協育歯車工業 List of Products and Services

This catalog introduces various gears handled by our company. It includes "spur gears, helical gears, and no-backlash gears" suitable for parallel axis rotation transmission, as well as "miter gears and bevel gears" suitable for rotation transmission with axes intersecting at 90 degrees. Our commitment since our founding has been to ensure that each of the approximately 3,000 items can be obtained with stable quality "anytime, anywhere, and immediately." Please make use of this for your product selection. [Contents (excerpt)] ■ Gearboxes ■ No-backlash gears ■ Spur gears ■ Racks ■ Helical gears *For more details, please refer to the PDF document or feel free to contact us.

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This catalog is the comprehensive catalog of Kyouiku Gear Industry Co., Ltd. It features a wide range of products, including "gearboxes," "no-backlash gears," "spur gears," and "internal gears." Our company leverages its production know-how in precision small custom gears to provide made-to-order gears starting from just one piece to meet our customers' needs. Please feel free to contact us when you need assistance. 【Featured Products (Partial)】 ■ Gear Systems (Gearboxes) ■ No-Backlash Gears ■ Ground Spur Gears ■ Spur Gears ■ Internal Gears *For more details, please refer to the PDF materials or feel free to contact us.

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The "Blue POM Gear Series" for food contact is an ideal gear for food and packaging equipment that complies with food contact applications and regulations in the U.S. and EU markets. It uses the color "blue," which is not found in food materials, effectively preventing foreign matter contamination in products. The materials in this series comply with or are self-declared by manufacturers according to Japan's food contact regulations, including the Polyethylene Association PL and the Ministry of Health, Labour and Welfare Notification No. 370. Additionally, we offer secondary processing of standard gears, the "KG Gear Education Kit" suitable for educational settings, and custom gears available from just one piece. 【Features】 ○ Complies with regulations in the U.S. and EU markets ○ Ideal for food and packaging equipment ○ Uses blue color not found in food materials ○ Effective against foreign matter contamination For more details, please contact us or download the catalog.

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We accept the production of small precision gears. They are ideal for robots, medical devices, and precision instruments. They can be used in spaces with limited room.

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The "Gear Drawing Download Service" allows you to easily download product drawings and also create additional processing drawings with ease. You can download in the format of your CAD software. For some products, it is easy to modify the shape you want, and CAD data can also be downloaded. 【Features】 ■ Easily search for the gears you want ■ Recommended products are displayed simultaneously ■ Additional processing drawings can be created easily ■ CAD data can be downloaded *For more details, please refer to the PDF document or feel free to contact us.

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Our "KG Gearbox" is compact and simple. The gears are fully packed, making it effective for dust prevention. It also features screw hole processing, allowing for very smooth installation. Additionally, we have a wealth of experience in producing custom gearboxes! We can provide from just one unit. ★ We are currently offering a comprehensive catalog! ★ It includes information beyond products, such as "customization examples" and "cases of successful cost reductions for custom products." It can also serve as a design inspiration. 【Products featured in the catalog】 ■ Bevel Gearbox ■ Hollow Shaft Bevel Gearbox ■ High-Precision Spiral Bevel Gearbox ■ Bevel Gear Set ■ Hypoid Gearbox ■ Worm Gearbox * For more details, please refer to the catalog. Feel free to contact us with any inquiries.

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The "No Backlash Gear Series" is a product that can eliminate backlash between gear teeth by pinching the teeth of the opposing gear with the force of a spring using two gears. It is ideal for rotational and angular transmission in precision instruments, measuring devices, and robotics. Additionally, we also offer the "Control Backlash Gear Series," which allows for minimal adjustment and fixation of backlash. 【Features】 ■ Increased resolution of encoders ■ High-precision positioning ■ High-precision indexing ■ Measures to reduce gear noise in rotating transmission parts with vibrations *For more details, please refer to the catalog or feel free to contact us.

