Chugoku Seira plants are located in quiet, natural environments that are perfect places for manufacturing products that require precision. The interior of each plant is kept clean and free from dirt and oil stains, and special care is taken to prevent contamination by foreign matter. Air conditioning equipment prevents smoke and fumes from becoming trapped inside the plant.
We use the latest production equipment, including nut presses, nut formers, header and bolt formers, tapping machines, and in some cases have added our own modifications. In general, this equipment is controlled by computer, and quality checks at the material processing stage are also automatically controlled. This system not only provides stable quality and high accuracy, but also streamlines personnel costs and reduces the price of supplied products.
One characteristic of Chugoku Seira is our very small number of employees, because the manufacturing process is automated by machines. Our personnel’s main role is to focus on the operation and management of various automated equipment (operation available 24 hours), the inspection of each lot during processing, and the visual inspection of finished products. In addition to filling in daily work reports, they attach work standard sheets and product tags to every product. A product tag is like a resume. It describes the profile (specifications) of the part in detail. We take pride in having the best accuracy, management system, and employee level in the industry, and we strive to make improvements every day.
| Production equipment | Manufacturer | No. of units |
|---|---|---|
| NF-520S Nut Former | Sakamura Machine Co., Ltd. | 1 |
| NF-525S Nut Former | Sakamura Machine Co., Ltd. | 1 |
| NF-530S Nut Former | Sakamura Machine Co., Ltd. | 1 |
| NF-530SSA Nut Former | Sakamura Machine Co., Ltd. | 1 |
| PF-530S Parts Former | Sakamura Machine Co., Ltd. | 1 |
| PF-530SS Parts Former | Sakamura Machine Co., Ltd. | 1 |
| PF-540 Parts Former | Sakamura Machine Co., Ltd. | 1 |
| PF-550 Parts Former | Sakamura Machine Co., Ltd. | 1 (warm former) |
| PF-660 Parts Former | Sakamura Machine Co., Ltd. | 1 |
| BPF-550SS Bolt Parts Former | Sakamura Machine Co., Ltd. | 1 (warm former) |
| BPF-630 Bolt Parts Former | Sakamura Machine Co., Ltd. | 2 |
| BPF-640SS Bolt Parts Former | Sakamura Machine Co., Ltd. | 3 (1 is a warm former) |
| BPF-650SS Bolt Parts Former | Sakamura Machine Co., Ltd. | 2 |
| BPF-670SSL Bolt Parts Former | Sakamura Machine Co., Ltd. | 1 |
| AT-635 | Asahi Sunac Corporation | 1 |
| AT-1075 | Asahi Sunac Corporation | 1 |
| AOT-12B | Asahi Sunac Corporation | 1 |
| RH-80 | Asahi Sunac Corporation | 1 |
| NP-80 | Nakashimada Engineering Works, Ltd. | 1 |
| NP-120 | Nakashimada Engineering Works, Ltd. | 1 |
| AQ-1013-3 | Asahi Sunac Corporation | 1 |
| ST-650 | Asahi Sunac Corporation | 1 |
| SRH-120 | Asahi Sunac Corporation | 1 |
| AT-875 | Asahi Sunac Corporation | 1 |
| ST-810 | Asahi Sunac Corporation | 1 |
| SUPER-3 Type Tapping Machine | Tokyo Tapping Machine Co., Ltd. | 28 |
| SUPER-4 Type Tapping Machine | Tokyo Tapping Machine Co., Ltd. | 3 |
| SUPER-5 Type Tapping Machine | Tokyo Tapping Machine Co., Ltd. | 11 |
| SUPER-7 Type Tapping Machine | Tokyo Tapping Machine Co., Ltd. | 3 |
| LR-120 Straight Tapping Machine | Tokyo Tapping Machine Co., Ltd. | 1 |
| Rolling Machine | Subaru Seiko Co., Ltd. | 1 |
| Rolling Machine (3 rotary) | Nissei Co., Ltd. | 1 |
| Rolling Machine | Sanmei Works Co., Ltd. | 7 |
| Rolling Machine | Kyoei Co.,Ltd. | 1 |
| Rolling Machine | Iiduka Seisakusho Co., Ltd. | 1 |
| Rolling Machine | Sakamura Machine Co., Ltd. | 2 |
| Hydraulic Press HYP2000N | Japan Automatic Machine Co., Ltd. | 1 |
| Inspection equipment | Manufacturer | No. of units |
|---|---|---|
| 2D Image Measuring Machine | Mitutoyo Corporation | 1 |
| Universal Testing Machine 300kN | Tokyo Koki Testing Machine Co., Ltd. | 1 |
| Projection Machine | Mitutoyo Corporation | 1 |
| Rockwell Hardness Tester | Matsuzawa Seiki Co.,Ltd. | 1 |
| Micro Vickers Hardness Tester | Mitutoyo Corporation | 1 |
| Profile Measuring Machine | Mitutoyo Corporation | 1 |
