Thread Inspection & Thread Detection of Internal Threads
Internal thread checking employs three types of probes:
These probes have the same tolerance as standard thread gages. Included with the probe is a short form certification that guarantees the probe is within the tolerance of a known standard. For nominal extra cost, ask for the long form certification that includes measured values. New Vista can modify a customer’s existing thread member, or can supply new. If New Vista supplies, we will include a detail print with the probe, so the customer can supply the probe himself in the future if desired. Probe life is variable, dependant on part material, and the presence of lubricant. Under ideal circumstances, probe life of 1 million cycles is possible, but some fraction of that is more likely. A rule of thumb estimate is 150,000 cycles. Ask for TiN coating to increase probe life by up to 7 times. The probe shank is either straight (fig. 1),
for fitting in a collet, or of a quick-change hex design (fig. 2)
that requires no tools. The straight design is standard. New Vista also designs and manufactures special
probes (below)
for unusual applications. |
Combination
GO-NO GO probes (image to right) are for doing GO and NO GO checking
in one spindle. The first portion of the probe is GO, the second
portion is NO GO. A good thread will allow the GO portion of the
probe to enter, but will not allow the NO GO portion to enter. 
