Originally Posted by
IndyRC_Racer
It is always good to create a shopping list before buying. I sometimes use the online shopping cart on TamiyaUSA.com to help keep an eye on costs. Sometimes Amazon or online shipping can be cheaper but don't forget to factor in taxes & shipping costs/time.
In case anyone is having difficulty describe the different gears in a TT02, this info might help.
- Small Bevel Gear - the smaller gear that is inside the differential.
- Large Bevel Gear - the larger gear that is inside the differential. The gearbox joints are connected to the Large Bevel Gears
- Beveled Ring Gear - the large plastic gear that is on the outside & part of the differential assembly
- Beveled Pinion Gear - the smaller plastic or metal gear that attaches to the propeller joint
- Spur Gear - the typically plastic gear that attaches to the rear propeller joint
- Pinion Gear - the typically smaller gear (metal or plastic) that attaches to the motor shaft.
- Propeller Shaft - the long plastic or metal shaft that connects the front & rear propeller joint (to the differentials).
I am using terms that Taimiya uses in their manuals. Some of these gears have different names depending on the part of the world you may be in or the person you are talking to. For example some people refer to the small and large gears inside of a differental as planetary and sun gear. Other people might refer to a propeller shaft as a drive shaft where Tamiya uses the term drive shaft to describe something different
Hope this info helps
Yea it can get pretty confusing. Having rebuilt full size transmissions and rear ends, sometimes it makes me scratch my head how loosely some of these terms can get tossed around in different countries/dialects.
Hence I always try my best to simplify but clearly explain geartrain parts.
I'll always refer to the smaller gear as the pinion, and the larger gear as the spur(even when the pinion is larger than the spur on the motor 😂
, but I usually call out location too, IE driveshaft, motor or diff.
With the things I've learned personally I refer to diff internals as spider gears, pinion and spur on the driveshaft (diff), and pinion and spur on the motor. I feel these descriptions to be hard to confuse.
I have yet to see a true planetary gear set at these scales, though I am absolutely sure they exist.