9d Pinion M50 Nylon

Scaleauto SC-1009 Pinion: precision and durability in nylon for competition transmissions

The SC-1009 from Scaleauto is a 9-tooth, module 50 pinion made from high-durability nylon, designed to work with standard 2 mm axles. Its material offers a good balance between lightness and wear resistance, which is particularly noticeable during long running sessions or championship days.

Main features

• Teeth: 9
• Module: 50
• Material: high-durability nylon
• Compatible axle diameter: standard 2 mm
• Pack contents: 4 units
• Reference: SC-1009

Function and performance

The pinion is the component that transmits the motor's rotation to the crown gear, and its selection directly influences the car's gear ratio. A 9-tooth pinion with module 50 is a common choice in setups that seek more torque in technical circuits or tight corners, where control is prioritized over top speed.

Nylon, compared to brass, slightly reduces the weight in the transmission and better absorbs the micro-impacts of the gearing, which can extend the lifespan of the crown gear it works with. However, in very high-performance motors with high torque, it is advisable to regularly check the backlash adjustment to avoid premature wear.

Compatibility and installation

Designed for a standard 2 mm axle, it fits into the vast majority of common mounting configurations in slot racing. It is essential to ensure that the module of the crown gear it pairs with is also module 50 to guarantee correct meshing without excessive play.

The pack of 4 units is practical for having immediate spares in the competition box as well as for preparing several cars at once with the same transmission setup.

Installation and preparation

When installing the pinion, pay attention to the following points to get the most out of it:

• Correctly align the pinion with the crown gear before securing the motor: a lateral misalignment generates uneven wear and noise.
• Adjust the backlash (play between pinion and crown) to allow the minimum play that permits free rotation without excessive friction. A sheet of paper between teeth is a classic reference.
• Secure the pinion to the axle with the pressure screw tightly fastened, ensuring there is no axial play.
• Periodically check the condition of the pinion, especially on the flanks of the teeth, which are the first area to show wear.

Common mistakes

• Combining pinion and crown gears of different modules: the resulting meshing generates vibrations, noise, and accelerated wear.
• Over-tightening the backlash: while it seems to provide more traction, it actually generates heat and premature wear on both components.
• Not checking the motor-rear axle alignment before running: a few millimetres of deviation are clearly noticeable in performance and durability of the drivetrain.

Frequently asked questions

What crown gear should I use with this pinion?

Any crown gear of module 50 is compatible in terms of gearing. The choice of the number of teeth on the crown will depend on the gear ratio you are looking for: more teeth on the crown implies more top speed; fewer teeth, more torque and acceleration.

Is nylon or brass better for a pinion?

It depends on the use. Nylon is lighter and gentler on the crown, which can prolong the life of both components in regular use. Brass offers greater rigidity and resistance in very high torque motors. For club use and amateur competition, nylon is a very balanced choice.

What types of motor is this pinion compatible with?

It is compatible with any motor that has a 2 mm diameter output shaft, which is the most widely used standard in slot racing motors.

Can I use this pinion in sidewinder, inline or anglewinder configurations?

Yes. The pinion itself is independent of the type of motor configuration. Whether the motor is mounted parallel to the rear axle (sidewinder), in line with the car (inline), or at an angle (anglewinder), what determines compatibility is the diameter of the motor shaft and the module of the crown gear, not the motor layout.

How many units does the pack include?

The SC-1009 pack includes 4 units, sufficient to equip several cars or have immediate spares in competition.

The Scaleauto SC-1009 is a 9-tooth, module 50 nylon pinion gear designed for standard 2 mm axles in slot car racing. Pack of 4 units, ideal for club racing, competition setups and transmission tuning. Lightweight and durable nylon construction ensures smooth mesh and reduced wear on the mating crown gear. Compatible with sidewinder, inline and anglewinder motor configurations.