Machine Shop 2
 Lathe Operations - Project 2-1
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Lathe Operations - Project 2-1
Cutting External Threads

Part # PSN2#1

Part Description: O. D. Threading

Quantity Req.: 1

 Name _________________________

Date: ________________

PLEASE HAVE INSTRUCTOR INITIAL AND DATE  GREY BOXES (*), AFTER REQUIRED OPERATIONS
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Step# Location  Description  Initials  Date
10 Lathe Setup part between centers using a dead center in the tailstock. Make sure to use the proper lubricant on the dead center.
20 Lathe  Check lathe setup for runout and taper.
30 Lathe  Setup lathe to cut the first thread. Be ready to answer questions concerning half nut lever engagement.
40 Instructor Have instructor check setup *  
50 Lathe Take a light scratch cut. Insure that the pitch is correct.
60 Lathe Take rough thread cutting passes until you are within 0.010 of finish size. Check pitch diameter using pitch micrometers or other thread measuring instrument.
70 Lathe Take finish cuts of 0.001-0.002 until the gage or pitch micrometer indicates a class 3 fit.
80 Lathe Continue prior procedures for the rest of the threads. Use a split nut when clamping on the finished thread end.
90 Lathe Deburr thread crests and starts. If filing thread crest be careful not to take too much off.
100 Lathe Inspect part and turn in for grading. *