The acme threads are special kinds of threads which have a perfect angle of 29 degrees and their heath equals to half the height of the pitch. Further, the apex and the valley of these kinds of threads are particularly flat. These threads are better in comparison to the square threads because they have a shape which provides easy machining ability. Further, they provide a cutting speed faster than the square threads and the tool life is also enhanced in these threads. The strength of these threads is indicated by the width of the tooth shape. This also indicates that these threads are able to carry loads of heavier weights as compared with the square threads. A split nut could also be used with these, which is not possible to use with the square threads.
For machines which are larger than 12 inches, and for those machines which are designed to carry large amounts of loads, only acme threads are preferable as they have all the capabilities of performing better in such circumstances. You can also go for stub acme threads but the standard Acme Thread are more preferred. If you are going to make a long term investment, do not spend on anything other than acme threads.
Acme threads do not wear out soon. Hence, if you invest in them once, you can be sure that they would last for at least some years. Also, they have better load bearing capabilities and more tolerance power than all the other kinds of threads in the race. The thickness and width of these threads also allows them to perform better in those environments which have a lot of dirt and debris gathered.
What are the Various Uses of Acme Threading?
In some special designs, acme threads are used particularly. This is due to the reason that the acme threads are of exact measure without any deviation. And, it leads to a coordination between user and the manufacturer. These are used in applications where there is no room for even a slight deviation from the specified angle, for example, in aircraft wing flaps, in hydraulic actuators or car jacks.
Acme threads and lead screws go hand in hand. This is because the acme threads are much more broad and strong as compared with the V shaped threads. Hence, power transmission with these kinds of threads is particularly easy. And, since they can carry higher amount of load, even the heavy power transmission would not pose a risk. Another good point to mention here is that they are widely available in the Unites States. Acme nuts are also available readily while the worm nuts need to be searched a lot.
Acme threads also find application in CNC drive systems and they have proven to perform better than the stub acme threads, worm threads and ISO Metric threads.