11-tooth ergal pinion 6.5mm

Precision in Transmission with the Slot.it 11-Tooth Ergal Pinion

Slot.it is one of the undisputed references in the world of competitive slot racing, and its range of ergal pinions is a testament to this. This 11-tooth pinion with a diameter of 6.5 mm is made from ergal, a high-strength aluminium alloy with low weight, commonly used in applications where lightness and rigidity are crucial.

Function and Performance

The pinion is the component of the transmission that directly engages with the crown gear, transferring the motor's rotation to the rear axle. Its geometry, number of teeth, and material directly influence the final gear ratio and the efficiency of the mechanical assembly.

• Material: Ergal (high-strength aluminium alloy)
• Number of teeth: 11
• Diameter: 6.5 mm

Ergal provides a weight reduction compared to steel or brass pinions, resulting in lower rotational inertia. In competition, this can make a difference in the motor's response to sudden changes in speed or during braking. Moreover, the precision machining that characterises Slot.it ensures smooth engagement with the corresponding crown gear without play.

Compatibility and Installation

This pinion is designed to be used in the Slot.it transmission line, so it is advisable to combine it with crowns and axles from the same brand to ensure proper engagement and optimal alignment. Before installing any pinion, it is important to verify that the motor shaft diameter is compatible with the pinion hole.

When adjusting the transmission, the choice of the number of teeth on the pinion in relation to those on the crown defines the gear ratio: a pinion with fewer teeth against a large crown provides more torque and acceleration (useful on technical circuits with many curves), while increasing the number of teeth on the pinion or reducing those on the crown favours top speed on fast and flowing layouts.

Common Mistakes

• Not verifying the compatibility of the motor shaft diameter before installation.
• Combining pinions and crowns of different modules, leading to poor engagement and premature wear.
• Over-tightening the securing screw and damaging the pinion or shaft.
• Forgetting to check the play between pinion and crown after installation: neither too tight (causing heating and wear) nor too loose (resulting in loss of efficiency and noise).

Frequently Asked Questions

What advantage does ergal offer over steel in a pinion?

Ergal is significantly lighter than steel, which reduces the rotational inertia of the transmission assembly. This improves the motor's response and can provide a real advantage in competition, especially on circuits with many curves and changes of pace.

Which Slot.it crowns is this pinion compatible with?

It should be combined with Slot.it crowns of the same module to ensure correct engagement. We recommend consulting the Slot.it compatibility chart or contacting us if you have questions about which crown is suitable for your setup.

How does the number of teeth on the pinion affect track behaviour?

A pinion with fewer teeth combined with a large crown offers greater acceleration and torque, ideal for technical circuits. If the number of teeth on the pinion is increased or the crown is reduced, it favours maximum speed on faster layouts. The optimal adjustment depends on the circuit and the motor used.

Is any adhesive necessary to secure the pinion to the motor shaft?

Slot.it pinions are usually secured using a small Allen screw. It is not common or advisable to use adhesives, as they would complicate disassembly for future adjustments. Ensure you tighten the screw with the appropriate tool without exceeding the torque.

Is this pinion valid for any motorisation configuration?

It can be used in sidewinder, inline, or anglewinder configurations, as long as the motor shaft diameter is appropriate and the module of the crown it engages with is respected.

Slot.it SIPI6511E ergal pinion 11 teeth 6.5mm — lightweight alloy slot car pinion for precision transmission setups. Compatible with Slot.it crown gears of the same module. Ideal for club racing and competitive slot car tuning. Reduces rotational inertia for faster throttle response. Available at Ministry of Hobby.