株式会社冨士精密 List of Products and Services

The "GU-NUT" is a locking nut that adopts a large 270° friction ring to meet the loosening prevention performance specified in JIS B1056, utilizing the friction ring of the "U-NUT." We have enhanced the loosening prevention performance, pursuing further safety and peace of mind. It complies with JIS B1056 "Pre-Loading Torque Type Steel Hex Nut." 【Features】 ■ Complies with JIS B1056 "Pre-Loading Torque Type Steel Hex Nut" ■ The shape of the friction ring has been expanded to 270°, improving performance ■ As a high torque type, the loosening prevention function is further enhanced ■ Prevents early detachment even if axial force decreases *For more details, please refer to the PDF document or feel free to contact us.

"U-NUT" and "FINE U-NUT" are adopted in various medical devices such as wheelchairs and digital panorama X-ray imaging equipment. "U-NUT" is a locking nut that is active in various industries ranging from cars, motorcycles, and industrial machinery to steel structures like railways and bridges. "FINE U-NUT" is a locking nut specifically for bearings used in rotating shafts of industrial machinery such as ball screws and spindles. We offer a rich lineup including the reliable locking nut "U-NUT" that ensures secure fastening, and the bearing locking nut "FINE U-NUT" that eliminates the need for traditional keyway machining of shafts and the installation of toothed washers. We also have the precision lock nut "TWIN FU-NUT," which further enhances the locking performance of FINE U-NUT with two friction rings. We also accept orders for custom shapes. 【Product Lineup】 ■U-NUT ■FINE U-NUT ■TWIN FU-NUT *For more details, please refer to the PDF materials or feel free to contact us. *3D CAD data is also available for download.

The "FINE U-NUT" is a locking nut for bearings that eliminates the need for traditional keyway machining of shafts and the installation of toothed washers. It allows for arbitrary and appropriate positioning, and torque management is also easy. It generates "power" in various industrial machines and improves the rotational balance of bearings. Additionally, it has achieved a reduction in rotational loss of equipment and a decrease in power consumption. 【Features】 ■ Reusability: Can be reused ■ Easy fastening: No skilled techniques required ■ Labor-saving simplification: No keyway machining of shafts needed ■ Balance: Improved rotational balance of shafts and bearings ■ Lightweight: Can use thinner hollow shafts than before ■ Cost reduction: No need for traditional machining, parts, or techniques *For more details, please refer to the PDF document or feel free to contact us. *CAD data is also available for download.

The "FINE U-NUT" and "TWIN FU-NUT" are bearing locking nuts that eliminate the need for traditional keyway machining on shafts and the installation of toothed washers. They are ideal for counteracting loosening due to vibrations during motor operation and reverse rotation from high-speed rotation. They allow for arbitrary and appropriate positioning, making torque management easy. They generate "power" in various industrial machines and improve the rotational balance of bearings. Additionally, they have achieved a reduction in rotational losses of equipment and a decrease in power consumption. 【Features】 ■ Reusability: Can be reused ■ Easy fastening: No skilled techniques required ■ Labor-saving simplification: No keyway machining on shafts needed, simplifying installation work ■ Balance: Improved rotational balance of shafts and bearings ■ Lightweight: Can use thinner hollow shafts than before ■ Cost reduction: No need for traditional machining, parts, or techniques *For more details, please refer to the PDF document or feel free to contact us. *CAD data is also available for download.

The "FINE-U NUT TOOLSET 00-10" is a dedicated tightening tool set for FINE U-NUTs from M10 to M50. This tool set includes a socket and ratchet handle for fastening the "FINE U-NUT," which allows for arbitrary and appropriate positioning. We also offer dedicated tightening tools for FINE U-NUTs from M55 to M100. *For more details, please refer to the PDF document or feel free to contact us.*

"TWIN FU-NUT" is a precision lock nut of the pre-breling torque type. With two friction rings (special springs), it further enhances the anti-loosening performance of the "FINE U-NUT." By simultaneously machining the screw and the seating surface, the runout accuracy of the seating surface relative to the screw is secured to the 1,000 micrometer range (mm). This product, which combines high runout accuracy and anti-loosening functionality, maintains precise bearing rotation at all times. 【Features】 ■ Precision lock nut of the pre-breling torque type ■ Enhanced anti-loosening performance of the FINE U-NUT ■ Tightening is completed simply by tightening the nut ■ Reusable ■ Screw accuracy is ISO4H *For more details, please refer to the PDF document or feel free to contact us.

