GUIDES
FUNDAMENTALS OF
DRILLING & TAPPING
ON SALE NOW
FUNDAMENTALS
OF THREADING ON A LATHE
ON SALE NOW
FUNDAMENTALS OF
WORKING BETWEEN CENTERS
ON SALE NOW
FUNDAMENTALS
OF MILLING
COMING SOON
FUNDAMENTALS
OF SAWING
COMING SOON
METALWORKING
SHOP TERMS
COMING SOON
MEASURING THE PITCH OF THREADS:
The pitch or the diameter of a threaded part must often be measured with close accuracy. Anyone of several methods and tools can be used. A machinist's rule or a screw pitch gage is convenient for determining the pitch of any thread Figure 1 shows the use of both to measure the number of threads per inch of screw. When measuring threads per inch with a rule, do not count the thread at the end of the rule. The screw illustrated has 8 threads per inch. The screw pitch gage is simply a number of steel blades notched to fit several different pitches of screws. Find one that will exactly fit the threads of a given screw and read the pitch direct from the gage.
Figure 1 Two methods of measuring pitch of screw