faq
About us
- Do you manufacture needle bearings?
- We are not currently manufacturing needle bearings. We sell shafts, needles, rollers, and shaft and nut assemblies that require special precision.
- Where can I find Sanwa needle bearings?
- We are located at the foot of Mt. Tsukuba in Tsukuba City, Ibaraki Prefecture. We also have a factory in Fuzhou City, Fujian Province. Click here for details
- What certification standards do you hold?
- We are certified with IATF16949, ISO13485, ISO9001, and ISO14001.
- Please tell us about your efforts towards the SDGs.
- We are working to support vaccination of children in developing countries and to reduce carbon dioxide (CO2) emissions. Click here for details
About technology and facilities
- What kinds of materials does TNK handle?
- We mainly handle stainless steel, but also bearing steel, die steel, carbon steel and rare metals.
We also accept orders for processing rare metals such as tungsten, molybdenum, silicon, and various other super-hard materials.Stainless Austenitic SUS201, SUS301, SUS303, SUS304, SUS310, SUS315, SUS316, SUS316L, SUS317
Martensitic SUS410, SUS416, SUS420J2, SUS420F, SUS440C
Ferrite SUS405, SUS410L, SUS430, SUS430L, SUS434Bearing steel SUJ2 Die Steel SKD11 Chromoly steel SCM415, SCM418, SCM420, SCM435, SCM440, SCM445 Carbon steel S40C, S45C, S50C Free-cutting steel SUM21, SUM22, SUM24L - What machinery do you own?
- CLICK HEREPlease check from
- What are the features of TNK?
- In order to handle all kinds of precision metal parts, we have the technology and equipment to handle all types of processing, including cutting, plastic processing, grinding, and heat treatment, and we produce them through integrated processing. We have particular strength in grinding, and with our unique technology and equipment, we have the capacity to mass-produce (several million pieces per month) world-class high-precision parts (0.1 µm precision).
- Can you also make prototypes?
- We help our customers from the concept, planning and development stages of their products. By helping from the product planning and development stage, we can also identify problems that may occur during mass production and propose improvements. Furthermore, we develop dedicated equipment for mass production, and have established a system that allows us to supply products of stable quality at lower prices. Our ability to cooperate from the planning stage through to the end of product life is one of our strengths.
- Can I still order from a remote location?
- We serve the whole country, including overseas.
- Is it possible to process the shaft I am considering?
- CLICK HEREIf you already have drawings or other documents, please attach them to help us respond more quickly.
About your order
- Do you have JIS standard shafts in stock?
- We are sorry, but we can only make products to order according to your design. If you provide us with a drawing, we can manufacture the product.CLICK HERE.
- Is heat treatment possible?
- We have multiple vacuum furnaces, vacuum carburizing furnaces, continuous heat treatment furnaces, etc. in-house. We can select the appropriate heat treatment method according to the shape characteristics and heat treatment that meets the customer's needs. In addition to quenching, carburizing, carbonitriding, and aging treatment are also possible.Please also refer to SVC Processing.Please also refer to ".
- Please tell me the process from inquiry to order.
- CLICK HEREfor further details.