1. Plastic Grease Plug--Coloured for Grease Type, Year of manufacture
2. Weather Seal-- Non-Rubbing Water and Fire resistant
3.& 5. Outer Seal Components-- Multi-Labyrinth non-rubbing Close rubbing(Press fit seals)
4. & 6. Inner Seal Components
7. & 11. Circlip-- Locates Bearing on Shaft, One end only, Spring Steel Hardened and Tempered
8. Bearing-- Deep Groove Single Row Precision Ball or Spherical Roller Single Row C3 & C4 Clearance
9. & 10. Rear Seal Assembly--Combination pressed Metal/Plastic, Non-Rubbing Seal
12. Identification Slot
13. Shaft-- Ground Shaft Accurately Located Circlip Grooves
14. Shell & End, Deep Drawn Steel Pressing and Concentric Bearing Housing Bored with .001 Tolerance
15. Corner Radius-- Generous Radius on Corner of Roller, essential to protect Belt
16. Rigid Shell- Small Runout
17. Breather Hole