LATHE OPERATIONS - OD1645 - LESSON 1/TASK 3
for the lathe lead screws and similar power transmitting uses.
FIGURE 41. ACME, SQUARE, AND 29 WORM
SCREW THREAD FORMS.
(5) Twenty-Nine Degree Worm Screw Thread.
The 29 worm screw thread and
the Acme thread are similar in that they both have an included angle of 29
(figure 41). However, these thread forms should not be confused since they
are different in the depth of thread and in the width of the crest and root.