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"Worm gears" with a module of 0.5 to 2.0 are manufactured through cold rolling. The surface roughness is finished to be below 0.8a (3.2S), making it a gentle worm for mating wheels, especially those made of resin. The surface of the screw face is hardened through work hardening, and since the metal fiber structure is not cut, its mechanical properties are superior compared to those produced by cutting. 【Features】 ○ Worms with a module of 0.5 to 2.0 are made through cold rolling. ○ The surface hardness after rolling is 1.2 to 1.3 times that of the base material, resulting in a screw face hardness of HB240 to 260. ○ Rolled worms have a mirror-like surface roughness on the screw face, so when used in combination with worm wheels, the lifespan of the worm gear is longer compared to combinations with cut worms. For more details, please contact us or download the catalog.

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This is a precision rack for gear grinding that perfectly matches the requirements for precise movements in fields such as mechatronics, machine tools, and measuring instruments. In recent years, the demand for anti-backlash mechanisms has been increasing. By using a gear grinding rack, it is possible to bring backlash close to "0". 【Features】 ○ Material straightness: Final processing accuracy within 0.04 mm ○ Material parallelism: Within 0.01 mm through four-sided grinding finish ○ Cumulative pitch error: Within 0.025 mm (200l) For more details, please contact us or download the catalog.

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The gear "rack" includes a wide range of products tailored to various applications, starting with the module size "rack," as well as circular pitch "CP rack" and circular pitch "CP rack pinion." 【Features】 ○ RoHS compliant ○ Round racks with handles are also available For more details, please contact us or download the catalog.

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This is a gear that bends at a right angle to accurately transmit rotation. There are straight teeth and curved teeth (spiral), and the S45C products also include high-frequency hardened tooth parts. The speed ratios are 1:1, 1:2, and 1:3. 【Features】 ○ MGH series, a finished product that can be used without additional processing of the hole diameter ○ High-frequency hardened teeth, keyway, and tapped products For more details, please contact us or download the catalog.

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A lineup of compact and wide-range small module size and high-quality medium module size spur gears is available. We offer a wide variety of 11 sizes ranging from module m0.5 to m5.0. You can choose from materials such as acetal, SUS304, brass, and S45C. 【Features】 ○ RoHS compliant For more details, please contact us or download the catalog.

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The technical documentation for gears includes various information such as "approximate conversion values for Rockwell C hardness of steel," "dimensional tolerances for commonly used fitting holes," and "pitch and reference drill dimensions for metric coarse and fine screws." [Included Documents] - Hardness conversion table - Dimensional tolerances for commonly used fitting holes - Dimensional tolerances for commonly used fitting shafts - Pitch and reference drill dimensions for metric coarse and fine screws - Dimensions for counterbores and bolt holes for hex socket bolts For more details, please contact us or download the catalog.

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We offer a variety of sprockets in different materials, shapes, and sizes according to their applications, including "sprockets for ladder chains with a pitch of 3.75," "sprockets for ladder chains with a pitch of 4.8," and "wheels for bush chains with a pitch of 6.35 with a single hub." 【Features】 ○ RoHS compliant For more details, please contact us or download the catalog.

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This product is a helical gear that can be used as parallel shaft (spur gear) or right-angle shaft (worm gear). The materials available are acetal, SUS304, and S45C (high-frequency hardened teeth). Sizes range from m1 to m4. 【Features】 ○ Usable as parallel shaft (spur gear) or right-angle shaft (worm gear) For more details, please contact us or download the catalog.

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The modules are available in three types: m0.5, m0.8, and m1, with a focus on small modules to enhance the standards. The fit tolerance for the outer ring is set to h8, and it is processed to fit directly into holes such as those in the housing. Please choose the corresponding pinion from the KG spur gears. 【Features】 ○ RoHS compliant For more details, please contact us or download the catalog.

