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I bought some second-hand Crank Bros Eggbeater pedals. They came in the original box, apparently with all the bits except the cleats. (That's fine. CB cleats are effectively a consumable.)

One of the bits is a pair of plastic pieces I don't recognize. Please enjoy these ASCII drawings:

  ___     ,     ,       ___
 / _ \    |__   |__    /   \
( (_) )   |▓▓   |__   (  *  )
 \___/    |     |      \___/
 Front   Side   Side    Back
               Cutaway

Each piece is a plastic disc with a knurled edge. From the disc, a ring is extruded, with threading on the outside of the ring. The ring's inner diameter is 10mm, and the outside is ~13.5mm. The outside diameter seems to be the same as a pedal spindle diameter, but the threading has a different pitch. There's also a very small hole through the centre of the disc, so it can't be used to seal anything.

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Without a picture it sounds like the grease port tool

grease gun and port tool

This picture was found in this article on rebuilding eggbeater pedals.

The Crank Brothers Eggbeater pedals, however, require periodic lubrication. A maintenance interval of once per season seems to be the general consensus.

As the Eggbeaters come with a grease port attachment, I purchased a grease gun

Evidently Eggbeater supplies the fitting but someone there does not recommend using it.

It seems like a painless, 5-minute job: remove dust cap; install grease port attachment; squirt in new grease, wipe off the old grease (pushed out from the seals on the inboard side); reinstall dust cap; and you are done.

Call me anal, but I decided to double-check with the manufacturer — and I am glad I did:

Hello,

Thank you for your e-mail. ...we would suggest not using the grease port. We would rather you take the spindle out and grease it like that. Just unscrew the endcap and take the nut off - then pull the spindle out and re-grease.

Hopefully this helps,

Thanks

Anka Martin
[email protected]
Customer Service

www.crankbrothers.com

Here is another article with slightly better pictures.
grease gun, cleats, shims, and grease port tool

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    Thanks! That's definitely the part in those pictures. And the "Hey, we gave this to you, but don't use it" official guidance is probably why the CB pedals I had bought (new) in the past did not come with the grease port.
    – Michael come lately
    Commented Mar 11, 2021 at 20:05
  • Speedplay pedals used a grease port, and at first, you had to pry off the endcaps and push in a grease gun fitting that you had to buy. Later, they added a screw and a hole to the standard endcaps. In my experience, this never worked great, grease was squirting everywhere including back towards the user, and it was a lot of grease. In retrospect, it was better to disassemble the pedals and clean them. However, SP bonded the pedal nut to the pedal, which you needed a soldering iron to undo. Anyway, it looks like CB went the right way.
    – Weiwen Ng
    Commented Oct 5, 2023 at 14:40

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