大窪鐵工所 List of Products and Services

Our company features a processing line for mass production and a variety of products, with different types of production lines located within a single factory. To meet our customers' expectations, we deliver excellent products through advanced production technology and reliable manufacturing management. 【Product Lineup】 ■ Pins ■ Swing Motors ■ Hydraulic Multi-Control Valve Components ■ Hydraulic Pump Components ■ Travel Motors ■ Track Rollers *For more details, please feel free to contact us.

• Hydraulic Equipment

"Are you struggling with procurement costs?" In recent times, it has been said that we have entered the VUCA era. With rising raw material costs and increasing labor expenses, the business environment is becoming increasingly challenging. To secure stable profits, thorough cost management and cost reduction are becoming essential. Many of you may be troubled by the costs of procurement parts. At Okubo Iron Works, we achieve cost reductions through active technological development even after mass production begins, enhancing productivity and improving quality. We have 45 certified skill assessors (about 60% of all operators). Our team of professionals is fully committed to supporting your company!

• Hydraulic Equipment

At Okubo Iron Works, we handle all processes from material procurement, bar steel cutting, general heat treatment, general surface treatment, machining, to inspection in-house! 【Equipment Owned】 - NC Lathes: 49 units (horizontal and vertical) - Machining Centers: 30 units (horizontal and vertical) - Grinding Machines: 29 units (centerless, cylindrical, internal, flat, double-sided flat, rotary, lap) - Saws: 5 units (circular and band) - Centering Machines: 4 units - Welding Robots: 5 units - High-Frequency Quenching Equipment: 1 unit For more details, please feel free to contact us!

• Hydraulic Equipment

"Is this okay?" You might find the answer right away! On the FAQ page of Okubo Iron Works, we carefully answer the questions submitted by everyone. If you can't find the answer, please feel free to contact us.

• Hydraulic Equipment

We have acquired factory land in the Kasai Industrial Park in Kasai City, Hyogo Prefecture. In response to our customers' requests, we will enhance our production capacity while actively working on the development of new products. With our solid technical skills and trust built through years of transactions with major manufacturers, we provide satisfactory QCD (Quality, Cost, Delivery). Not only processing, but we also have a clean room for assembly, inspection, and other services. The industrial park's proximity to IC facilities ensures a good transportation environment with no logistics issues! We will deliver promptly according to your needs. We promise to provide the optimal environment as a partner that can contribute to your company's growth. Shall we create new business opportunities together? We welcome inquiries for estimates only! Please feel free to contact us.

• Hydraulic Equipment

Our company is an organization filled with youthful energy, with approximately 60% of our employees being 39 years old or younger. We are committed to talent development across the entire company, and through the early empowerment of young employees, we now have employees in their 20s actively serving as leaders in their departments. We also focus on technology transfer, valuing the passing of knowledge and skills from experienced senior employees to younger staff. Although we are a historically established company founded in 1948, we are always engaged in initiatives that look toward the next generation. The energy of the younger generation and their adaptability to new technologies are our strengths. Moving forward, we aim to support the growth of our young employees while providing greater value to our customers and growing together. We invite you to consider us as your new business partner!

• Hydraulic Equipment

At the third factory, we process parts used in hydraulic multi-control valves for Kawasaki Heavy Industries, and we have established a production system that can flexibly accommodate irregularly shaped products and a variety of small-lot items. Additionally, in assembly work conducted in a clean room, we thoroughly eliminate foreign matter and contamination to ensure high-precision products. We also conduct pressure tests using leak testers to rigorously verify the quality and reliability of our products. In recent years, we have become the only facility within the company to handle aluminum processing, broadening our technical capabilities to meet the needs of more diverse fields and promote technological innovation. In this way, our factory achieves high quality assurance and continues to evolve.

• Hydraulic Equipment

At Factory No. 5, we process hydraulic motor parts for Kawasaki Heavy Industries and have introduced a unique U-shaped line for single-piece flow production at Okubo Iron Works. This production system allows us to flexibly respond to fluctuations in customer order quantities. Additionally, we have a general-purpose line that excels in low-volume, high-variety production, enabling us to meet various needs. Furthermore, our factory has space for equipment expansion, allowing us to quickly respond to future increases in production capacity and new demands. We aim to evolve our factory alongside our customers' growth and will continue to pursue further improvements in productivity.

