11z 7mm diameter Nylon Pinion

Thunderslot Nylon Pinion: 11 Teeth, 7 mm Diameter for Precise Transmission

The pinion is one of the components that most influences the behaviour of a slot car and yet often receives less attention than it deserves. This 11-tooth nylon pinion with a 7 mm diameter from Thunderslot (ref. TH-PN11PL) is designed to operate smoothly, reduce transmission noise, and provide a clean engagement with the crown gear.

Function and Performance

The pinion is the link between the motor and the crown gear: it transmits the rotation of the motor shaft to the rear axle of the car. A well-chosen pinion — in terms of tooth count and material — directly determines the gear ratio, available acceleration, and top speed on track.

• Nylon Material: reduces friction and noise compared to metal pinions, as well as better absorbing micro-vibrations from the motor.
• 11 Teeth: configuration that allows for adjusting the gear ratio by combining it with different crown gears, seeking a balance between acceleration and top speed.
• 7 mm Diameter: measurement that facilitates installation in mounts compatible with Thunderslot parts.

Compatibility and Installation

This pinion is designed by Thunderslot for its own transmission sets. Always check that the diameter of the central hole fits your motor shaft and that the module of the pinion is compatible with that of the crown gear you are using before installation. A poor module pairing causes premature wear and excessive noise.

Common Mistakes When Working with Nylon Pinions

• Over-tightening the fixing screw: this can deform the nylon and cause eccentricity in the rotation.
• Not checking the centre distance: if the pinion is too tight against the crown gear, the transmission locks; if it is too far apart, there is play and loss of efficiency.
• Mixing different modules between pinion and crown gear: even if they fit at first glance, wear will be much faster.

Frequently Asked Questions

What advantage does nylon have over metal in a pinion?

Nylon generates less noise, operates more quietly, and is more tolerant of small misalignments between pinion and crown gear. Conversely, it has less resistance to extreme heat, although in a club or recreational slot car this limitation is usually not relevant.

Which crown gears should I combine with this pinion?

It should be combined with crown gears of the same module as the TH-PN11PL pinion. Consult the Thunderslot transmission table or contact us if you have questions: we help you find the right combination for your car and track.

How does the number of teeth affect driving?

With fewer teeth on the pinion (or more on the crown), you get more acceleration but less top speed. With more teeth on the pinion (or fewer on the crown), you gain top speed at the expense of some initial acceleration. 11 teeth is an intermediate configuration, versatile for mixed circuits.

Is it a consumable that I should check periodically?

Yes. Nylon wears out with use, especially if the centre distance is not properly adjusted. Check the condition of the pinion and crown gear every few sessions, especially if you notice an increase in noise or loss of efficiency in the transmission.

The Thunderslot TH-PN11PL is an 11-tooth nylon pinion gear with a 7 mm diameter, designed for smooth and quiet power transmission in slot car drivetrains. Compatible with Thunderslot transmission systems, it is an essential spare part for slot car tuning, setup and maintenance — ideal for club racers and hobbyists looking to fine-tune their gear ratio and improve on-track performance.