We propose suitable fastening conditions to our customers based on the screw examination tests!
The proposal of better contract terms is where the true value of a fastener manufacturer is demonstrated! Our company offers a wide range of measuring equipment specifically for fasteners.
At Yamashina, we offer a variety of specialized measuring equipment for fasteners that enables us to propose better fastening conditions. With the support of our excellent senior engineers, who possess extensive testing know-how backed by a long history and the latest technology, we conduct tests and analyze the results to suggest optimal fastening conditions to our customers. 【Test Items】 - Tensile strength (yield and fracture) - Shear strength - Fatigue testing (conducted externally) - Tightening fracture test - Tightening relaxation test - Torque-axial force relationship examination test - Axial force creep confirmation test - Threading rotation speed dependency test - Temperature distribution test during threading - Friction coefficient calculation - Cold and heat testing - Alternating immersion test in saltwater - Salt spray test - Electrical insulation evaluation test - Ground bolt conductivity test - Chip analysis - Vibration test (bolt standalone evaluation) - Plasticity range examination, etc. Please note that the test content may be restricted based on bolt diameter and length. Additionally, costs may be high depending on global requirements and the types of tests. There are also tests not listed above that can be conducted using external testing facilities, and reports can be provided for those as well. Please feel free to consult us, including for cost estimates.
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Established in 1917, during the dawn of mass production of screws in Japan, the company succeeded in producing the first domestic cross-recessed screws in 1949 and cooperated with the government to domesticate tapping screws in 1954. We hold data on over 200,000 types of screws and bolts, enabling us to manufacture a variety of products with high quality. Recently, we have been focusing on research and development investments, working on tapping bolts with a diameter of 6mm or more, high-strength aluminum bolts, tapping screws for thin steel plates, and tapping screws for CFRP, which will support the next generation. We are committed to challenging innovative technology development without being bound by history.