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In the fields of mechatronics, such as semiconductor manufacturing equipment, as well as precision instruments and machine tools that require precise movements, we offer "user-friendly precision gears." We have a wide range of sizes available, from module m0.5 to m3.0, in seven sizes. The materials used are SCM435 and SCM440, and we perform high-frequency hardening on the tooth parts (HRC 49 to 55). Additional processing for holes and hub parts is possible. 【Features】 ○ Accuracy grade is JIS B 1702 Class 1 (equivalent to JIS B 1702-1 (ISO) Class 5) ○ Grinding finish is applied to holes, outer circumference, sides, and hub sides → This serves as a reference surface during additional processing ○ Both shaft types (pinion) are also available For more details, please contact us or download the catalog.

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KG Gear's "No Backlash Gear" is essential in fields that require "zero play." We offer both tooth surface cutting finish and grinding finish. The no-backlash mechanism can eliminate backlash using the force of springs or control backlash through bolt fixation. We respond to the demand for achieving "zero" backlash with the development of the mechatronics industry. 【Features】 ○ NSU, NS, NSG Series → A method to eliminate backlash using the force of springs → Utilizes the force of springs to clamp the opposing teeth ○ ASG Series → Bolt-fixed control backlash gear → Capable of transmitting high precision and high loads For more details, please contact us or download the catalog.

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The "GEAR SYSTEMS" is equipped with high-precision KG gears, with backlash set to be below 15 to 20' for BS type, below 10 to 15' for BSH type, below 20' for HYBOX, and below 25' for W-BOX during assembly. It has been processed with screw holes for easy installation. Lubrication is done with grease. 【Features】 ○ Adopts a compact and simple design ○ Gears are completely packed for dust prevention For more details, please contact us or download the catalog.

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KG STOCK GEARS offers a variety of gears with different numbers of teeth, tooth widths, and hole diameters to meet a wide range of needs. Additionally, we provide gear machining (secondary processing) to further accommodate our customers' specific requirements. Please place your orders based on your drawings. 【Features】 ○ Machining of standard gears ○ Available from a single piece For more details, please contact us or download the catalog.

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At Kyoyuki Gear Industry Co., Ltd., we utilize our expertise in the production of precision small standard gears to also accept custom orders (made-to-order gears) beyond standard products. We can accommodate spur gears and bevel gears with a module of 0.3. We have also established a thorough inspection system. For the inspection of small module and small gears, we use Nikon's high-precision non-contact sensor 3D system "HN-C3030P." 【Features】 - Short delivery times, low costs - Custom gears available from a single piece - Accommodates small module and small gears, including spur gears and bevel gears - Well-established inspection system For more details, please contact us or download the catalog.

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The precision gear rack "RKG Series" features high-frequency hardening on the teeth and is a high-precision gear rack with a fully polished finish. The corresponding gears include the economy type gear "SGE Series," which only has tooth surface grinding, as well as the "S-H Series," which has high-frequency hardening on the teeth to reduce the burden of the customer's heat treatment process, and the "BF Series," which is ideal for additional processing with a smaller hole diameter and larger hub to expand the range of additional machining. You can choose from a wide variety of options. 【New Series】 ○ Module: m1.0 m1.5 m2.0 m2.5 m3.0 ○ Total Length: 500mm 1000mm ○ Heat Treatment: High-frequency hardening of the teeth For more details, please contact us or download the catalog.

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At Kyoyu Gear Industry Co., Ltd., we utilize our expertise in the production of precision small standard gears to also accept custom orders (made-to-order gears) beyond standard products. We provide gear products tailored to our customers' needs starting from just one piece. Please inquire with your drawings and specifications. KG Gear Systems are equipped with high-precision KG gears, with backlash set to be below 15-20' for BS type, below 10-15' for BSH type, below 20' for HY-BOX, and below 25' for W-BOX during assembly. 【Features】 - Adopts a compact and simple design - Gears are completely packed, providing dust protection - Equipped with screw holes for easy installation - Lubrication is done with grease → BS type has no oil seal, W-BOX uses oil lubrication For more details, please contact us or download the catalog.

