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美国螺纹指示规
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Variable Thread Gages

SYSTEM 21
System 21 provides for interchangeable assembly with respect to functional size only. Functional size must be measured at the maximum material limit within the length of standard gaging elements. The characteristic known as NO GO functional diameter must also be verified. This can be accomplished by using fixed limit gaging or variable gaging with functional elements.

SYSTEM 21A (FOR METRIC THREADS IN ACCORDANCE WITH ANSI B1.18M)
System 21A provides for interchangeable assembly with functional size verified at the maximum material limit using standard length gaging elements. This can be accomplished using fixed limit gaging or variable gaging with functional elements. System 21A also states that the minimum material limit (minimum pitch diameter) must be verified by inspecting two thread flank locations over the length of the thread. This can be accomplished by using variable gaging or thread roll snap gages with pitch diameter elements.

SYSTEM 22
System 22 provides for the interchangeable assembly with functional size verified at the maximum material limit using standard length gaging elements. This can be accomplished using fixed limit gaging or variable gaging with functional diameter elements. System 22 also states that the minimum material limit (minimum pitch diameter) must be verified over the full length of the thread. This can be accomplished using variable gaging with pitch diameter elements.

SYSTEM 23
System 23 provides for interchangeable assembly with functional size verified at the maximum material limit using standard length gaging elements and minimum material limit (minimum pitch diameter) must be verified over the full length of the thread. The gaging requirements for SYSTEM 22 would also apply here but in SYSTEM 23 other thread characteristics such as lead, flank angles, taper and roundness must have to be independently verified. Only thread characteristics, which are specified, will have to be inspected for SYSTEM 23 compliance.

Gages


美国GSG公司是1995年有美国最大量规公司和美国最老的量规公司合并而成的。1999年,GSG成立了42000公尺的新厂房,其中包括了5000公尺的具有恒温和湿度的实验室和一系列有CNC螺纹磨床的自动化生产流水线。2001年,GSG引进了新的客户服务系统和开始生产光面塞规。今天,GSG是美国量规产品最为齐全的量规制造商,并一直是质量的领先者。同时, GSG也是世界上为数不多的石油专用螺纹量规的生产者之一。GSG具有生产API规范5B,规范7和规范11B的石油螺纹量规的生产证书。

美国GSG能生产的API石油专用螺纹量规Extreme Line CasingTubing – Integral JonitMining: BECO; DI-22, DI-42等,GSG在医疗行业里是设计和制造可调式和固定式量规的绝对领先者。GSG为医疗和整形外科制造行业提供大量的量规解决方案。GSG主要提供医疗量规,锥度螺纹规、圆筒形锥度螺纹规、可调式螺纹量规、多头圆柱形的内外螺纹规、固定式螺纹量规、setting Master、小尺寸氮化碳涂层量规等,欢迎前来咨询。

    GSG 是非标Special Gage的领导者,专业生产各类非标量规,尤其是在锥度螺纹、ACME MOD系列、多头非标尺寸量规等,期待您的咨询。

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