Arrma HD Steel Spur Gear - 57T - 0.8Mod
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Product Information
Full details
The Arrma HD Steel Spur Gear (57T, 0.8Mod) is designed for RC enthusiasts who demand maximum durability from their drivetrain under extreme driving conditions. This high-performance component offers superior strength over stock plastic gears, making it an essential upgrade for heavy-duty bashing and high-torque applications, though it requires precise mesh adjustment during installation to prevent excessive wear.
All features
| Model Part Number | ARA310945 |
|---|---|
| Brand | ARRMA |
Extended Product Information
FAQs
Is this gear compatible with 1.0Mod pinions?
No. This gear is strictly 0.8Mod. You must use a matching 0.8Mod pinion gear for the system to operate correctly.
Do I need to grease the teeth?
It is recommended to use a small amount of dry-film lubricant, but avoid thick greases that attract dirt and grit, which can act as an abrasive.
Does this require a hardened steel pinion?
Yes. When using a steel spur gear, it is highly recommended to pair it with a hardened steel pinion gear to ensure even wear.
Will this increase my top speed?
The spur gear itself does not increase speed; speed changes are determined by the tooth count ratio between your pinion and spur.
How can I tell if my gear mesh is correct?
A perfect mesh allows for a tiny amount of back-and-forth movement between the pinion and spur teeth without binding.
Troubleshooting
Excessive noise during operation
The gear mesh is likely too tight. Loosen the motor mount and readjust the gap between the pinion and spur gear.
Rapid wear on pinion gear
Ensure both the spur and pinion are 0.8Mod pitch; using mismatched pitches will cause instant damage to both components.
Pros and Cons
Pros
- Significantly higher durability than stock plastic spur gears
- Precision CNC machining ensures smooth drivetrain operation
- Heat-treated steel resists stripping under high torque
- Compatible with a wide range of Arrma bashing platforms
Cons
- Heavier than stock plastic gears, which may impact rotating mass
- Requires more frequent lubrication than standard components
- Improper gear mesh can cause rapid pinion wear due to metal-on-metal contact
Setup, Compatibility & Care
- Installation: Remove the old plastic spur gear and ensure the mounting surface is clean of debris. Secure the new HD steel gear using the factory hardware.
- Gear Mesh: This is critical. Use a strip of paper between the pinion and spur teeth while tightening the motor mount to ensure there is just enough clearance to prevent binding without being too loose.
- Compatibility: Designed specifically for Arrma vehicles utilizing the 0.8Mod pitch system. Check your vehicle manual to confirm compatibility before installation.
- Care: Periodically inspect the teeth for signs of debris. While the steel is resistant to wear, applying a light dry-film lubricant specifically designed for RC drivetrains can extend the lifespan of the mesh.