Total solution - from making the perfect thread to ensuring that proper tolerances are met.
High precision measurement tools manufactured with the same advance technology we use for our world-renowned taps.
Every aspects of our production - from grinding technology to anti-aging heat treatment know-how, is designed to provide the highest quality product possible with unbeatable reliability.
OSG offers thread gauge inspection via our web system as well as thread gauge calibration services.
Thread Gauge Inspection Sheet
The thread gauge inspection sheet can be easily downloaded for use. The file is exported as a PDF for system and environmentally friendly data management.
Thread Gauge Calibration
OSG offers thread gauge calibration services at a fee. When specifications are clear, thread gauges from other manufacturers can be calibrated as well. Contact us for details.
Thread Limit Gauge (LG): Plug
Used to inspect female thread. The passing side and stopping side make up a single set. The thread is considered to be acceptable if the passing side passes with ease and the stopping side does not cut in after two rotations. This gauge is also used to inspect the whitworth screw.
Thread Limit Gauge (LG): Ring
Used to inspect male thread. The passing side and stopping side make up a single set. The thread is considered to be acceptable if the passing side passes with ease and the stopping side does not cut in after two rotations. This gauge is also used to inspect the whitworth screw.
Taper Pipe Thread Gauge (TG)
Used to inspect taper pipe threads (R・PT). There is a notch on the side, and if the end of the screw is within the scope of the notch, it is a pass. This indicates the point of standard dimensions in the ANSI (NPT/NPTF), and there are 3-4 stage notches are installed.
Standard Thread Gauge (SG)
A gauge created in accordance with the basic profile of screws and standard dimensions. A plug gauge and ring gauge that fits one another perfectly comprises a single set. Can be used as a standard gauge (master gauge) and can also conduct inspection by directly using it on a male or female thread.
Plain Limit Gauge (PG, RG)
Also known as plug gauge. A gauge used to measure dimension of hole or axis. A type for inspection and construction exist. Ring gauges are custom made.
Friction Inspection Thread Gauge (LCG)
Gauge used to inspect the thread limit ring gauge (LG). Inspects whether or not ring gauge has exceeded the stipulated friction limit.
Standard Gauges (PG-M,RG-M)
Also known as the master gauge, it is used to set the dimension and serve as a standard for dimension for managing inspection of gauges and comparative measuring equipment (measuring equipment using cylinder gauge, micro indicator, atmosphere micrometer, dial gauge). Plug gauges (PG-M) are customized orders.
Custom gauges are available for straight angle, deep-hole, etc. Contact your nearest OSG sales office for details.