
●Company Profile
[Headquarters] 1001 Monju, Motosu City, Gifu Prefecture, Japan
[Type of business] Turning of the outer and inner rings of bearings
[H P] https://chubuseiko.co.jp/
Chubu Seiko Co., Ltd. (Motosu City, Gifu Prefecture, Japan) is a parts manufacturer that processes the inner and outer rings of bearings, which are precision parts.
They specialize in small to medium-sized sizes, and provide stable quality products by processing everything from forging to turning.
Utilizing the know-how of mass production technology for bearings accumulated over 60 years since their founding, they have put their strength in high-precision turning processing, from standard products used in many places to high-value-added products used in special technologies.
They used to use single-purpose machines for the turning processes, but they decided to install CNC lathe for next step, so they purchased our parallel 2-spindle CNC chucker "MW120II."
We interviewed this customer when they came to our Inuyama factory for machine pre-acceptance test.
Muratec
Could you tell us what made you consider installing CNC lathe?
In addition to our existing mass-production jobs, we have been receiving an increasing number of small-lot orders, which has expanded the scope of our work and served as the main reason for this change. With our current single-purpose machine line, changeover job requires a significant amount of setup work and manpower. So we thought that installing CNC lathe would simplify the setup process and enable us to switch workpieces quickly.

Chubu Seiko Department Manager
Mr. Kuzuya
Muratec
By changing the machine type from the previous ones, did you have any concerns about processing and operation?
The biggest concern for me was the processing aspect.
I was worried about what the result would be when I changed from the special formed insert I had been using to the standard type insert.
Some of our operators cared about shape accuracy and machining stability.There were also operators who were concerned about the condition of the cutting chips.

Chubu Seiko Department Manager
Mr. Kuzuya
Muratec
While you have many concerns about CNC lathes, what made you to decide Muratec products?
We were able to fully verify the machine in advance through test cutting by using the actual machine. Seeing the cutting accuracy and chip disposal with our own eyes gave us the greatest assurance.
In addition, hearing positive reviews from companies we know that uses Muratec machines, saying that it is a good machine that continues to operate without stopping, also helped us to make our decision.

Chubu Seiko Department Manager
Mr. Kuzuya
From an operator's point of view, I had never touched a CNC lathe, so I was very worried about
the operation and was curious about what the follow-up system would be like.
I heard that Muratec can make operational guidances at the test cutting and at the time of delivery, so I am relieved about this point as well.

Chubu Seiko Section Chief Mr, Tanaka
Muratec
What is your impression of Muratec products?
I saw the actual machine for the first time at the test cutting, and I was surprised that the size of the machine was more compact than I had imagined.
In addition, although the machine itself is compact, the transferring space of the gantry loader is sufficiently secured both inside and outside the machine, so it was stable even when driving at high speeds.

Chubu Seiko Section Chief Mr, Tanaka
Muratec
Final question, could you please tell us about your future prospects and challenges?
In the future, we would like to expand the range from mass-production parts to high-mix, low-volume production.
In fact, we feel that the demands for high-mix, low-volume production is increasing from customers, and flexible responses are becoming required.
Also, the trend of bearings has changed from small diameters to large diameters and thin shapes, so we would like to incorporate sizes and shapes that have been difficult with single-purpose machines into NC, and aim to be a company that can do work with added value.

Chubu Seiko Department Manager
Mr. Kuzuya
ーFinally
This time, we interviewed Chubu Seiko Co., Ltd.
Thank you very much for taking time for us and your continued supports.
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