31t angled crown gear

31-Tooth Angle Crown: The Precise Transmission Your Anglewinder Needs

The 31z Angle Crown AV20657 from Avant Slot is a key component for any anglewinder setup. With 31 teeth, a diameter of 16 mm, and designed for a 2.38 mm axle, it fits in configurations where the motor is positioned at an angle relative to the rear axle, a setup widely used in club racing for the good balance it offers between centre of gravity and transmission performance.

Features and Function

• Number of Teeth: 31z
• Diameter: 16 mm
• Axle Compatibility: 2.38 mm
• Fixing System: M2 screw (included in the pack)
• Mounting Type: Anglewinder configuration

The included M2 screw facilitates a secure and play-free installation, a critical aspect in anglewinder transmissions where any play directly affects the car's response and leads to premature wear of the pinion.

Installation and Preparation

Before installing the crown, it is advisable to ensure that the axle is perfectly aligned and free of burrs in the contact area. Tighten the M2 screw firmly but without overdoing it: the right pressure is the one that eliminates play without deforming the crown's core. Once installed, manually check that the crown rotates without rubbing against the body or chassis, and that the engagement with the motor pinion is smooth and uniform throughout the rotation.

To achieve the best performance, it is recommended to adjust the distance between the crown and pinion using a thin sheet of paper as a temporary spacer: a correct mesh prolongs the lifespan of both parts and improves transmission efficiency.

Common Mistakes

• Installing the crown on an axle of a different diameter than specified: this can cause play or even break the core when tightening the screw.
• Not checking the alignment between the crown and pinion, leading to uneven wear and noise in the transmission.
• Over-tightening the M2 screw, deforming the crown and creating vibration.

Ideal for…

This spare part is designed for enthusiasts and competitors preparing or tuning slot cars with anglewinder motors and 2.38 mm axles. It is also useful as a maintenance spare for Avant Slot cars that come with this crown as standard, ensuring that the transmission always operates with a part in perfect condition.

Frequently Asked Questions

What axle diameter is this crown compatible with?

It is exclusively designed for 2.38 mm axles. Installing it on an axle of a different diameter may compromise the fit and damage the part.

Is the M2 screw included?

Yes, the M2 fixing screw is included in the pack, so there is no need to purchase it separately.

Is it valid for inline or sidewinder setups?

No. This crown is specific to anglewinder configurations, where the motor is positioned at an angle relative to the rear axle. Straight crowns with different geometry are required for inline or sidewinder setups.

How many teeth does it have and what gear ratio does it provide?

It has 31 teeth. The final gear ratio will depend on the pinion used on the motor: the fewer teeth the pinion has, the greater the reduction, resulting in more torque and less top speed, and vice versa.

Can I use it as a direct replacement in standard Avant Slot cars?

In Avant Slot models that come with this reference as standard, it does work as a direct replacement. It is advisable to check the manual or technical sheet of the car to confirm that the original crown is the AV20657.

The Avant Slot AV20657 is a 31-tooth anglewinder crown gear designed for 2.38 mm axles, with a 16 mm diameter and M2 screw fixing included. An essential replacement part for slot car enthusiasts and club racers building or maintaining anglewinder setups, ensuring precise and reliable power transmission on the rear axle.