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Thread ring gauges are metrology tools that are used for gauging the outer diameters of pins, shafts, splines, fasteners, dowels, studs, and other machined cylindrical parts. Ojiyas gauges are fabricated from a stable material (SKS31) with a highly precise (extremely high tolerance) bore in their center that functions as the gauge for the outer diameter of the parts. The primary function of ring gauges is to establish on a go/no-go basis whether the part being gaged falls within the dimensional tolerance that was specified for it. The use of ring gauges enables inspections and quality decisions about machined parts to be made very quickly without the need to resort to the use of micrometers, calipers, thickness gauges, or other measurement instruments that could take longer to yield a result.
It important to note that ring gauges are used to quickly establish if a part falls within the accepted tolerances and yields a yes/no condition based on the gaging. It is not a measurement instrument in the sense that it is not providing an actual value of the part’s diameter – it simply gages whether the part falls within permissible limits and therefore can be accepted from a quality control perspective.
Ojiyas limit gauges for screw threads are provided in the same class as the standard screws. The GO and NO-GO limit gauges are used to check the accuracy of the threads. The workpieces are inspected to ensure they are within the upper and lower limit of deviations and tolerances.
Ojiyas screw threads limit gauges are used corresponding to the various screws such as metric screw, bicycle screw, uniﬁed screw, sewing machine screw, etc. The limit gauges are segmented into ISO-based JIS and conventional JIS (for inspection and production use). According to JIS, outside diameter of the male screws are measured using plain ring gauge or snap gauge and inside diameter of female screws are measured using plain plug gauge. By using such gauges, the complex element of the screw can be inspected easily and quickly. Therefore, such gauges are effective in controlling the quality of the workpieces in mass-production line.
Ojiyas (Ojiya Seiki Co., Ltd.) manufactures high quality thread gauge, measuring gauges and various inspection jigs. The company pursues a high level of precision manufacturing technologies and measurements to produce high quality products. Ojiyas products are widely used in various industries – automotive, aerospace, bicycle etc.
Ojiyas gauges undergo heat treatment to attain maximum hardness and increase its resistance to corrosion.
Sub-zero treatment of gauges changes the phase structure and improves the gauge’s quality and performance. Ojiyas gauges undergoes professional sub-zero treatment for better wear resistance & dimensional stability.
Ojiyas also produces a wide range of gauges, click below to view their other products:
You can find out more about the complete Ojiyas range of products by viewing the Ojiyas Catalog on our support page.
LFC is the authorized distributor for Ojiyas in Singapore and Indonesia. Contact us if you wish to discuss your gauging applications further.
Ojiyas Screw Threads
Parallel Thread Specifications
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