For small outdoor work machinery! A case where toughness (resilience) was enhanced through high-frequency tempering.
We would like to introduce a case study of machining crankshafts for agricultural machinery at our company. After performing center hole processing for lathe machining, we carried out outer diameter turning, threading, and drilling on the shaft section. We requested a specialized partner company for heat treatment, which hardens the surface. At this time, if the heat treatment penetrates too much into the threaded section, it can become brittle, which is critical for shafts that require toughness. Therefore, we enhance toughness (ductility) through high-frequency tempering. 【Case Overview】 ■ Product Classification: Crankshaft ■ Delivery Industry: Outdoor machinery manufacturers ■ Application: Small outdoor machinery ■ Material: SCM415 ■ Size: L65mm (Flange part: φ53mm) × φ15 × φ10 *For more details, please refer to the PDF document or feel free to contact us.
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【Processing Details】 ■ After rough material shaping by hot forging - Center hole machining - Outer diameter turning - Drilling - Oil hole drilling - Outer diameter grinding - Hole grinding - Inspection - Shipping and packaging *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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Toyo Manufacturing Co., Ltd. is a metal processing company headquartered in Fuchu City, Tokyo, with a group company, Toyo Kyushu Co., Ltd., located in Bungo-Takada City, Oita Prefecture. Currently, we mainly engage in the manufacturing and sales of automotive parts (including critical safety components) and agricultural machinery parts. We excel in mass production but also accommodate prototypes, especially in pre-mass production prototypes, where we propose value engineering (VE) with an eye toward mass production. 【Main Products】 Stub shafts (automotive parts), drive shafts (automotive parts), balance shafts (automotive parts), crankshafts (outdoor machinery parts), drive pinions (automotive parts), motor shafts (automotive parts), etc. 【Certifications Obtained】 Quality Management System: ISO 9001:2015 Environmental Management System: KES Step 2 【Awards and Achievements】 2005 Tokyo Small and Medium Enterprises Manufacturing Human Resource Development Award (A recognition system for small and medium enterprises that have achieved results in the development of excellent skilled workers and the inheritance of skills, as recognized by Tokyo Metropolitan Government) 2022 Minister of Health, Labour and Welfare Award for Excellent Business in Skill Promotion (A recognition for establishments and organizations that have made significant contributions to skill promotion over many years and serve as models for others.)