11t pinion. Steel for 2mm axle. ø6.0mm x 2.5mm

Tuned Transmission: the Scaleauto Steel Pinion for 2 mm Axles that Makes a Difference in Preparation

Within the world of slot car preparation in 1/32 scale, the transmission is one of the points where real performance is gained or lost on track. This steel pinion with 11 teeth from Scaleauto (ref. SC-1131B60) is manufactured to fit precisely onto 2 mm axles, with an outer diameter of ø6.0 mm and a width of 2.5 mm.

Function and Performance

The pinion is the link between the motor and the crown gear: it transmits the rotation from the motor shaft to the rear crown, determining the gear ratio and, therefore, the top speed and acceleration of the car. A steel pinion offers greater durability and dimensional accuracy compared to plastic versions, reducing play and backlash in the transmission.

With 11 teeth, this pinion falls into the low-medium tooth range, resulting in a more aggressive gear reduction when combined with high-tooth crowns: greater acceleration and response on circuits with many curves and short sections.

Compatibility and Installation

This pinion is designed for 2 mm diameter axles, the most common size in 1/32 scale slot car preparations. Before installation, it is advisable to verify:

• That the motor shaft has exactly 2 mm in diameter.
• That the pinion's module is compatible with that of the crown you are using (check the specifications of your Scaleauto crown or another compatible brand).
• That the width of 2.5 mm fits correctly in the available space between the motor and the chassis without rubbing.

The fit on the axle can be done using a small mounting tool to avoid damaging the teeth or deforming the inner hole. It is recommended to check the alignment with the crown before finalising the installation.

Common Mistakes When Changing the Pinion

• Not verifying the module: a pinion and crown with different modules will not mesh correctly even if they have the same visual pitch.
• Forcing the installation: pressing the pinion on with a sudden force without a tool can damage the motor shaft.
• Ignoring lateral play: a misaligned pinion relative to the crown causes premature wear and noise.
• Changing only the pinion without checking the crown: if the crown is worn, performance will not improve even if the pinion is new.

Frequently Asked Questions

What scale is this pinion designed for?

It is designed for slot cars in 1/32 scale, where 2 mm axles are the standard size in preparations and competition setups.

Is it compatible with any motor that has a 2 mm axle?

In principle, yes, as long as the pinion's module matches that of the crown you are using. Always check module compatibility before installation.

What advantage does steel have over plastic in a pinion?

Steel offers greater wear resistance, better dimensional accuracy, and less backlash in the transmission. In intensive use or competition circuits, durability is significantly superior.

How many teeth is it advisable to use depending on the type of circuit?

An 11-tooth pinion favours acceleration, making it more suitable for technical circuits with tight corners and short sections. For fast circuits with long straights, a pinion with more teeth may be preferable to gain top speed.

Can this pinion be used in sidewinder, inline, or anglewinder configurations?

Yes, the type of motor mounting (sidewinder, inline, or anglewinder) does not affect the use of this pinion, as long as the motor shaft is 2 mm and the module is suitable for the chosen crown.

The Scaleauto SC-1131B60 is an 11-tooth steel pinion gear for 2 mm motor axles, with an outer diameter of 6.0 mm and a width of 2.5 mm. Designed for 1/32 scale slot car racing, it delivers precise, durable power transmission and is a key component for serious club racers and slot car builders looking to fine-tune their drivetrain setup.