13d pinion. Brass ø7.0mm for 2mm axle.

The pinion that keeps your slot transmission under control

The Scaleauto SC-1096A70 is a 13-tooth pinion made of brass, with an outer diameter of 7.0 mm and designed to fit on 2 mm axles. An apparently small part that has a direct impact on transmission efficiency, motor response, and the car's consistency on track.

Function and performance

The pinion is the link that connects the motor to the crown gear, and its correct selection determines the final gear ratio of the car. With 13 teeth, this pinion falls within a common reduction range for competition or Sport track setups, offering a balance between acceleration and top speed depending on the crown gear it is paired with.

Brass as a material offers several specific advantages over other options:

• Greater durability than plastic, especially under continuous load.
• Good wear resistance in contact with crown gears made of different materials.
• Precise machining that ensures a clean engagement without unnecessary play.
• Stable behaviour under temperature variations during long sessions.

Compatibility and installation

This pinion is designed for 2 mm diameter axles, a standard measurement in most motors and transmission sets in the current slot market. It is compatible with inline (motor in line with the rear axle) and sidewinder (motor parallel to the rear axle) configurations, as long as the wheelbase and the crown gear used are suitable to take advantage of the pinion's tooth pitch.

To achieve the best performance, we recommend checking the alignment between pinion and crown gear before each running session and ensuring that the tightening on the axle is correct: neither too loose (which would generate vibrations and uneven wear) nor excessively tight (which could hinder future adjustments).

Installation and preparation

• Ensure that the axle is free of burrs or dirt before inserting the pinion.
• Adjust the longitudinal position of the pinion to achieve full overlap with the crown gear.
• Apply a minimal amount of lubricant to the engagement, avoiding excess that could affect the braids or guide.
• Periodically check the wear of the pinion: brass teeth usually show clear signs when it is time to replace them.

Common mistakes

• Combining pinions and crown gears with incompatible tooth pitches. Ensure that the module of the pinion matches that of the crown gear to avoid poor engagement.
• Not checking lateral alignment. An off-centre pinion relative to the crown gear causes premature wear and loss of efficiency.
• Over-tightening. Brass is strong, but a mounting with too much pressure can deform the axle hole over time.

Ideal for…

This pinion fits particularly well in preparations for Sport track slot cars, both for recreational use and in club championships where a reliable and repeatable transmission is sought. It is also a common replacement reference in preparation workshops that work with Scaleauto chassis or 2 mm axle motors from other compatible brands.

Frequently asked questions

Which crown gears is this pinion compatible with?

Compatibility depends on the module (tooth pitch) of the crown gear. Before combining them, check that both parts share the same module to ensure correct engagement without skipping.

Can I use this pinion on 2 mm axle motors from other brands?

Yes, the 2 mm axle diameter is a widely used standard measurement. However, always check the module of the pinion and the alignment with the crown gear of your setup before running.

What gear ratio do I get with 13 teeth?

The final gear ratio depends on the number of teeth of the crown gear it is combined with. Dividing the teeth of the crown gear by those of the pinion (13) gives you the reduction: the higher the result, the more torque and lower top speed, and vice versa.

Does brass require special maintenance?

No special maintenance is required beyond moderate lubrication at the engagement point with the crown gear and periodic visual checks of tooth wear.

When is it advisable to replace the pinion?

When visible wear is observed on the flanks of the teeth, an increase in noise in the transmission, or play in the engagement with the crown gear. Preventive replacement before excessive wear extends the lifespan of the crown gear and the motor.

The Scaleauto SC-1096A70 is a 13-tooth brass pinion gear with a 7.0 mm outer diameter, designed for 2 mm axles. A precision slot car transmission part compatible with standard 2 mm motor shafts, ideal for Sport track setups, club racing and inline or sidewinder motor configurations. Reliable, durable and easy to fit for any slot car enthusiast looking for consistent drivetrain performance.