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We are pleased to introduce the new product "Tooth Area High-Frequency Quenched Spur Gears" from Kyoyuki Gear Industry Co., Ltd. Additionally, we have expanded our lineup of bevel gears, making additional processing easier. 【Tooth Area High-Frequency Quenched Spur Gears Specifications】 ○ Module: 1 ○ Accuracy: JIS B 1702-1 Grade 9 to 10 ○ Number of Teeth: 14 to 120 teeth, 18 types ○ Hardness: HRC 47 to 53 For more details, please contact us or download the catalog.

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KG helical gears / screw gears Mod. 1.0 to 4.0 S45C have the advantage of smoother engagement compared to spur gears, but they have the disadvantage of generating axial thrust due to the twisted tooth profile. Please design the bearings to adequately support the axial thrust. The module sizes are m1.0/m1.5/m2.0/m2.5/m3.0/m4.0. The pressure angle is 20 degrees (spur) and the twist angle is 45 degrees. RoHS compliant. For more details, please contact us or download the catalog.

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The KG Round Rack Mod. 0.5-1.0 in stainless steel is a gear that converts rotational motion into linear motion. The module sizes available are m0.5/m0.75/m0.8/m1.0. The pressure angle is 20 degrees (standard teeth), and it is RoHS compliant. For more details, please contact us or download the catalog.

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The KG internal gear Mod. 1.0 S45C has been enhanced with specifications centered around small module sizes. The module size available is m1.0. The number of teeth is primarily aligned with multiples of 12. The fitting tolerance for the outer ring is set to h8, allowing it to fit directly into holes such as those in housings. Please select the corresponding pinion from the KG spur gears. For more details, please contact us or download the catalog.

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KG internal gears Mod. 0.5 Mod. 0.8 in brass have been standardized primarily around small module sizes. The module sizes available are m0.5/m0.8. The number of teeth is mainly aligned to multiples of 12. The fitting tolerance for the outer ring is set to h8, allowing for direct fitting into holes such as those in housings. Please select the corresponding pinion from the KG spur gears. For more details, please contact us or download the catalog.

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• Other industrial robots
• Other food machinery

★Free gift of the latest version of the "Gear Grinding Gear & Spur Gear Digest Catalog"★ *In the 2017 edition, the number of teeth for the SGE and BF series has been expanded!* This is a digest catalog featuring a variety of new products, including "spur gears" with compact and wide-range small to medium module sizes, and "gear ground spur gears and gear ground rack gears" that are ideal for applications requiring high-speed rotation, high load, positioning accuracy, and quiet operation, all finished with gear surface grinding! *In the 2017 edition, the number of teeth for the SGE and BF series has been expanded!* We offer a wide range of tooth counts, tooth widths, and hole diameters to meet various needs! Custom orders and additional machining are accepted from just one piece! 【New Products】 ■ Gear Ground Rack Gear ■ Gear Ground Spur Gear Economy Type ■ Hardened Spur Gear ■ Spur Gear for Additional Machining ■ No-Backlash Gear ■ Gearbox ▼ You can view the digest version from "Download" ▼ The comprehensive catalog includes spur gears, worm gears, worm wheels, bevel gears, and more that are not listed in the digest version, so if you are interested, please apply through "Contact Us."

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As of May 20, 2012, some catalog products (standard items) will be discontinued. We apologize for any inconvenience this may cause and appreciate your understanding. ★The products marked with ■ (red text) in catalog KG904 are applicable★

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• Power Transmission Equipment
• Other machine elements

■Size Material: S45C, from module m1.0 to m3.0. Material: SUS304, from module m1.5 to m2.0.

