• 螺紋限界牙規

螺紋限界牙規


螺紋用限界牙規為限定相同之規格和等級,其螺紋以通端和止端2個限界方式來做檢查。以前JIS牙規方式其止端因使用的目的分別有工作用和檢查用,ISO方式則無分別。製品之螺紋依規定的嵌合長度,通端規能順利旋轉而通過螺紋的全長,止端規以任何一端檢查須在2回轉以內(ANSI規格為3回轉以內)如超過則該螺紋為檢查不合格,如在規定的回轉數內為合格。


To determine thread standard and class of screw thread limit gauges, threads are tested by the two limit method GO and NO GO system. For the NO GO side there is a specified JIS method and standard, but no ISO classification.

被檢查之螺紋
Screw thread to beinspected

ISO等級之牙規
ISO

以前JIS之牙規
Current JIS

種類
Gauge type

記號
Symbol

種類
Gauge type

記號
Symbol

外螺紋

External thread

有效徑

Pitch

diameter

通端環牙規

GO screw ring gauge


止端環牙規

NO GO screw ring gauge

GR



NR

通端環牙規(工.檢)
GO screw ring gauge


工作用止端環牙規

NO GO screw ring gauge formachinework


檢查用止端環牙規

NO GO screw ring gauge for inspection

GR


WR


IR

外徑

Majordiameter

外徑用通端環規

Plain GO ring gauge for major diameter


外徑用止端環規

Plain NO GO ring gauge

for major diameter


外徑用板形測徑規

Plaincallipergauge

for major diameter

PR通端
PR GO


PR止端

PR NO-GO


PC

工作用限界板形測徑規

Limitsnapgauge

formachinework


檢查用限界板形測徑規

Limit snap gaugefor inspection

WS



IS

內螺紋

Internal thread

有效徑

Pitch

diameter

通端螺紋柱規

GO screw plug gauge


止端螺紋柱規

NO GO screw plug gauge

GP



NP

通端螺紋柱規(工.檢)
GO screw plug gauge


工作用止端螺紋柱規

NO GO screw plug gauge

for machine work


檢查用止端螺紋柱規

NO GO screw plug gauge

for inspection

GP


WP


IP

內徑

Minor

diameter

內徑用柱規

Plain pulg gauge

for minor diameter

PP

工作用限界柱規

Limitpluggauge

formachinework


檢查用限界柱規

Limitpluggauge

for inspection

WM



IM

image157.png

螺紋限界牙規及點檢用牙規之公差相互關係位置說明圖
Mutually related positions of external screw thread and internal screw thread limit gauge and gauge for checking explanation figure.
例M3x0.5 6H, 6g 及JIS Ⅱ
Example M3x0.5 for ISO 6H 6g and current JIS class Ⅱ .

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