The "Fine U-Nut" allows for arbitrary and precise positioning and makes torque management easy. Furthermore, it is a revolutionary locking nut for bearings that eliminates the need for keyway machining on shafts, washers, and installation techniques. It improves the rotational balance of bearings that generate power in various machinery industries. This product is also used in industrial robots, with examples of being supplied as parts for welding robots, small molded part extraction robots, and automotive welding robots. 【Features】 ■ Arbitrary and precise positioning possible ■ Easy torque management ■ Improves the rotational balance of bearings * For more details, please refer to the PDF document or feel free to contact us. * CAD data is also available for download.

The "Fine U-Nut" allows for arbitrary and appropriate positioning and makes torque management easy. Furthermore, it is a revolutionary locking nut for bearings that eliminates the need for keyway machining on shafts and washer mounting technology. It improves the rotational balance of bearings that generate power in various machinery industries. This product has been adopted by numerous machine tools and has a proven track record as a component for drill machines for shaped steel and NC rotary tables. 【Features】 ■ No need for keyway machining on shafts ■ No need for washer mounting technology ■ Reusable ■ Arbitrary and appropriate positioning possible ■ Easy torque management ■ Improves the rotational balance of bearings ■ Enables total cost reduction *For more details, please refer to the PDF document or feel free to contact us. *CAD data is also available for download.

The "Fine U-Nut" allows for arbitrary and appropriate positioning, making torque management easy. Furthermore, it is a revolutionary locking nut for bearings that eliminates the need for keyway machining on shafts, washers, and installation techniques. It improves the rotational balance of bearings, generating power in various machinery industries. This product is also used in electrical applications and has been supplied as a component for semiconductor automatic sealing devices. 【Features】 ■ Allows for arbitrary and appropriate positioning ■ Easy torque management ■ Improves the rotational balance of bearings *For more details, please refer to the PDF materials or feel free to contact us. *CAD data is also available for download.

The "Fine U-Nut" allows for arbitrary and precise positioning, making torque management easy. Furthermore, it is a revolutionary locking nut for bearings that eliminates the need for keyway machining on shafts, washers, and installation techniques. It improves the rotational balance of bearings that generate power in various machinery industries. This product is also used in machinery and equipment, with examples of being supplied as parts for pumps, digital panoramic X-ray imaging devices, and spindles. 【Features】 ■ Arbitrary and precise positioning is possible ■ Easy torque management ■ Improves the rotational balance of bearings * For more details, please refer to the PDF materials or feel free to contact us. * CAD data is also available for download.

The "Fine U-Nut" allows for arbitrary and precise positioning, making torque management easy. Furthermore, it is a revolutionary locking nut for bearings that eliminates the need for keyway machining on shafts, washers, and installation techniques. It improves the rotational balance of bearings that generate power in various machinery industries. This product is also used in processing machines, with examples of it being supplied as parts for cold press machines, food machinery, food processing machines, and presses. 【Features】 ■ Arbitrary and precise positioning is possible ■ Easy torque management ■ Improves the rotational balance of bearings * For more details, please refer to the PDF materials or feel free to contact us. * CAD data is also available for download.

The "Fine U-Nut" allows for arbitrary and precise positioning, making torque management easy. Furthermore, it is a revolutionary anti-loosening nut for bearings that eliminates the need for keyway machining on shafts, washers, and installation techniques. It improves the rotational balance of bearings that generate power in various machinery industries. This product is also used in conveyors, with examples of it being supplied as electric lift and slab components for steel mills. 【Features】 ■ Arbitrary and precise positioning is possible ■ Easy torque management ■ Improves the rotational balance of bearings * For more details, please refer to the PDF materials or feel free to contact us. * CAD data is also available for download.

The "U-NUT" is a locking nut that is active in various industries, including motorcycles, four-wheel vehicles, industrial machinery, as well as construction, railways, and steel structures. The "FINE U-NUT" is a locking nut for bearings that is used primarily around rotating shafts in machine tools and industrial machinery, such as ball screws and spindles. Additionally, the "TWIN FU-NUT" is adopted in precision lock nuts for machine tools that require high thread accuracy and in cases where further measures against loosening are necessary. We offer a rich lineup, including the locking nut "U-NUT" that ensures reliable fastening, the bearing locking nut "FINE U-NUT" that eliminates the need for traditional keyway machining and tooth washer installation for shafts, and the precision lock nut "TWIN FU-NUT," which further enhances the loosening prevention performance of the FINE U-NUT with two friction rings. We can also manufacture special shapes in consultation with our customers. *For more details, please refer to the PDF materials or feel free to contact us. *3D CAD data is also available for download.