diff --git a/parts/bearings/README.md b/parts/bearings/README.md
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--- a/parts/bearings/README.md
+++ b/parts/bearings/README.md
@@ -1,5 +1,6 @@
 A collection of bearings based around part 168.  A variety of diffent
 toothed discs are available allowing for both 16 and 38 DP drives.
+Most of these require a Ball Cage (part 168c) to operate.
 
 Image | Description | By
 ----- | ----------- | --
@@ -10,4 +11,3 @@ Image | Description | By
 [<img src="images/part-168-with16DP-68T.png" width="100">](stl/part-168-with16DP-68T.stl) | Part 168 with 16DP 68T | Grendel
 [<img src="images/part-168-with38DP-171-Tooth-raft.png" width="100">](stl/part-168-with38DP-171-Tooth-raft.stl) | Part 168 with 38DP 171 tooth raft | Grendel
 [<img src="images/part-168-with38DP-171-Tooth.png" width="100">](stl/part-168-with38DP-171-Tooth.stl) | Part 168 with 38DP 171 tooth | Grendel
-[<img src="images/collar-pillow-block.png" width="100">](stl/collar-pillow-block.stl) | Collar Pillow Block | Stephen Terrell
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