19-tooth pulley

Precise transmission for Raid and Rally chassis: 19-tooth pulley for 2.38 mm axles

The toothed pulley PSP-19D238 is a transmission component designed for those seeking reliability and lightness in their competition setups. With 19 teeth and a central bore adapted for 3/32 (2.38 mm) axles, it fits perfectly into the most commonly used belt drive transmission systems in Raid and Rally chassis.

Main features

• Number of teeth: 19 z
• Axle diameter: 3/32 (2.38 mm)
• Belt compatibility: MXL
• Material: Lightweight aluminium
• Construction: Manufactured as a single piece, without joints or inserts
• Finish: Silver colour

Function and performance

In belt drive transmission systems, the pulley is the element that converts the motor's rotation into axle movement. A well-machined pulley reduces vibrations, improves transmission efficiency, and extends the life of the belt. The construction from a single piece of lightweight aluminium ensures concentricity and balance, two critical factors at high RPM.

The toothed profile MXL is one of the most widely used standards in competitive slot car chassis, especially in Raid and Rally categories where smooth transmission and torque control are crucial for circuit performance.

Compatibility

This pulley is compatible with MXL profile belts and 3/32 (2.38 mm) diameter axles. It is advisable to check the centre-to-centre distance and belt tension when installing this pulley on the chassis, adjusting according to the specifications of the corresponding chassis manufacturer.

Installation and preparation

Being a lightweight aluminium component manufactured as a single piece, installation is straightforward and direct. We recommend cleaning the axle before installation to ensure a good fit and, if the system allows, securing it with a lateral pressure screw to prevent axial movement during the race. Checking the alignment with the motor pulley is essential to avoid premature belt wear.

Ideal for…

This reference is aimed at tuners and drivers competing in Raid and Rally categories who work with MXL belt drive chassis. It is also useful in scratch or conversion projects where a lightweight and well-machined pulley for 2.38 mm axles is needed.

Frequently asked questions

What type of belt is this pulley compatible with?

It is compatible with MXL profile belts, the most common standard in Raid and Rally chassis with belt drive transmission.

What axle diameter is it designed for?

It is designed for 3/32 axles, equivalent to 2.38 mm in diameter.

Is it necessary to use a pressure screw to secure it to the axle?

It depends on the chassis design. In competitive applications, we always recommend securing the pulley with a lateral pressure screw to prevent any axial movement under load.

Is it compatible with chassis from other disciplines besides Raid and Rally?

It can be used in any chassis that employs MXL belt drive and 2.38 mm axles, although its most common use is in Raid and Rally categories.

Is the silver colour an anodised finish?

The official description indicates silver colour in lightweight aluminium. We cannot confirm if it is a specific anodisation without additional information from the manufacturer.

The PSP-19D238 is a 19-tooth MXL belt pulley for 3/32 (2.38 mm) axles, machined in a single piece of lightweight aluminium. Designed for Raid and Rally slot car chassis with belt drive transmission systems, it offers precise, vibration-free power transfer at high RPM. Compatible with standard MXL belts, it is a reliable upgrade or replacement part for competitive slot car builders.