30d crown. polyamide Anglewinder 25° Procomp-RS M

Custom Transmission: Scaleauto 30-Tooth Crown Gear for 25° Anglewinder

The reference SC-1170R from Scaleauto is a 30-tooth crown gear made from polyamide, specifically designed for 25° Anglewinder setups with the Procomp-RS M motor. A transmission component aimed at those seeking reliability and precision in every corner.

Function and Performance

The crown gear is one of the most critical components in a slot car's transmission: it receives the motion from the motor's pinion and transfers it to the rear axle to drive the wheels. A poorly selected crown gear—whether due to tooth count, material, or mounting angle—can result in power loss, increased wear, or even erratic behaviour on track.

In this component, the polyamide material offers a good combination of lightness, wear resistance, and low friction, especially in angled setups where the load on the tooth flanks differs from that of a conventional sidewinder or inline. The 25° angle corresponds to the Anglewinder family, where the motor is positioned at an angle to the rear axle, seeking a compromise between compactness and centre of gravity.

Compatibility

This crown gear is designed to work in conjunction with the Procomp-RS M motor from Scaleauto in a 25° Anglewinder configuration. If you are building or preparing a chassis with this motor and arrangement, the SC-1170R is the correct reference to ensure proper meshing with the corresponding pinion.

It is important to verify that the pinion you are using is compatible with the 30 teeth of this crown gear and the 25° angle before completing the assembly. A well-chosen gear ratio will make the difference between a car that delivers all the power from the motor and one that dissipates it through friction or slipping.

Assembly and Preparation

Installing the crown gear on an anglewinder requires attention to the alignment between the pinion and crown. Ensure that both elements are in the same plane and that the tooth play is as minimal as possible without causing excessive rubbing. A small adjustment in the motor position or axle spacers can make a notable difference in the final behaviour.

In terms of maintenance, polyamide does not require intensive lubrication, but a small amount of specific slot transmission lubricant applied sparingly will extend the lifespan of the pinion-crown assembly and reduce operational noise.

Frequently Asked Questions

Which motors is this crown gear compatible with?

It is specifically designed for the Scaleauto Procomp-RS M motor in a 25° Anglewinder configuration. For other motors or mounting angles, consult the specific references from Scaleauto.

What advantages does polyamide have over other materials?

Polyamide offers lightness, good wear resistance, and reduced friction. It is a widely used material in slot crown gears due to its balance between durability and dynamic performance.

What exactly is an Anglewinder configuration?

The Anglewinder is a layout where the motor is positioned at an angle to the rear axle of the car. Unlike the sidewinder (transverse motor, parallel to the axle) or the inline (longitudinal motor, perpendicular to the axle), the anglewinder seeks a middle ground that facilitates chassis design and centre of gravity.

How many teeth should the pinion have to use this 30-tooth crown gear?

The number of teeth on the pinion determines the final gear ratio. Scaleauto offers different pinions compatible with this crown gear; the choice depends on the circuit and desired performance. Consult the Scaleauto gear ratio chart for guidance.

Is it necessary to lubricate the polyamide crown gear?

It is not strictly necessary, but applying a very small amount of specific slot transmission lubricant improves the lifespan of the assembly and reduces noise. Avoid excess: too much lubricant can contaminate the braids or tyres.

The Scaleauto SC-1170R is a 30-tooth polyamide crown gear engineered for 25° anglewinder motor setups with the Procomp-RS M motor. Designed for slot car racing enthusiasts looking for reliable and precise power transmission, this crown gear combines low friction, durability, and accurate meshing to maximise performance on the track. A go-to choice for club racers and serious builders working with Scaleauto anglewinder configurations.