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• Other conveying machines
• Food Packaging Machinery

The "Tooth Ground Spiral Miter Bevel / Fine Cut Miter" is a gear product handled by Kyouiku Gear Industry Co., Ltd., a manufacturer of standard gears and precision machinery. The "KG Tooth Ground Spiral Bevel Gear" is a high-precision spiral bevel gear finished to a precision of JIS B 1704 Class 1 or higher, suitable for high-strength specifications and high-speed operation. Additionally, the "Fine Cut Bevel," finished to a precision of JIS B 1704 Class 2 or higher, is produced with high precision without grinding the tooth parts, making it even more compact. You may consider cost reduction compared to the tooth ground products of the same series. 【Lineup】 ■ Spiral Miter Gear / Spiral Bevel Gear ■ Tooth Ground Spiral Miter Gear ■ Tooth Ground Spiral Bevel Gear ■ Fine Cut Miter Gear *For more details, please refer to the PDF materials or feel free to contact us.

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The "Gear System (Gearbox)" incorporates high-precision KG gears, with backlash set to be below 15 to 20' for the BS type, below 10 to 15' for the BSH type, below 20' for the HYBOX, and below 25' for the W-BOX during assembly. It features a compact and simple design, and since the gears are fully packed, it provides dust protection. Additionally, it has been processed with screw holes for easy installation. 【Features】 ■ Adopts a compact and simple design ■ Fully packed gears provide dust protection ■ Incorporates high-precision KG gears ■ Easy installation due to processed screw holes ■ Lubrication is grease-filled (the BS type does not have an oil seal) (W-BOX has oil lubrication) *For more details, please refer to the PDF materials or feel free to contact us.

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The "kasa gear" is a type of gear that bends the axis angle at a right angle to accurately transmit rotation. There are straight teeth and curved teeth (spiral), and the S45C products also include high-frequency hardened versions of the teeth. The speed ratios available are 1:1, 1:2, and 1:3. 【Features】 ■ MGH series complete products that can be used without additional processing based on hole diameter ■ High-frequency hardened teeth, keyway, and tapped products *For more details, please refer to the PDF materials or feel free to contact us.

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★Free gift of the "Gear Grinding Gear and Spur Gear Comprehensive Catalog" and the Blue POM Series Catalog together!★ The "Gear Grinding Gear and Spur Gear Comprehensive Catalog" features a large volume of several hundred pages, including many new products such as "spur gears" available in compact and wide range small to medium module sizes, and "gear grinding spur gears and rack gears" that are optimal for high-speed rotation, high load, positioning accuracy, and quiet operation! *In the 2016 edition, the number of teeth for the SGE and BF series has been expanded! The "Blue POM Gear Series" is a food contact gear series that is ideal for food and packaging equipment compliant with regulations for food contact applications in the US and EU markets. It uses the color "blue," which is not found in food materials, effectively preventing foreign material contamination in products. ▼ You can view the digest version of KG2003 from "Download" ▼ *The Blue POM Gear Series will be the complete version. If you would like the complete version of KG2003, please apply through "Contact Us."

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The "No Backlash Gear" responds to the need to eliminate backlash to "0" with the development of the mechatronics industry. We offer both tooth surface cutting finish and grinding finish. The no backlash mechanism includes a method that removes backlash using the force of a spring and a method that controls backlash through bolt fixation. 【Features】 ■ NSU, NS, NSG Series - Method to eliminate backlash using the force of a spring - Uses the spring force to clamp the opposing teeth ■ ASG Series - Bolt-fixed control backlash gear - Capable of transmitting high precision and high load *For more details, please refer to the PDF materials or feel free to contact us.

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Introducing the new product from Kyoyuki Gear Industry Co., Ltd., "High-Frequency Hardened Spur Gears." We have expanded our lineup of bevel gears that are easy to process further. We offer spur gears, miter gears/bevel gears, spiral miter/bevel gears, etc., that comply with RoHS standards (products produced from November 2016 onwards are compliant with the RoHS directive). 【High-Frequency Hardened Spur Gear Specifications】 ○ Module: 1 ○ Accuracy: JIS B 1702-1, Grade 9-10 ○ Number of Teeth: 14 to 120 teeth, 18 types ○ Hardness: HRC 47-53 【We also accept custom gear orders!】 Utilizing our expertise in the production of precision small standard gears, we also accept custom orders (made-to-order gears) beyond standard products. We can provide them from just one piece with short lead times and low costs! *For more details, please contact us or download the catalog.

