellent tooth engagement due to Gleason-type tooth cutting, and they can also be crowning processed. 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 found in the standard catalog! 【Features of Bevels】 ■ Gleason-type 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.

• gear

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 provides good tooth contact and allows for crowning processing. By applying crowning, we can guide the tooth contact position at no load to an ideal location. When a load is applied, the tooth contact is achieved near the center of the tooth width, which prevents cross contact and reduces noise. Feel free to entrust us with shapes not listed in the standard catalog or custom orders! 【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 and up to φ2000 ■ Crowning compatible ■ One-stop service from material procurement to completion 【Features of Bevels】 ■ Gleason-type tooth profile ■ Crowning compatible ■ Tooth contact inspection available *For more details, please refer to the PDF document or feel free to contact us.

• gear

Our company's trademark, 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 found in our standard catalog! **Features of Racks** - High-density cutting - Ultra-hard 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 *For more details, please refer to the PDF materials or feel free to contact us.*

• gear