Reference Gauge
Thread Gauges เกจวัดเกลียว
[Limit gauges for parallel screw threads]
[Standard thread gauges]
A standard thread gauge comprises a thread plug gauge and a thread ring gauge, which are manufactured extremely closely to a basic profile, and fit each other precisely. Although sometimes used as the go-end of a limit gauge, when threaded product pairs that are to be inspected need to precisely fit, we recommend a limit system that makes assessments using go and no-go thread gauges. Caution when using For standard threas gauges, the thread plug gauge also acts as the thread gauge for checking fit. It using thread ring gauges, which are not compatible with thread plug, gauges, each product cannot be inserted even if passed by both gauges and may not plug gauge, please inform us when ordering a thread ring gauge.
A limit system is generally used for carrying out pass/fail decisions for parallel threads by using a thread gauge. Inspections are conducted using a go/no-go gauge to determine whether a product passes or fails, thereby guaranteeing precision. There are two types of gauges for metric theads : the current JIS gauges classiffied by the ISO (6g, 6H, etc.) and the old JIS grade 1, 2 and 3 gauges. Please specify the type you want when ordering. Differences listed below 1. GO and NOT GO of the ISO gauge system is made with same dimentions for both inspection and working 2. Pass/Fail assessment of a NOT GO gauge for the ISO class gauge system has been set as not to be screwed in more than two revolutions. For class 1, 2, 3 gauge system it is not to be screwed in more than two revolutions, included two revolutions. 3. For the ISO class gauge system, the thread gauge for check fitting of the thread ring gauge is the GO and NOT GO limit type.
[Standard thread gauges]
Gauging system for ISO class
Gauging system for ISO class 1, 2, 3
Gauge symbol
Gauge symbol
Gauge type
Division
Gauge type
GO thead ring gauge
GO thead ring gauge
GR
GR
Limit gauge for external screw thread Limit gauge for internal screw thread
NR NOT GO thead ring gauge for machine working
NOT GO thead ring gauge for Inspection WR•IR
NOT GO thead ring gauge Ring gauge for major diameter Snap gauge for major diameter GO thead plug gauge NOT GO thead plug gauge Plug gauge for major diameter
PR
PC Limit snap gauge for machine working Limit snap gauge for Inspection
WS•IS
GO thead plug gauge
GP
GP
NP NOT GO thead ring gauge for machine working PP Limit snap gauge for working
NOT GO thead ring gauge for Inspection WP•IP
Limit plug gauge for Inspection
WM•IM
GO check plug for GO thead ring gauge GRGF Thread plug gauge for checking fit of GO side
GF
NOT GO check plug for GO thead ring gauge Wear check plug for GO thead ring gauge GO check plug for new NOT GO thead ring gauge NOT GO check plug for NOT GO thead ring gauge Wear check plug for NOT GO thead ring gaug
GRNF
GW Thread plug gauge for checking wear of GO side
GW
Checking gauge for limit gauge
Thread plug gauge for checking fit of NOT GO side for working
Thread plug gauge for checking fit of NOT GO side for Inspection
WF•IF
NRGF NRNF
NW
JSR Entech Catalogue 252
jet@jet.co.th
jetco@jet.co.th
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