Cylindrical Ring Gages

Thread Check Inc. offers a full range of plain cylindrical ring gages designed to be used for go/no go gaging and as masters. Plain cylindrical ring gauges are ideal for inspecting outside diameters of manufactured parts. With go/no go ring gages, an inspector can quickly pass or fail parts without taking time consuming readings from a measuring instrument. Go ring gauges are built with a minus tolerance. No go ring gages are built with a plus tolerance. The go gage is used to verify the high limit. The no go gage is used to verify the lower limit. Fixed limit gages such as plain cylindrical ring gauges are made to match the maximum and minimum material condition of the part. The fixed limit gage is typically a three dimensional replica of the mating part. This system of gage tolerancing ensures that an inspector will never allow bad part to be accepted. Inspection using fixed limit go/no go plain cylindrical ring gages requires only basic training. The inspector only has to verify whether the gage is fitting over the outside diameter of their part.

Plain cylindrical ring gages are also used for mastering measuring instruments. Plain cylindrical ring gauges are used to set electronic bore gages, air gages, internal micrometers and length measuring instruments. Setting or master gages are typically used to set a measuring instrument to a known value or zero position. By using the same size master ring gages, lead error on measurements can be eliminated.

Plain cylindrical ring gauges are used to check outside diameters of parts as well as for mastering measuring instruments. Plain ring gages are used to set electronic bore gages, air gages, internal micrometers and length measuring instruments. Plain ring gauges are ideal for gaging the outside diameter of parts. The go ring gage is used to verify the high limit of the part and the no go plain ring gauge is used to verify the low limit of the part.

Ring gauges are available in class XX thru class ZZ gagemaker tolerances. Class XXX tolerance ring gages are priced on request. Roundness and taper does not exceed 50% of the gagemakers tolerance. Thread Check can supply ring gauges from .015” up to 28.00” in diameter. The No Go ring gage is distinguished from the Go ring by an annular groove cut into the outside surface. Both ring gauges are also marked with size, type and gagemaker tolerance. The outside diameter of a plain cylindrical ring gage is knurled for easy handling and gripping. All plain cylindrical ring gauges are manufactured to ASME/ANSI B47.1 and ASME/ANSI B89.1.6. Plain ring gages up to 1.510”are manufactured without a flanged outer diameter. For ring gauges larger than 1.510”, the gages have a flanged diameter. The gage has less material on the outside of the diameter thus making it easier to handle and use by the inspector. Cylindrical plain ring gages manufactured in carbide use a solid carbide ring gauge jacketed with a steel outside sleeve. The jacketed steel sleeve reduces the weight and protects the carbide insert which is hard and brittle.

Cylindrical ring gages are available in quality tool steel, chrome, carbide and ceramic materials. Thread Check can also supply cylindrical ring gauges with special radiuses and chamfers to allow easy entry onto parts. Extra length and special keyway ring gages are priced on request.

Thread Check’s expert sales engineers can assist you in selecting cylindrical ring gauges for your applications.