![]() Morse Tapers come in eight sizes identified by number between 0 and 7. The MORSE TAPER Tanged Ring Gages are used to check male tanged type tapers, IE.Drilling Machine Spindles, drill Sockets. The MORSE TAPER Tanged Plug Gages are used to check female tanged type tapers, IE.The MORSE TAPER Plain Ring Gages are used to check external tapers of components, IE., Machine Spindle Tapers, Socket Tapers.The MORSE TAPER Plain Gages are used to check female tapers of components, IE.Rough ground and kept for a long period of time before finishing is given this is done to prevent any distortions and ensure stability through their use.Fine lapped to get maximum seating and surface finish.Heat treated and, hardened to 58-60 HRC, to provide a high degree of wear resistance.The Morse Taper Gages, both Plug and Ring type are made of superior quality high Carbon Chrome alloy Steel.For example a Jarno #7 measures 0.875" (7/8) across the big end. The diameter of the big end in inches is always the taper size divided by 8, the small end is always the taper size divided by 10 and the length is the taper size divided by 2. Jarno tapers range from a Number 2 to a Number 20. All Standard Tapers manufactured to ASME/ANSI B5.10 class Z unless otherwise specifie. The proper ordering procedure is to order a PLUG to the standard and a “check ring” to check the plug for wear, and vise versa the RING to the plug. The machine taper ID is made with a decreasing taper, while the tool holder’s OD is made with an increasing taper. ![]() If you order a taper ring and plug gage to the ANSI standard they will not blue to each other. These standards were written for the machine tool builder and tool holder manufacturer, not the gage manufacturer or the customer trying to measure machine tapers. The ANSI standard on Machine Tapers can be a bit confusing to the average user. We use specially modified equipment for grinding and measuring a taper. WESTport Gage manufactures cylindrical taper gages to meet your gaging needs. View WESTports selection of Cylindrical Taper Gages
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