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Latest update: 30/05/2017 17:53:24

Takezawa Seiki Co., Ltd.

Our diamond reamer prolongs the operating life of tools with 0.5 μm-accuracy of circularity.

We now manufacture our own independent diamond reamer products, honing machines, and other large-scale components. Our diamond reamers facilitate finishing processing with difficult-to-cut materials such as cast iron. Their characteristics include 0.5-μm circularity, 0.5-s surface roughness, excellent wear resistance, and four times the durability of ordinary grindstones.

Main image

Other presentation

[Company strength]
(1) We have independently developed and branded a diamond reamer. We have many regular customers including major companies.  
(2) We can make use of our accumulation of processing experience know-how as a strength in solving customer problems and in making proposals to our customers. 
(3) We have human resources with know-how on transactions with overseas companies and sufficient language abilities. 

[Business description]
(1) We develop, manufacture, and sell diamond reamers.
(2) We develop, manufacture, and sell honing machines.
(3) We have an integrated large parts manufacturing system consisting of materials procurement, canning, annealing, mechanical processing, and coating.
We manufacture diamond reamers for inner-diameter finishing of automobile components and construction machine components on a custom-made basis from the design stage. 

High-precision mechanical parts processing

[Strength of products/technologies]
(1) We can complete the finishing process of our diamond reamers in one round trip (one pass). This finishing process is also applicable to difficult-to-machine materials such as cast iron and chrome-molybdenum steel.
(2) Our diamond reamer’s accuracy is 0.5 μm in circularity, and 0.5 s in surface roughness. We can reduce costs by shortening lead times. 
(3) Our diamond reamer has superb durability, which is four times greater than ordinary grindstones, and it has a long operating life.
(4) We can perform any kind of design and manufacturing according to your request. We can support any specifications. 

[Representative's message]
We have been consistently installing industrial machinery and manufacturing components since our foundation in 1962. We are proud of having kept up the challenge to find solutions for various customer issues. We think our company has a duty to carry out manufacturing with consideration for the global environment as well as globalization. From this point of view, we hope to strongly back up our customers, and continue to take on challenges with them in order to seek solutions.

[Company structure for market development/overseas expansion]
We have assigned dedicated staff for new transactions in the sales engineering department. They will work as the point of contact for major companies and overseas companies. 
Staff in the engineering department and design department will respond to technical inquiries. If necessary, they will visit the customer directly in order to resolve issues.
Our president directs support for inquiries from new customers. We will also sincerely respond to overseas customers. This includes the collection and management of information.

[Market share/Ranking]
Diamond reamers: 94% share of the domestic market in Japan; 6% share of the overseas market.

[Awards and media coverage]


(1) Tochigi Prefecture, Frontier Company.
(2) HITACHI Excellent Quality Assurance recognition.

[Factory (domestic)]

[Other sites]
Headquarters, Tochigi

[Exhibition History/Information]
Monozukuri Craftsmanship Company Exhibition; Business Meeting at Marronnier Plaza; Joyo Technology and Business Meeting at Tsukuba International Congress Center; METALEX Thailand, in 2010, 2011, and 2012; Monozukuri Craftsmanship Business Meeting in Bangkok 2014, Factory Network Asia (scheduled).

This company is recommended by the following support organizations.

Kanto Head Office, SMRJ