Porsche Ball Bearing Cage - Lingo To Know

Porsche ball bearings are important components of these luxury cars because they work to help the tire efficiently function during a ride. When these components wear out, all you need to do is have them replaced right away. Did you ever know that in the world of ball bearings, there is such a thing as a Porsche ball bearing cage? Find out more about what the cage is about and all other terms related to it.

Ball Bearing Cage

Otherwise known as the ball separator or the ball bearing retainer, the ball bearing cage is a component that helps separate balls in a ball bearing while also helping maintain symmetrical radial spacing in them. They also hold ball bearings together. Basically, these components are used in providing lubrication to the ball bearings. It can act as storage for oils or lubricating fluids. Choosing an appropriate cage from a list of OEM Porsche parts is important in order to make the bearing last for its entire lifetime.

Ball Pocket

This is the part of cage that is found surrounding the ball. It helps position the ball so that it can function accordingly. There is a set diametric clearance between ball pockets and the ball. For instrument and miniature bearings, the clearance is set at thirty five ten thousandths of an inch while for larger bearings, bearings are at ten thousandths of an inch. When ball bearing cages are properly designed, the ball will come in contact with the ball pocket on the ball's pitch circle. Any contact made below or above the pitch circle will result to the cage hanging up and experiencing torque spikes.

Coined Ball Pocket

A coined ball pocket is created when an oversized ball found in ball bearing retainers with metallic crowns is drawn through a part called the blank ball pocket in order to come up with the spherical surface within which balls are made to contact. In this case, the retainer or cage is hardened so that it can easily be snapped to the bearing leaving the tabs and ears with minimal deformation.


Also known as tabs, these are protrusions found on the male half of a ribbon retainer in two-piece steel ribbon retainers. The ears are clinched over the female part in order to hold the ribbon retainers closely and safely together.

Loose Clinch

This is the way by which ribbon retainers must be clinched together in order to allow the balls to orient the two halves found in a retainer. Also known as crimp, this is able to provide lesser noise as well as lower starting and runner torque.


Especially found in crown-type retainers, this part is the opening within which the ball passes through in a bearing assembly. The slot is the first part of the assembly that the ball gets through with before it enters the ball pocket.

Now that you have come to know more about the ball bearing cage, it will be fairly easy to know when you should need to replace a part or the entire retainer. Get to know them better through our help.