RcThjia 48P Hardened Steel Pinion Gear Set (5pcs) 16T-20T with Hex Key for RC Motor Shaft 3.175mm
RcThjia 48P Hardened Steel Pinion Gear Set (5pcs) 16T-20T with Hex Key for RC Motor Shaft 3.175mm
This 48-pitch hardened steel pinion gear set from RcThjia includes five pinions with tooth counts from 16 to 20, each featuring a 3.175mm (1/8 inch) bore for standard RC motor shafts. Designed for brushless and brushed motor upgrades in RC cars, the set comes with set screws and a hex key for simple installation. If you are fine-tuning your car's gearing for better speed or acceleration, this set offers a practical range of options.
What tooth counts are included in this pinion gear set?
The set contains five gears: 16T, 17T, 18T, 19T, and 20T. All share the same 48 pitch (48DP), meaning the distance between teeth is consistent across the set. This pitch must match your spur gear's pitch for proper meshing.
Gear specifications and dimensions
| Pitch | 48DP (48 teeth per inch of pitch diameter) |
| Tooth counts | 16, 17, 18, 19, 20 (one each) |
| Shaft hole diameter | 3.175mm (1/8 inch) |
| Material | Hardened steel |
| Included tools | Hex key (screwdriver) and set screws for each gear |
How to choose the right pinion gear for your RC car
Start with the smallest tooth count (16T) and test the car's performance at low speeds. Gradually move to larger pinions (17T-20T) while monitoring the temperature of the ESC and motor after each run. If the motor or ESC gets too hot, reduce the pinion size. This method helps you find the fastest gear without overheating the electronics.
Installation and use tips
Ensure the motor shaft is clean and fully inserted into the gear's bore. Tighten the set screw firmly using the provided hex key. Always confirm that the pinion and spur gear have the same pitch (48P) or the teeth will not mesh properly. The included hex key works for all set screws in the set.
Frequently asked questions about this gear set
Are these gears compatible with any RC motor?
They fit motors with a 3.175mm (1/8 inch) shaft diameter. Measure your motor shaft to confirm the size before purchase.
What does 48P mean?
48P refers to the diametral pitch: the number of teeth per inch of the gear's pitch diameter. This standard is common in 1/10 scale and other RC cars.
Can I use these with a brushed motor?
Yes. The gears work with both brushless and brushed motors as long as the shaft diameter matches 3.175mm.
How many gears are in the set?
Five gears (16T, 17T, 18T, 19T, 20T) plus one hex key and five set screws.