Vibration motor PCB mounting guide from Precision Microdrives. Link here
There are many methods for mounting a vibration motor to a Printed Circuit Board (PCB), each with their own advantages and disadvantages. Some techniques are specific to different types of motor.
This guide will help you evaluate different mounting methods and perhaps introduce some options you had not considered. The different mounting techniques are split into four main groups, and each discussed in turn:
Glue and Adhesive Methods
Fasteners and Clips
Injection Moulded Mounts