Crown gear 36t

Precision on every lap: the 36-tooth crown gear from Avant Slot

The 36z Crown (ref. AV20661) from Avant Slot is a replacement part designed for sidewinder configurations, meaning the motor is positioned parallel to the rear axle. With 36 teeth, an aluminium core, an M2 screw, and a diameter of 18.75 mm, it offers the robustness and geometry necessary for a clean and consistent transmission.

Technical specifications

• Number of teeth: 36z
• Configuration: transverse (sidewinder)
• Core: aluminium
• Fixing screw: M2
• Diameter: 18.75 mm
• Manufacturer: Avant Slot
• Reference: AV20661

Function and performance

The crown gear is the final link in the transmission chain of a sidewinder slot car: it receives the motion from the motor pinion and transfers it directly to the rear axle. A tooth count of 36z combined with a diameter of 18.75 mm allows for moderate gear ratios, suitable for both club circuits and home tracks where top speed is sought without sacrificing controllability.

The aluminium core reduces weight compared to plastic or zamak versions while providing sufficient stiffness to withstand the motor's torque without deforming. The M2 screw ensures a secure attachment to the axle and facilitates adjustments during car preparation.

Compatibility and installation

This crown gear is designed for use in sidewinder setups with Avant Slot chassis and mechanics. Before installation, it is advisable to verify that the motor pinion is compatible in module with this crown gear to ensure correct meshing without play. A well-adjusted mesh — neither too tight nor with excessive play — is key to avoiding premature wear and unwanted noise on track.

Installation and preparation

For optimal installation, clean the rear axle before placing the crown gear, ensure it is perpendicular to the axle, and tighten the M2 screw with the appropriate tool without over-torquing, as aluminium can be damaged by excessive tightening. If using a rear magnetic brake, check that the crown gear does not interfere with the magnet's position once installed.

Frequently asked questions

What motor configuration is this crown gear designed for?

For sidewinder setups, where the motor is positioned parallel to the rear axle. It is not designed for inline or anglewinder configurations.

What advantage does the aluminium core offer over other materials?

Aluminium provides a good balance between reduced weight and structural stiffness. It helps maintain the concentricity of the crown gear even under the torque of higher-powered motors, which is important for smooth and durable transmission.

What pinion should I use with this 36-tooth crown gear?

The pinion must be of the same module as the crown gear to ensure correct meshing. Check the specifications of your Avant Slot motor and chassis to select the compatible pinion. Do not guess the combination: test the mesh before gluing or permanently fixing it.

Can this crown gear be used on chassis from other brands?

Technically it is possible if the pinion module matches and the axle dimensions are compatible, but Avant Slot designs and validates it for its own chassis and mechanics. To ensure the best results, use it within the Avant Slot ecosystem.

How often should I check or replace the crown gear?

It depends on usage and the proper lubrication of the transmission system. Inspect the teeth periodically for wear or chipping, especially if you notice noise or loss of smoothness in the transmission. A worn crown gear can transmit vibration and affect performance on track.

The Avant Slot AV20661 is a 36-tooth sidewinder crown gear featuring an aluminium body, M2 fixing screw and 18.75 mm diameter. Engineered for slot car transmission systems, it delivers consistent power transfer and durability in club and home racing setups. A reliable replacement part for Avant Slot chassis builds.