BilliB clocks have all or some of the following:
- 35 punched & enlarged oil cups = punching hardens the brass plate and increases oil capacity promoting longer movement life.
- Four jewels, on some movements = Jewels require very little lubrication and will hold closer tolerances. (jewels are not used on large gears as they would crack under stress)
- Nine bronze bushings on some movements = bronze is stronger & harder than common alloys apart from steel but exceeds steel in corrosion resistance and ease of lubrication. (source Funk & Wagnalls)
- Six bronze bushings strategically placed result in the gears moving against highly polished pinion steel in a bronze bushing is known as the best combination for minimising movement wear. (source Funk & Wagnalls)
- Pivot inserts made of ball bearing steel = minimal movement wear
These are some of the most common pendulum, leaders, spring combinations.
To hang the pendulum, locate the pendulum through the upper side or back access opening. While holding the pendulum guide with your left hand, slip the pendulum in through the front door with your right hand. Place the hook on the top of the pendulum, over the pin or through the slot on the pendulum guide, lower the pendulum until it is hanging CARE should be taken to ensure that the pendulum is secure before letting go. Avoid twisting the pendulum as this could break the suspension spring.