23Z crown gear bronze insert

The Slot.it inline crown gear with bronze insert: precise and durable transmission

The 23Z crown gear with bronze insert (reference SIGI23-BZ) is one of the key components in Slot.it's transmission catalogue. Designed for motors in an inline configuration —that is, with the motor arranged longitudinally, in line with the rear axle— this crown gear provides precision in meshing and a long lifespan thanks to its bronze insert, which reduces friction and improves durability compared to conventional plastic crowns.

Main features

• Number of teeth: 23Z
• Insert: bronze, for greater durability and lower friction
• Compatible axle diameter: 2.38 mm
• Motor configuration: inline (longitudinal motor, in line with the rear axle)
• Brand: Slot.it
• Reference: SIGI23-BZ

Function and performance

The bronze insert is the key differentiator of this crown gear. Unlike plastic versions, bronze performs much better under the heat and stress conditions typical of a sustained racing session. The fit on the 2.38 mm axle is firm and precise, minimising lateral play and ensuring a clean mesh with the motor pinion.

With 23 teeth, this crown gear falls within the common gear ratios for competitive inline configurations, allowing for final ratio adjustments based on the chosen pinion to adapt the car to different tracks, whether fast and flowing or technical with many curves.

Compatibility and installation

This crown gear is specifically designed for 2.38 mm axles, the most widely used standard diameter in the preparation of competitive slot cars with inline mounting. It is compatible with Slot.it chassis and transmission groups that utilise this axle size, and meshes with pinions from the Slot.it range that correspond to the same module.

For proper installation, always ensure that the alignment between the crown and pinion is parallel and without lateral tension. A slight misalignment during installation can result in vibration, noise, and premature wear, even when using components of this quality.

Common mistakes

• Confusing inline with sidewinder: this crown gear is for inline motors (longitudinal). In a sidewinder configuration (transverse motor, parallel to the axle), the mounting geometry is different and specific crowns for that layout are used.
• Not checking the axle diameter: ensure that your axle measures exactly 2.38 mm before installation. An axle of a different size may cause play or prevent installation.
• Incorrect gear ratio: combine this crown gear with the appropriate pinion to achieve the desired ratio. Always calculate the final ratio before deciding on the crown-pinion combination.

Ideal for…

This crown gear is the natural choice for those preparing inline motor cars for racing on Sport track (Scaleauto, Slot.it) or for any enthusiast looking to improve the durability and performance of their transmission compared to standard plastic crowns. Whether you are preparing a car for the club or looking to fine-tune a competitive setup, the bronze insert makes a tangible difference in the long run.

Frequently asked questions

What is the difference between a crown gear with a bronze insert and one made of plastic?

The bronze insert offers greater resistance to heat and wear generated during prolonged racing sessions. Additionally, the fit on the axle is more stable, reducing play and improving power transmission.

Is this crown gear suitable for sidewinder or anglewinder configurations?

No. The reference SIGI23-BZ is specifically designed for motors in an inline configuration, where the motor is arranged longitudinally relative to the rear axle. For sidewinder or anglewinder, Slot.it offers crown gears with different mounting geometries.

Which pinions is it compatible with?

It should be combined with pinions of the same module as those used in the Slot.it transmission range. Check the module before choosing the pinion to ensure correct meshing.

Can I use it on an axle of a different size than 2.38 mm?

It is not recommended. This crown gear is sized for an axle of exactly 2.38 mm. Using an axle of a different size may cause play, vibration, or an incorrect fit that could damage both the crown and the axle.

Do I need any special tools to install it?

For proper installation, it is recommended to use a puller and suitable mounting tools to avoid damaging the insert or forcing the fit. Slot.it and other preparation brands like Sloting Plus offer specific tools for these tasks.

The Slot.it SIGI23-BZ is a 23-tooth inline crown gear with a bronze insert, designed for 2.38 mm axles and inline motor configurations. A precision transmission component built for competitive slot car racing, offering enhanced durability and consistent mesh compared to standard plastic crowns. Compatible with Slot.it Sport track systems and matching pinion gears from the Slot.it range.