FORGED PRODUCTS
Since its establishment, we have focused our efforts on manufacturing difficult-to-produce irregular forged parts. Through our time-tested technology and rational forging production system, we mass-produce high-precision, high-strength products. Furthermore, in our hot forging process, artisans with national trade qualifications use air drop hammers to forge materials such as steel, appraising the exquisite finish with their eyes and skills.
Sanjo Machine Works' technology utilized in automobile engine parts
Main Products
Our connecting rods are important safety parts for engines.
Despite an average weight of only 0.3 kg, we mass-produce uniquely shaped parts requiring extremely high precision and strength through hot forging, and have built a high share in the production of four-wheel and two-wheel engine connecting rods for many Japanese automobile manufacturers, including domestic, export, and knockdown production.
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Connecting rod
A connecting rod is the link (connecting bar) that joins the piston and the crankshaft inside an engine. It is a part that converts the reciprocating linear motion of the piston, caused by the force of an internal explosion, into rotational motion. Because the piston is pushed down at high pressure and high speed, the connecting rod must be very strong, precise, and lightweight.
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Rocker Arm
This is one of the valve train parts installed within the cylinder head inside the engine, and because it plays the role of receiving power from the camshaft and operating the valves, it is a part that requires high precision, strength, and light weight.
Range of Production Capability
| Forging method | Hot die forging |
|---|---|
| Types of forging | Hammer forging, Press forging |
| Materials | Structural steel, Aluminum alloys, Titanium alloys |
| Product Weight | Weight: 100g to 1000g (main focus) Note: We can accommodate weights up to approximately 10 kg depending on conditions. |
| Features | In-house completion from die design to production by the development department. |
|---|---|
| Lightweighting through the adoption of high-strength steel and non-quenched, tempered steel. | |
| Integrated production system from forged materials to machining. | |
| Post-process reduction and high-precision forging through precision hole punching. |
Equipment
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Air Drop Hammer
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Fully Automated Forging Press Line
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3D(CAD・CAM・CAE)
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5-Axis Machining Center
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Heat Treatment
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Processing Line
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