Threaded fasteners and powers screws examples

1. Fasteners, Powers Screws

2. Example 1

3. Example 2

4. Example 2

5. Example 3

6. Example 2
Two machine parts are fastened together tightly by means of a 24 mm tap bolt. If the load
tending to separate these parts is neglected, find the stress that is set up in the bolt by the
initial tightening.

7. Example 5: An eye bolt is to be used for lifting a load of 60 kN. Find the nominal
diameter of the bolt, if the tensile stress is not to exceed 100 MPa. Assume coarse
threads.
Solution. Given : P = 60 kN = 60 × 103 N ; s= 100 MPa =
100 N/mm2 An eye bolt for lifting a load is shown in
Fig. Let d = Nominal diameter of the bolt, and dc = Core
diameter of the bolt. We know that load on the bolt (P),