The document summarizes a session on rotational systems and bottom brackets. It will cover major and minor rotational systems, the six parts of every rotational system, overhauling and adjusting one-piece and three-piece bottom brackets, and a lesson on left-hand and right-hand threads. Attendees will learn how to remove, clean, install, and adjust a bottom bracket and associated parts using the proper tools. The session will include demonstrations of bottom bracket types, tools, adjusted conditions, and worn parts.

1. Session #4: Rotational Systems – Bottom Bracket
Bike Monkeys
Community Bicycle Center
Introductory Information & Stuff
 Thank you notes:
 Announcements: ???
 Shop Chores: ???
Lesson A: Rotational Systems
 Major and minor rotational systems:
 Major: Bottom Bracket, Front & Rear Hubs, Headset
 Minor: Jockey Wheels, Pedals, Freewheel
 Six Parts of every rotational system:
1. Cup
2. Cone
3. Bearings
4. Grease
5. Axle
6. Locknut
Lesson B: Bottom Brackets
 One Piece Bottom Bracket Overhaul & Adjustment
 Three Piece Bottom Bracket Overhaul & Adjustment
 Left-Hand and Right-Hand Thread Lesson
 Bottom Bracket Tools & associated parts matching activity
 Guess what’s wrong with this bottom bracket part activity
Remove, Clean, Install, and Adjust Bottom Bracket and associated parts
 Tools: pedal wrench, crank puller, hook spanner, lock ring spanner, fixed cup remover, bottom
bracket press, pin spanner, socket wrench
 Keeping parts together in proper order
 Save all old parts until bike repair is completed
Demonstration Parts:
 One-piece bottom brackets
 Three-piece bottom brackets
 Bottom bracket tools
 Right and left hand threaded parts
 Rotational Systems: adjusted too loose and too tight
 Worn and pitted parts: cups, spindles, and bearings
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