I hope, this will be useful for you
Create cylinder with suitable dimensions.
Create hole of desired dimension on front plane.
Your part should look like shown!
Now, Select hole from model tree & click on pattern tool.
Select AXIS type & click on axis A_1
Enter no. of pattern & angle to match the illustration.
On dimension tab, click on direction 1 & select the dimension (1)
Change the dimension to (0.7) & finish the command.
Congratulations! Here you have successfully created helical pattern of holes on on cylinder.