Ratchet mechanism, won't loosen due to the biting protrusion. New type of small-diameter cap bolt.
The "W-V-LOCK Yurumanzō New Model" employs a ratchet mechanism between the bolt, nut, and washer, and additionally features protrusions on the bottom surface of the washer that bite into the workpiece, successfully eliminating loosening almost permanently. This product is the new model of "W-V-LOCK Yurumanzō," in the hex socket bolt (small diameter cap bolt) type. 【Features】 ■ The bolt and washer are connected using a ratchet system, with several protrusions on one side of the seating surface. ■ The protrusions bite into the tightened object in a wedge shape, preventing the washer from rotating. ■ It does not loosen even under strong vibrations or long-term use. ■ If removal of the screw is necessary, it can be removed by applying a slightly higher loosening torque than the tightening torque. *For more details, please refer to the PDF document or feel free to contact us.
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【Type】 ■Type M-L ・WVCBS 5-L ・WVCBS 6-L ・WVCBS 8-L ・WVCBS 10-L ・WVCBS 12-L *For more details, please refer to the PDF document or feel free to contact us.
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For more details, please refer to the PDF document or feel free to contact us.
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Marunaka Co., Ltd. has established a consistent production system centered on metal pressing as its core technology, encompassing everything from mold design and manufacturing to parts processing (pressing, welding, cutting, polishing, and cathodic electrodeposition coating) and assembly. The company manufactures automotive parts, office equipment parts, and household parts, among others. In particular, it focuses on enhancing the sophistication of molds, which significantly affect the precision and labor involved in pressing. Marunaka has a dedicated section for mold design and manufacturing, working on improvements in pressing processes through innovative mold designs. By conducting all processes related to metal press parts, including molds, in-house, the company enhances its ability to respond to QCD (Quality, Cost, Delivery) requirements, striving to supply higher quality parts at appropriate prices and with speed. Additionally, leveraging the accumulated know-how from metal pressing, Marunaka is advancing research and development of original products, such as the "W-V-LOCK" bolts and nuts that do not loosen under strong vibrations. As a technical group specializing in metal press parts, Marunaka Co., Ltd. is committed to skill enhancement, upgrading equipment, and strengthening its integrated production system to meet customer demands at a high level.