O rotate the part two or more times until the part has been rotated 360 degrees.
Tri roll thread gage.
One single gage can be used to inspect pre plate after plate class 1 1a 2 2a 3 and 3a eliminating the need for multiple fixed limit thread ring gages.
Measuring the minimum material 1 pitch or groove diameter o open rolls and place part between rolls near the point above the lead threads within the rolls.
Tri roll gages for both single size thread inspection and range adjustable applications.
The aluminum body makes large gage rings light weight and easier to use.
Others have attempted to provide an indicating gage using thread rolls or thread segments for tapered threads.
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.
Johnson gage thread inspection systems consistently meet and exceed today s requirements.
O rotate part slightly and observe the reading.
The rigid construction and constant measuring pressure of our tri roll thread comparators provide consistent and accurate readings.
Tri roll thread gage usage practices 9 tri roll gage.
Judge tool gage inc.
For example the johnson gage company offers a tri roll type indicating thread comparator.
However this indicating gage is deficient insofar as it is incapable of gaging a threaded product at more than one circumferential position.
If you wish to do.
Shop our tri roll external thread gage comparators.
This can be accomplished by using variable gaging or thread roll snap gages with pitch diameter elements.
Thread inspection systems from johnson gage.
If you wish to record your results electronically you can connect your tri roll gage to a printer processor dp1 vr with the correct connecting cable cc 905388.
The helix path of the thread along the line of adjustment remains true and in alignment throughout the life of the gage.
The gsg southern style thread ring features the unique automatic helical adjustment.
Tri roll external thread gage operating procedure 817 870 8888 817 870 9199 usa page 8 of 15 june 6 2007 5.
Has been chosen by professionals as their primary source for precision measurement calibration and inspection solutions for more than 60 years.
Proven in countless demanding manufacturing and inspection applications from automotive to medical to aerospace johnson gage thread inspection systems assure complete dimensional conformance of the essential.
