Bearing Staking and Swaging
- Evan Li
| Staking | Swaging |
|---|---|---|
Machinery requirement | Hydraulic press/arbor press at least 75 000N force | drill press |
Tool cost | Less expensive | More expensive |
limitation | Can damage PTFE lining, or cause bearing wall to deform | Hard to preform, require more practice to get right. Could destroy v-groove if done incorrectly |
According to ChatGPT Mar 14 Version
Staking is the process of using a punch or similar tool to deform the metal around the bearing to hold it in place. The punch is typically applied around the circumference of the bearing at specific points, causing the metal to protrude into the raceways of the bearing, securing it in place.
Swaging, on the other hand, involves using a machine to apply pressure or force to the bearing, causing it to expand and lock into place. This method is often used with split or self-locking bearings that have been designed to expand during the swaging process.
Advantages of staking:
Staking is a simple and low-cost method that can be done with basic tools.
It is an effective way of retaining bearings that are not designed for swaging.
Staking is a permanent process that creates a secure and rigid connection between the bearing and the housing or shaft.
Disadvantages of staking:
If not done properly, staking can damage the bearing or the surrounding material.
The staking process can also cause stress points that could lead to premature bearing failure.
Staked bearings cannot be easily replaced, making maintenance more difficult.
Advantages of swaging:
Swaging is a quick and efficient process that can be done with a machine, making it ideal for mass production.
The process is less likely to damage the bearing or surrounding material than staking.
Swaged bearings can often be easily replaced, making maintenance simpler.
Disadvantages of swaging:
Swaging requires a specialized machine and operator, making it more expensive than staking.
The process may not be suitable for all types of bearings, particularly those that are not designed for swaging.
Swaging may not provide as secure a connection as staking, particularly in high-stress applications.
Resources
U-Roller Swaging Tool | Aerospace Bearing Tools | Carter
Alternatively:
A much simpler bearing retention method is with a bolted plate on the bearing housing when space is not a concern.