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"Flat gears" offers a wide range of compact and wide-range small module sizes, as well as a variety of high-quality medium module size flat gears. We have a rich selection of 11 sizes ranging from module m0.5 to m5.0, and you can choose from materials such as acetal, SUS304, brass, and S45C. 【Specifications】 ■ Size: m0.3 to m5 ■ Material: Acetal, SUS304, Brass, S45C ■ Tooth width: Available in two types for light and heavy loads ■ Fastening: Set screws and keyway options available *For more details, please refer to the PDF document or feel free to contact us.

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The "Helical Screw Gear" is a helical gear that can be used as a parallel shaft (helical gear) or at a right angle (screw gear). Materials available include acetal, SUS304, and S45C (high-frequency hardened teeth). Sizes range from m1 to m4. 【Specifications】 ■ Size: m1 to m4 ■ Material: Acetal, SUS304, S45C (high-frequency hardened teeth) *For more details, please refer to the PDF document or feel free to contact us.

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We offer custom gears starting from one piece with short delivery times and low costs. We will solve your problems using the know-how gained from manufacturing KG gears!! ◆ Special environment specifications ◆ High-speed rotation specifications ◆ Space-saving designs Leveraging our expertise in producing precision small standard gears, we also accept custom orders for non-standard products (made-to-order gears).

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The worms with a module of 0.5 to 2.0 for the "Warm/Warm Wheel" are produced by cold rolling. The surface roughness is finished to be below 0.8a (3.2S), making it a gentle worm for the counterpart wheel (especially for resin materials). The surface of the screw face has improved hardness due to work hardening, and since the metal fiber structure is not cut, its mechanical properties are superior compared to those produced by cutting. 【Features (excerpt)】 ■ Worms with a module of 0.5 to 2.0 are made by cold rolling. ■ The surface hardness after rolling is 1.2 to 1.3 times that of the base material. ■ The hardness of the screw face is HB240 to 260. ■ Rolled worms have a mirror-like surface roughness on the screw face, so when used in combination with a worm wheel, their lifespan is longer compared to combinations with worms produced by cutting. *For more details, please refer to the PDF document or feel free to contact us.

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A "rack" is a gear that converts rotational motion into linear motion. Starting with racks of module 0.5/0.8/1/1.5, we also have new products such as polyacetal (blue) racks and racks with mounting holes in our lineup. Additionally, we offer a wide range of products tailored to various applications, including circular pitch "CP racks" and "CP rack pinions." 【Specifications】 ■ Size: m0.3 to m5, CP2, 5, 10 ■ Material: SUS304, brass, S45C, polyacetal *For more details, please refer to the PDF document or feel free to contact us.

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Size: m0.5, m0.8, m1.0 Material: Brass, S45C

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This is a specialized technical document that provides detailed information about gears. If you have any questions about gears, please refer to this first! It can also be downloaded from our company website. We are distributing the booklet for free. Please feel free to contact us.

• Technical and Reference Books
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We at Kyouiku Gears will solve the issues you have with gears. ◆ How to select KG standard gears ◆ How to purchase ◆ Request for the KG STOCK GEARS comprehensive catalog ◆ Consultation for additional processing of KG standard gears ◆ Consultation for custom gears / made-to-order gears ◆ Other technical inquiries Please feel free to consult us about anything. Phone: 0120-7-8960-7 * Phone reception is available on weekdays (excluding weekends and holidays) from 8:00 AM to 5:00 PM Email: sales@kggear.co.jp

• Power Transmission Equipment
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