[Skruface]

snagged from Arnie's:





Modular Gear Set.
Modify gear set is patented. A revolutionary Modular Structure design is to allowing the user to load the gears easy, speed and accuracy. You need not to adjust it with shims. It includes:
1) Modular Gear Set, 1set
2) Tempered Stainless Bushes w/ Double Oil Tank, 6pcs
3) Stainless Bushes, 6pcs (3 types available: 6mm, 6.1mm and 7mm )
4) Anti-reversal Latch, 1 pc

GB-10-01(2)GB-10-01(4)GB-10-01(5)GB-10-01(3)



GB-03-33-2Ceramic Ball Bearing.
Ceramic balls are over 100% harder than steel balls. In a hybrid bearing, the extremely hard and smooth Ceramic Ball keeps raceways clear of contaminants by pushing them away from the contact patch. In addition, the ceramic ball remains extremely smooth, preventing ball to race damage. For the end user, this means reduced bearing wear and longer bearing life at high precision.

* Vickers Hardness 10 KG Load: Ceramic = 1550, Steel = 730
Benefits of Ceramic Ball Bearing Attributes:
Dissimilar Materials (Steel and silicon nitride)
Less Wear
Lower Operating Temperature
Higher Speed
Extended Bearing Life
Lower Friction
Stiffness
Lower Vibration