• Hydraulic Equipment

We would like to introduce a case study regarding the implementation of a tool balancer. In the assembly process of Factory No. 3, production is required at a pace of 280 pieces per shift, approximately one piece every 1.7 minutes, making the efficiency of work and actions extremely important. Tools were arranged on the workbench for easy access, but as a result, the workspace became cramped and somewhat uncomfortable. To improve this situation, we introduced a tool balancer. With this new tool, the need for a designated place for assembly tools was eliminated, expanding the workspace and allowing for more efficient work. Additionally, we were able to bring the parts boxes closer to the workers, making it easier to access the parts. 【Case Overview】 ■ Issues - The workspace was cramped, leading to decreased efficiency. - The arrangement of tools created a tight situation. ■ Results - The introduction of the tool balancer expanded the workspace. - Parts became easier to access, improving work efficiency.

• Hydraulic Equipment

We have summarized the improvement initiatives of the six outstanding workplaces selected from a total of 18. These improvements are based on the challenges that arise in daily operations and the voices from the field. Making improvements based on these field voices forms the foundation of our daily operations and leads to VE proposals, which are a strength of Okubo Iron Works. Please take a look! If you are interested after reviewing the materials, you are always welcome to visit our factory!

• Hydraulic Equipment

We would like to introduce the improvement case of the workplace that was selected as MVP among all 18 workplaces. In our workplace, we implemented a one-piece flow cell production system and conducted improvement activities over the course of a year with the theme of "increasing productivity." Our achievements were recognized, and we were chosen as MVP for having the most outstanding efforts among all 18 workplaces. For specific details on the improvements, please refer to the attached materials. Additionally, we would appreciate it if you could also check the materials related to the 5th factory where the target workplace is located. If you are interested, we are always accepting inquiries for factory tours, so please feel free to contact us!

• Hydraulic Equipment

We would like to introduce a case study on solving product issues for Company A, a comprehensive engineering manufacturer. In addition to requests from customers and external environments, such as improving process capability aimed at achieving zero outflow defects and intensifying competition with overseas manufacturers, there was a demand for improving the profitability of the production line for the relevant products based on departmental profitability management within the company. To address this, we reduced the work clamping torque of the lathe processing jig, which helped suppress chucking distortion and achieve improvements and stability in shape accuracy. Previously, we guaranteed the same level of precision by lowering processing conditions and conducting careful machining. However, with the above improvements, we were able to reduce the number of machining passes and enhance processing conditions, resulting in a maximum reduction of processing time by 37% and achieving over a 20% improvement in productivity indicators.

• lathe

We would like to introduce a machining case study of products for Company A, a comprehensive engineering manufacturer. In addition to applying minor shape corrections during turning, we eliminate the effects of heat treatment distortion by selecting appropriate grinding wheels, jigs, and processing conditions during the surface grinding process, ensuring that important dimensions such as flatness and parallelism are reliably achieved. Turning → Heat Treatment (Outsourced) → Surface Grinding → Lapping Please feel free to contact us when you need our services. 【Case Overview】 ■ Material: SUJ2 ■ Machining Methods: Turning, Surface Grinding, Lapping *For more details, please feel free to inquire.

• Hydraulic Equipment

We would like to introduce a case study of milling and drilling processing at Company A, a comprehensive engineering manufacturer. This case study is from the third factory of Okubo Iron Works. In the processing of the material "FCD450," we used a custom jig to meet the customer's quality requirements and reduce distortion. We achieved the required flatness and surface roughness without leaving cutter seams. 【FCD450 Case Overview】 ■ Material: FCD450 ■ Processing Method: Milling and Drilling ■ Key Points during Processing (Milling) - Used a custom jig to reduce distortion and performed single-pass processing with a Φ200 milling cutter. - Achieved the required flatness and surface roughness without leaving cutter seams. *For more details, please feel free to contact us.

