square thread การใช้

• Square threads are named after their square geometry.
• Acme threads have a 29?thread angle, which is easier to machine than square threads.
• They are as efficient as square threads in these applications, but are easier to manufacture.
• They are not as efficient as square threads, due to the increased friction induced by the thread angle.
• This shape is easier to machine ( faster cutting, longer tool life ) than is a square thread.
• Square threads also cannot carry as much load as a trapezoidal thread, because the root of the square thread is smaller.
• Square threads also cannot carry as much load as a trapezoidal thread, because the root of the square thread is smaller.
• For square threads, the nut must be replaced; for trapezoidal threads, a split nut may be used to compensate for the wear.
• The "'square thread form "'is a common screw thread form, used in high load applications such as leadscrews and jackscrews.
• The tooth shape also has a wider base which means it is stronger ( thus, the screw can carry a greater load ) than a similarly sized square thread.
• Compared to square threads, disadvantages of the Acme thread form are lower efficiency due to higher friction and some radial load on the nut ( angular offset from square ).
• When created prior to 1895, Acme screw threads were intended to replace square threads and a variety of threads of other forms used chiefly for the purpose of traversing on machines, tools, etc . Acme screw threads are now extensively used for a variety of purposes.