13d pinion Ergal ø7.5mm for 2mm axle

Transmission Precision: the Scaleauto Ergal Pinion for 2 mm Axle

When the goal is to reduce every gram of rotating weight and fine-tune the gear ratio, the choice of pinion makes a difference. This 13-tooth pinion from Scaleauto is machined from Ergal, a high-strength, low-density aluminium alloy widely used in competition setups, combining structural lightness with notable durability against wear.

Main Features

• Number of teeth: 13
• Material: Ergal (high-strength aluminium alloy)
• Outer diameter: ø 7.5 mm
• Axle diameter: 2 mm
• Reference: SC-1096E75
• Brand: Scaleauto

Function and Performance

The pinion is the link between the motor and the crown gear, and its geometry directly affects the car's gear ratio. With 13 teeth, this pinion allows for relatively short or long gear configurations depending on the crown gear it is paired with, making it a common choice in setups where quick response in corners and acceleration in technical sections is desired.

The Ergal offers two key advantages over standard plastic pinions: lower rotating inertia due to its low density, and greater dimensional precision as it is a machined part. This results in a cleaner transmission, with less vibration and better meshing with the crown gear.

Compatibility and Installation

This pinion is designed for 2 mm diameter axles, a common measurement in many competitive slot setups. Before installation, it is advisable to check that the tooth pitch is compatible with the crown gear used in your configuration. The fit between the pinion and crown gear is crucial: too tight generates friction and heat; too loose results in efficiency loss and premature wear.

For correct installation, we recommend using an appropriate axle lock and checking the alignment of the motor-pinion-crown assembly before final tightening. Scaleauto offers coordinated crowns and pinions within its spare parts catalogue, making it easier to find the ideal combination for each circuit and motor configuration.

Installation and Preparation

• Verify that the motor axle measures exactly 2 mm before installing the pinion.
• Check the compatibility of module and tooth pitch with your crown gear.
• Carefully adjust the fit: the meshing should be smooth, with no play or excessive pressure.
• Apply a small amount of appropriate lubricant on the teeth to prolong the lifespan of the assembly.
• After the first track sessions, check the condition of the pinion for any irregular wear.

Ideal for…

This pinion fits particularly well in club competition-oriented setups or in tuning slot cars that aim to reduce mechanical losses in the transmission. It is also an excellent option for those upgrading their standard plastic cars with higher precision machined components.

Frequently Asked Questions

Which crown gears is this pinion compatible with?

It depends on the tooth module. It is essential that the module of the pinion matches that of the crown gear for correct meshing. Check the specifications of your crown gear before pairing it.

What advantage does Ergal have over plastic in a pinion?

Ergal is a machined aluminium alloy that offers greater dimensional precision, lower rotating inertia, and better wear resistance than moulded plastic pinions. On track, this results in a smoother and more consistent transmission.

Is it compatible with 2 mm axle motors from any brand?

In principle, yes, as long as the motor axle measures exactly 2 mm. However, it is advisable to verify the actual measurement of your motor's axle with a caliper before installing the pinion.

Does it require lubrication?

Yes. Although Ergal is durable, applying a small amount of specific lubricant for slot transmissions prolongs the lifespan of the pinion and crown gear, and improves the efficiency of the assembly.

Can I use it on Scaleauto tracks and also on other brands?

The pinion is installed on the car, not on the track, so it is compatible with any circuit regardless of the rail system. Its application depends solely on the measurements of the motor axle and the crown gear of the car.

The Scaleauto SC-1096E75 is a 13-tooth Ergal pinion gear with a 7.5 mm outer diameter, designed for 2 mm motor axles. Machined from high-strength aluminium alloy, it delivers reduced rotational inertia and precise meshing for slot car racing builds. A key upgrade for club competitors and serious hobbyists looking to optimize their drivetrain efficiency.