• Processing Contract

We are gathering the strengths of each factory and actively reducing costs through in-house production of parts. With the theme of improvement, Okubo Iron Works aims to achieve its goals through a year-long activity! This time, we will introduce "in-house production of processing parts," which is expected to lead to significant cost reductions through collaboration between factories. (Before Improvement) - Spindle Part A: ¥15,300 - Spindle Part B: ¥14,200 Using three of each per month, the cost is ¥88,500/month. (After Improvement) Requesting processing from another workplace within the same factory. Consolidating the parts into one produced in-house, with in-house production costs of ¥1,439. Using three per month, the cost is ¥4,317/month. Effect: ¥88,500/month → ¥4,317/month (approximately 95% cost reduction)

• Hydraulic Equipment

We would like to introduce a case where a computer cover was created for the headquarters factory, which manages inventory and delivery schedules using a document called a manufacturing instruction sheet. Previously, computers were placed directly on the workbench, posing a risk of getting dirty from oil mist and coolant splashes from the processing machines. Therefore, we carefully measured the dimensions of the workbench, created our own drawings, and then ordered L-shaped angles. As a result, a perfectly sized cover was completed. By creating something that fits our work environment instead of purchasing off-the-shelf products, we were able to keep costs down while installing a user-friendly cover. This allowed us to keep the factory computers clean and make the work environment more comfortable. 【Case Overview】 ■Challenge: Computers were directly placed on the workbench, which posed a risk of getting dirty from oil mist and coolant splashes emitted from the processing machines. ■Manufacturing Method: - We fixed the purchased L-shaped angles with screws to assemble the frame of the cover. - To prevent dirt, we attached acrylic panels to the top and sides and secured them with screws. *For more details, please feel free to contact us.

• Hydraulic Equipment

We would like to introduce an improvement case regarding a movable oiling table. The 4th factory of Okubo Iron Works is characterized by a large number of large and heavy products. After machining, maintenance, and inspection, thorough rust prevention treatment is performed on the entire product and inside all processing holes. However, with the conventional fixed workbench, the movement of products after rust prevention treatment was done manually, which placed a heavy burden on the workers due to the weight of the products and also posed a risk of dropping them. To improve this situation, we introduced a movable oiling table. This new system significantly reduces the burden on workers, enhances safety, and improves work efficiency. Additionally, the ability to work without dirtying the surrounding area is a major advantage. 【Case Overview】 ■ Issues - Manual transportation of products from the workbench to the rust prevention table. - Due to the weight, there is a significant burden on workers and a risk of dropping. ■ Results - Significantly reduced the burden on workers and improved safety. - Achieved improvements in work efficiency and increased productivity. *For more details, please feel free to contact us.

• Hydraulic Equipment

We would like to introduce an improvement case regarding rain protection covers for shipping pallets. Until now, we manually covered the products and containers with a cover during each shipment to ensure their protection against sudden weather changes. However, this task took a lot of time and required a large number of bags, leading to cost-related challenges. Therefore, we have assembled a cover using plastic cardboard (pla-dan) and created a new enclosure with a lid that perfectly fits the pallet. As a result of this improvement, the time taken for the task has been reduced from the conventional 4-5 minutes to just 2 minutes. Additionally, the amount of bags used has been significantly reduced, contributing to cost savings. This has greatly improved work efficiency, achieving both faster shipping operations and cost reductions simultaneously. 【Case Summary】 ■ Issue: Rain protection measures for pallets - The time required for shipping tasks was long, leading to decreased efficiency. - The bags used were difficult to reuse and were almost disposable. ■ Improvement Results - Reduced work time from the conventional 4-5 minutes to 2 minutes, significantly enhancing work efficiency. - By discontinuing the use of bags, we successfully reduced consumable costs and compressed expenses.

• Hydraulic Equipment

Our company features a processing line for mass production and a variety of products, with production lines of different natures all located within a single factory. Based on our achievements with major heavy machinery manufacturers, we provide everything in-house. By consistently handling precise processes from material cutting to lathe and milling processing, polishing, and welding, we achieve improvements in quality and reductions in delivery times. 【Manufacturing Achievements】 ■ Pins ■ Swing motors ■ Hydraulic multi-control valve components ■ Hydraulic pump components ■ Travel motors ■ Track rollers *For detailed equipment specifications, please download the PDF to view.

• Hydraulic Equipment